/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/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:51:49,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:51:49,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:51:49,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:51:49,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 20:51:49,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 20:51:49,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 20:51:49,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 20:51:49,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 20:51:49,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 20:51:49,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 20:51:49,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 20:51:49,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 20:51:49,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 20:51:49,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 20:51:49,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 20:51:49,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 20:51:49,885 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 [2021-05-21 20:51:49,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:51:49,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:51:49,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:51:49,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:51:49,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:51:49,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:51:49,903 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:51:49,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:51:49,904 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:51:49,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:51:49,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:51:49,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:51:49,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:51:49,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:51:49,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:51:49,906 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:51:49,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:51:49,906 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:51:49,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:51:49,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:51:49,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:51:49,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:51:49,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:51:49,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:51:49,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:51:49,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:51:49,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:51:49,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:51:49,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:51:49,908 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:51:49,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:51:49,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:51:50,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:51:50,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:51:50,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:51:50,165 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:51:50,169 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:51:50,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-05-21 20:51:50,169 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-05-21 20:51:50,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:51:50,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:51:50,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:51:50,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:51:50,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:51:50,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:51:50,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:51:50,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:51:50,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:51:50,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... [2021-05-21 20:51:50,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:51:50,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:51:50,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:51:50,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:51:50,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:51:50,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:51:50,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:51:50,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:51:50,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:51:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:51:50,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:51:50,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:51:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:51:50,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:51:50,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:51:50,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:51:50,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:51:50,311 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:51:50,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:51:50,465 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:51:50,475 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:51:50 BoogieIcfgContainer [2021-05-21 20:51:50,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:51:50,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:51:50,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:51:50,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:51:50,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:50" (1/2) ... [2021-05-21 20:51:50,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190f8e43 and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:51:50, skipping insertion in model container [2021-05-21 20:51:50,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:51:50" (2/2) ... [2021-05-21 20:51:50,480 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-05-21 20:51:50,484 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:51:50,484 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:51:50,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:51:50,484 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:51:50,508 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:51:50,539 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:51:50,552 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:51:50,557 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:51:50,558 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:51:50,558 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:51:50,558 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:51:50,558 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:51:50,558 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:51:50,558 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:51:50,564 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-05-21 20:51:50,588 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:51:50,597 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:50,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:50,598 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-05-21 20:51:50,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:50,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832032376] [2021-05-21 20:51:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:50,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:50,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832032376] [2021-05-21 20:51:50,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832032376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:50,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:50,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:51:50,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281068029] [2021-05-21 20:51:50,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:51:50,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:50,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:51:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:51:50,754 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:50,786 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2021-05-21 20:51:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:51:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:51:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:50,793 INFO L225 Difference]: With dead ends: 84 [2021-05-21 20:51:50,793 INFO L226 Difference]: Without dead ends: 56 [2021-05-21 20:51:50,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:51:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-21 20:51:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-21 20:51:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-05-21 20:51:50,817 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-05-21 20:51:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:50,817 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-05-21 20:51:50,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-05-21 20:51:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:51:50,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:50,818 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:50,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:51:50,818 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-05-21 20:51:50,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:50,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228325854] [2021-05-21 20:51:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:50,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:50,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228325854] [2021-05-21 20:51:50,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228325854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:50,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:50,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:51:50,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097734744] [2021-05-21 20:51:50,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:51:50,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:51:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:51:50,842 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:50,866 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2021-05-21 20:51:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:51:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-21 20:51:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:50,868 INFO L225 Difference]: With dead ends: 80 [2021-05-21 20:51:50,868 INFO L226 Difference]: Without dead ends: 66 [2021-05-21 20:51:50,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-21 20:51:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-21 20:51:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-05-21 20:51:50,875 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-05-21 20:51:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:50,875 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-05-21 20:51:50,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-05-21 20:51:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:51:50,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:50,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:50,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:51:50,876 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-05-21 20:51:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:50,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112839130] [2021-05-21 20:51:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:50,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:50,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112839130] [2021-05-21 20:51:50,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112839130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:50,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592573421] [2021-05-21 20:51:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:51:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:51,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592573421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:51,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:51,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-21 20:51:51,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341262239] [2021-05-21 20:51:51,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:51,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:51,062 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:51,097 INFO L93 Difference]: Finished difference Result 90 states and 188 transitions. [2021-05-21 20:51:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:51:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:51:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:51,099 INFO L225 Difference]: With dead ends: 90 [2021-05-21 20:51:51,099 INFO L226 Difference]: Without dead ends: 76 [2021-05-21 20:51:51,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-21 20:51:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-21 20:51:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-05-21 20:51:51,104 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-05-21 20:51:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:51,104 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-05-21 20:51:51,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-05-21 20:51:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:51:51,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:51,105 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:51,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-21 20:51:51,321 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:51,321 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-05-21 20:51:51,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:51,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622699271] [2021-05-21 20:51:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:51,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622699271] [2021-05-21 20:51:51,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622699271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:51,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:51,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:51:51,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133175012] [2021-05-21 20:51:51,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:51:51,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:51:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:51,361 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:51,396 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-05-21 20:51:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:51:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 20:51:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:51,398 INFO L225 Difference]: With dead ends: 98 [2021-05-21 20:51:51,398 INFO L226 Difference]: Without dead ends: 84 [2021-05-21 20:51:51,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-21 20:51:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-05-21 20:51:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-05-21 20:51:51,403 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-05-21 20:51:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:51,403 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-05-21 20:51:51,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-05-21 20:51:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:51:51,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:51,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:51,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:51:51,405 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:51,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:51,405 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-05-21 20:51:51,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:51,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805252774] [2021-05-21 20:51:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:51,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805252774] [2021-05-21 20:51:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805252774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807210336] [2021-05-21 20:51:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:51,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:51:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:51,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807210336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:51,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:51,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:51:51,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902556531] [2021-05-21 20:51:51,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:51,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:51,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:51,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:51,650 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:51,706 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-05-21 20:51:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:51:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-21 20:51:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:51,708 INFO L225 Difference]: With dead ends: 108 [2021-05-21 20:51:51,708 INFO L226 Difference]: Without dead ends: 94 [2021-05-21 20:51:51,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:51:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-21 20:51:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-05-21 20:51:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-05-21 20:51:51,727 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-05-21 20:51:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:51,727 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-05-21 20:51:51,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-05-21 20:51:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 20:51:51,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:51,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:51,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:51,929 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-05-21 20:51:51,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:51,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027229573] [2021-05-21 20:51:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:51,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:51,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027229573] [2021-05-21 20:51:51,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027229573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:51,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504050657] [2021-05-21 20:51:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:51:51,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:52,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504050657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:52,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:52,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:51:52,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668050627] [2021-05-21 20:51:52,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:51:52,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:52,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:51:52,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:52,103 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:52,219 INFO L93 Difference]: Finished difference Result 156 states and 344 transitions. [2021-05-21 20:51:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:51:52,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-21 20:51:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:52,221 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:51:52,221 INFO L226 Difference]: Without dead ends: 126 [2021-05-21 20:51:52,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:51:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-21 20:51:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-05-21 20:51:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-05-21 20:51:52,233 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-05-21 20:51:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:52,234 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-05-21 20:51:52,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-05-21 20:51:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 20:51:52,238 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:52,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:52,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:52,445 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-05-21 20:51:52,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:52,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571916772] [2021-05-21 20:51:52,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:52,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:52,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571916772] [2021-05-21 20:51:52,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571916772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:52,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016002386] [2021-05-21 20:51:52,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:52,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:51:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:51:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:52,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016002386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:52,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:52,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-21 20:51:52,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970759131] [2021-05-21 20:51:52,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:52,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:52,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:52,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:52,632 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:52,725 INFO L93 Difference]: Finished difference Result 142 states and 316 transitions. [2021-05-21 20:51:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-21 20:51:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:52,726 INFO L225 Difference]: With dead ends: 142 [2021-05-21 20:51:52,726 INFO L226 Difference]: Without dead ends: 128 [2021-05-21 20:51:52,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-21 20:51:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-05-21 20:51:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-05-21 20:51:52,730 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-05-21 20:51:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:52,730 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-05-21 20:51:52,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-05-21 20:51:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 20:51:52,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:52,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:52,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:52,951 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-05-21 20:51:52,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:52,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098004354] [2021-05-21 20:51:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:53,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098004354] [2021-05-21 20:51:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098004354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:53,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291887434] [2021-05-21 20:51:53,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:53,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:53,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:51:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:53,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291887434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:53,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:53,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-21 20:51:53,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243845844] [2021-05-21 20:51:53,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:53,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:53,152 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:53,242 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-05-21 20:51:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:51:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-21 20:51:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:53,244 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:51:53,244 INFO L226 Difference]: Without dead ends: 136 [2021-05-21 20:51:53,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:51:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-21 20:51:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-05-21 20:51:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-05-21 20:51:53,249 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-05-21 20:51:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-05-21 20:51:53,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-05-21 20:51:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 20:51:53,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:53,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 20:51:53,469 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-05-21 20:51:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:53,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576186715] [2021-05-21 20:51:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:53,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:53,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576186715] [2021-05-21 20:51:53,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576186715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:53,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084188607] [2021-05-21 20:51:53,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:53,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:51:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084188607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:53,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:53,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-21 20:51:53,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598670332] [2021-05-21 20:51:53,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:51:53,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:51:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:51:53,640 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:53,712 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-05-21 20:51:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-21 20:51:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:53,713 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:51:53,713 INFO L226 Difference]: Without dead ends: 136 [2021-05-21 20:51:53,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-21 20:51:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-05-21 20:51:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-05-21 20:51:53,718 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-05-21 20:51:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:53,718 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-05-21 20:51:53,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-05-21 20:51:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:51:53,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:53,719 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:53,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 20:51:53,929 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-05-21 20:51:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578440723] [2021-05-21 20:51:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:53,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:53,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578440723] [2021-05-21 20:51:53,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578440723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:53,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176413971] [2021-05-21 20:51:53,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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) [2021-05-21 20:51:54,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:54,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:54,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:51:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:54,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176413971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:54,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:54,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:51:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614333119] [2021-05-21 20:51:54,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:51:54,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:51:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:54,139 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:54,289 INFO L93 Difference]: Finished difference Result 212 states and 476 transitions. [2021-05-21 20:51:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:51:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:51:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:54,290 INFO L225 Difference]: With dead ends: 212 [2021-05-21 20:51:54,290 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 20:51:54,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:51:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 20:51:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-05-21 20:51:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-05-21 20:51:54,294 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-05-21 20:51:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:54,294 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-05-21 20:51:54,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-05-21 20:51:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:51:54,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:54,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:54,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:54,509 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-05-21 20:51:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:54,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921811569] [2021-05-21 20:51:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:54,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921811569] [2021-05-21 20:51:54,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921811569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:54,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490622421] [2021-05-21 20:51:54,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:54,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:51:54,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:51:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:54,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490622421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:54,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:54,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:51:54,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845559935] [2021-05-21 20:51:54,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:51:54,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:54,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:51:54,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:54,682 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:54,929 INFO L93 Difference]: Finished difference Result 368 states and 820 transitions. [2021-05-21 20:51:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:51:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:51:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:54,930 INFO L225 Difference]: With dead ends: 368 [2021-05-21 20:51:54,930 INFO L226 Difference]: Without dead ends: 326 [2021-05-21 20:51:54,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:51:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-21 20:51:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2021-05-21 20:51:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-05-21 20:51:54,936 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 22 [2021-05-21 20:51:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:54,937 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-05-21 20:51:54,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-05-21 20:51:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:51:54,937 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:54,937 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:55,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:51:55,153 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:55,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1909707008, now seen corresponding path program 3 times [2021-05-21 20:51:55,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:55,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464049455] [2021-05-21 20:51:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:55,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464049455] [2021-05-21 20:51:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464049455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453371496] [2021-05-21 20:51:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:55,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:51:55,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:51:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:55,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453371496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:55,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:55,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:51:55,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135465683] [2021-05-21 20:51:55,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:51:55,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:55,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:51:55,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:51:55,397 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:55,535 INFO L93 Difference]: Finished difference Result 284 states and 664 transitions. [2021-05-21 20:51:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:51:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:51:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:55,537 INFO L225 Difference]: With dead ends: 284 [2021-05-21 20:51:55,537 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:51:55,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:51:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:51:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 230. [2021-05-21 20:51:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.3973799126637556) internal successors, (549), 229 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 549 transitions. [2021-05-21 20:51:55,542 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 549 transitions. Word has length 22 [2021-05-21 20:51:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:55,542 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 549 transitions. [2021-05-21 20:51:55,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 549 transitions. [2021-05-21 20:51:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:55,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:55,543 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:55,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:55,758 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 4 times [2021-05-21 20:51:55,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:55,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133333001] [2021-05-21 20:51:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:55,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133333001] [2021-05-21 20:51:55,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133333001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846704235] [2021-05-21 20:51:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:51:55,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:55,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846704235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:55,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774900955] [2021-05-21 20:51:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:55,992 INFO L87 Difference]: Start difference. First operand 230 states and 549 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:56,170 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-05-21 20:51:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:51:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:56,172 INFO L225 Difference]: With dead ends: 300 [2021-05-21 20:51:56,172 INFO L226 Difference]: Without dead ends: 278 [2021-05-21 20:51:56,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:51:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-21 20:51:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2021-05-21 20:51:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-05-21 20:51:56,178 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-05-21 20:51:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:56,178 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-05-21 20:51:56,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-05-21 20:51:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:56,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:56,180 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:56,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:51:56,396 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:56,396 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 5 times [2021-05-21 20:51:56,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:56,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989199646] [2021-05-21 20:51:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:56,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:56,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989199646] [2021-05-21 20:51:56,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989199646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896983929] [2021-05-21 20:51:56,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:56,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:51:56,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:56,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896983929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:56,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:56,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430792565] [2021-05-21 20:51:56,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:56,669 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:56,896 INFO L93 Difference]: Finished difference Result 324 states and 768 transitions. [2021-05-21 20:51:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:51:56,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:56,898 INFO L225 Difference]: With dead ends: 324 [2021-05-21 20:51:56,898 INFO L226 Difference]: Without dead ends: 302 [2021-05-21 20:51:56,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:51:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-21 20:51:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-05-21 20:51:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-05-21 20:51:56,902 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-05-21 20:51:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:56,903 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-05-21 20:51:56,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-05-21 20:51:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:56,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:56,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 20:51:57,113 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 6 times [2021-05-21 20:51:57,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894017886] [2021-05-21 20:51:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894017886] [2021-05-21 20:51:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894017886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:57,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421221629] [2021-05-21 20:51:57,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:57,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:51:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421221629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:57,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:57,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:57,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638730666] [2021-05-21 20:51:57,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:57,318 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:57,562 INFO L93 Difference]: Finished difference Result 356 states and 840 transitions. [2021-05-21 20:51:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:51:57,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:57,565 INFO L225 Difference]: With dead ends: 356 [2021-05-21 20:51:57,565 INFO L226 Difference]: Without dead ends: 318 [2021-05-21 20:51:57,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:51:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-21 20:51:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 278. [2021-05-21 20:51:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-05-21 20:51:57,572 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-05-21 20:51:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:57,572 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-05-21 20:51:57,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-05-21 20:51:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:57,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:57,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:57,788 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 7 times [2021-05-21 20:51:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306802695] [2021-05-21 20:51:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306802695] [2021-05-21 20:51:57,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306802695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:57,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442474960] [2021-05-21 20:51:57,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442474960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:58,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126771821] [2021-05-21 20:51:58,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:58,043 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:58,236 INFO L93 Difference]: Finished difference Result 308 states and 732 transitions. [2021-05-21 20:51:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:51:58,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:58,238 INFO L225 Difference]: With dead ends: 308 [2021-05-21 20:51:58,238 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 20:51:58,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:51:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 20:51:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 278. [2021-05-21 20:51:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-05-21 20:51:58,243 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-05-21 20:51:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:58,243 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-05-21 20:51:58,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-05-21 20:51:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:58,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:58,244 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:58,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 20:51:58,460 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 8 times [2021-05-21 20:51:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:58,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237335763] [2021-05-21 20:51:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:58,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237335763] [2021-05-21 20:51:58,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237335763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807339056] [2021-05-21 20:51:58,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:58,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:51:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:58,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807339056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:58,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:58,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39620557] [2021-05-21 20:51:58,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:58,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:58,655 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:58,891 INFO L93 Difference]: Finished difference Result 348 states and 828 transitions. [2021-05-21 20:51:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:51:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:58,892 INFO L225 Difference]: With dead ends: 348 [2021-05-21 20:51:58,892 INFO L226 Difference]: Without dead ends: 326 [2021-05-21 20:51:58,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:51:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-21 20:51:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 294. [2021-05-21 20:51:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-05-21 20:51:58,897 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-05-21 20:51:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:58,898 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-05-21 20:51:58,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-05-21 20:51:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:58,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:58,898 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:59,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:59,105 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 9 times [2021-05-21 20:51:59,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:59,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953657363] [2021-05-21 20:51:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:59,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953657363] [2021-05-21 20:51:59,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953657363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:59,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769118131] [2021-05-21 20:51:59,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:59,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:51:59,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:59,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:59,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769118131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:59,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:59,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:59,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745949977] [2021-05-21 20:51:59,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:59,298 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:59,408 INFO L93 Difference]: Finished difference Result 324 states and 772 transitions. [2021-05-21 20:51:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:51:59,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:59,409 INFO L225 Difference]: With dead ends: 324 [2021-05-21 20:51:59,409 INFO L226 Difference]: Without dead ends: 310 [2021-05-21 20:51:59,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:51:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-21 20:51:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-05-21 20:51:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-05-21 20:51:59,414 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-05-21 20:51:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:59,414 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-05-21 20:51:59,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-05-21 20:51:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:59,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:59,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:59,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:59,631 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 10 times [2021-05-21 20:51:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:59,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809332491] [2021-05-21 20:51:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:59,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809332491] [2021-05-21 20:51:59,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809332491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:59,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740739952] [2021-05-21 20:51:59,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:59,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:51:59,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:51:59,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740739952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:59,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:59,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:51:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719495204] [2021-05-21 20:51:59,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:51:59,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:59,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:51:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:51:59,836 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:59,990 INFO L93 Difference]: Finished difference Result 340 states and 812 transitions. [2021-05-21 20:51:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:51:59,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:59,992 INFO L225 Difference]: With dead ends: 340 [2021-05-21 20:51:59,992 INFO L226 Difference]: Without dead ends: 326 [2021-05-21 20:51:59,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:51:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-21 20:51:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 286. [2021-05-21 20:51:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-05-21 20:51:59,996 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-05-21 20:51:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:59,996 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-05-21 20:51:59,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-05-21 20:51:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:59,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:59,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:00,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:00,213 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 11 times [2021-05-21 20:52:00,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:00,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657660663] [2021-05-21 20:52:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657660663] [2021-05-21 20:52:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657660663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152328156] [2021-05-21 20:52:00,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:00,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:00,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:52:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152328156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:00,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:52:00,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237725247] [2021-05-21 20:52:00,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:52:00,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:00,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:52:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:52:00,400 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:00,649 INFO L93 Difference]: Finished difference Result 356 states and 848 transitions. [2021-05-21 20:52:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:00,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:00,651 INFO L225 Difference]: With dead ends: 356 [2021-05-21 20:52:00,651 INFO L226 Difference]: Without dead ends: 334 [2021-05-21 20:52:00,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:52:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-21 20:52:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 294. [2021-05-21 20:52:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-05-21 20:52:00,655 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-05-21 20:52:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:00,656 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-05-21 20:52:00,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-05-21 20:52:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:00,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:00,656 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:00,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-21 20:52:00,869 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 12 times [2021-05-21 20:52:00,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:00,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571551983] [2021-05-21 20:52:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:00,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571551983] [2021-05-21 20:52:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571551983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886433081] [2021-05-21 20:52:00,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:00,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:52:00,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:52:00,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886433081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:01,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:01,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:52:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079024318] [2021-05-21 20:52:01,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:52:01,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:52:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:52:01,078 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:01,268 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-05-21 20:52:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:52:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:01,269 INFO L225 Difference]: With dead ends: 332 [2021-05-21 20:52:01,269 INFO L226 Difference]: Without dead ends: 318 [2021-05-21 20:52:01,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:52:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-21 20:52:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2021-05-21 20:52:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-05-21 20:52:01,274 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-05-21 20:52:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-05-21 20:52:01,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-05-21 20:52:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:01,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:01,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:01,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-21 20:52:01,475 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 13 times [2021-05-21 20:52:01,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:01,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453627490] [2021-05-21 20:52:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:01,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453627490] [2021-05-21 20:52:01,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453627490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:01,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405166324] [2021-05-21 20:52:01,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:52:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405166324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:01,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:01,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:52:01,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750815512] [2021-05-21 20:52:01,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:52:01,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:01,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:52:01,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:52:01,705 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:01,898 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-05-21 20:52:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:52:01,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:01,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:01,899 INFO L225 Difference]: With dead ends: 332 [2021-05-21 20:52:01,899 INFO L226 Difference]: Without dead ends: 310 [2021-05-21 20:52:01,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:52:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-21 20:52:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-05-21 20:52:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-05-21 20:52:01,904 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-05-21 20:52:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:01,904 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-05-21 20:52:01,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-05-21 20:52:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:01,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:01,905 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:02,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 20:52:02,122 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 14 times [2021-05-21 20:52:02,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:02,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546204599] [2021-05-21 20:52:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:02,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:02,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546204599] [2021-05-21 20:52:02,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546204599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:02,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339452769] [2021-05-21 20:52:02,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:02,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:52:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:02,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339452769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:02,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:02,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:52:02,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707848161] [2021-05-21 20:52:02,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:52:02,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:52:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:52:02,327 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:02,465 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-05-21 20:52:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:52:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:02,466 INFO L225 Difference]: With dead ends: 308 [2021-05-21 20:52:02,466 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 20:52:02,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 20:52:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-05-21 20:52:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-05-21 20:52:02,471 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-05-21 20:52:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:02,471 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-05-21 20:52:02,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-05-21 20:52:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:02,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:02,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:02,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 20:52:02,687 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:02,688 INFO L82 PathProgramCache]: Analyzing trace with hash -546283658, now seen corresponding path program 15 times [2021-05-21 20:52:02,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:02,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095086884] [2021-05-21 20:52:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:02,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:02,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095086884] [2021-05-21 20:52:02,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095086884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:02,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688769106] [2021-05-21 20:52:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:02,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:52:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:52:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:02,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688769106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:02,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:02,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:52:02,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896854535] [2021-05-21 20:52:02,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:52:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:52:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:52:02,873 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:03,003 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-05-21 20:52:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:52:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:03,004 INFO L225 Difference]: With dead ends: 300 [2021-05-21 20:52:03,004 INFO L226 Difference]: Without dead ends: 286 [2021-05-21 20:52:03,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-21 20:52:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-05-21 20:52:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-05-21 20:52:03,008 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-05-21 20:52:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:03,008 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-05-21 20:52:03,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-05-21 20:52:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:03,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:03,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:03,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:03,217 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash -358593358, now seen corresponding path program 16 times [2021-05-21 20:52:03,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:03,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090848332] [2021-05-21 20:52:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:03,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:03,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090848332] [2021-05-21 20:52:03,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090848332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:03,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282914970] [2021-05-21 20:52:03,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:03,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:52:03,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:03,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282914970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:03,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:03,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:52:03,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203811033] [2021-05-21 20:52:03,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:52:03,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:52:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:52:03,441 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:03,600 INFO L93 Difference]: Finished difference Result 340 states and 804 transitions. [2021-05-21 20:52:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:52:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:03,601 INFO L225 Difference]: With dead ends: 340 [2021-05-21 20:52:03,601 INFO L226 Difference]: Without dead ends: 318 [2021-05-21 20:52:03,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:52:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-21 20:52:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-05-21 20:52:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-05-21 20:52:03,605 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-05-21 20:52:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:03,605 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-05-21 20:52:03,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-05-21 20:52:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:03,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:03,606 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:03,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:03,821 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 17 times [2021-05-21 20:52:03,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:03,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430186954] [2021-05-21 20:52:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:03,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430186954] [2021-05-21 20:52:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430186954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521545554] [2021-05-21 20:52:03,881 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:03,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:52:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:03,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:04,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521545554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:04,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:04,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:04,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098843109] [2021-05-21 20:52:04,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:04,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:04,091 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:04,346 INFO L93 Difference]: Finished difference Result 388 states and 920 transitions. [2021-05-21 20:52:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:04,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:04,348 INFO L225 Difference]: With dead ends: 388 [2021-05-21 20:52:04,348 INFO L226 Difference]: Without dead ends: 358 [2021-05-21 20:52:04,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:52:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-21 20:52:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 278. [2021-05-21 20:52:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4007220216606497) internal successors, (665), 277 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 665 transitions. [2021-05-21 20:52:04,352 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 665 transitions. Word has length 26 [2021-05-21 20:52:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:04,352 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 665 transitions. [2021-05-21 20:52:04,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 665 transitions. [2021-05-21 20:52:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:04,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:04,352 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:04,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 20:52:04,567 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 18 times [2021-05-21 20:52:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:04,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459468352] [2021-05-21 20:52:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:04,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:04,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459468352] [2021-05-21 20:52:04,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459468352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:04,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399032037] [2021-05-21 20:52:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:04,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:52:04,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:04,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:04,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399032037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:04,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:04,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:04,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866597020] [2021-05-21 20:52:04,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:04,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:04,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:04,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:04,810 INFO L87 Difference]: Start difference. First operand 278 states and 665 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:05,074 INFO L93 Difference]: Finished difference Result 452 states and 1076 transitions. [2021-05-21 20:52:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:05,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:05,075 INFO L225 Difference]: With dead ends: 452 [2021-05-21 20:52:05,075 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 20:52:05,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:52:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 20:52:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2021-05-21 20:52:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-05-21 20:52:05,080 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-05-21 20:52:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:05,080 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-05-21 20:52:05,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-05-21 20:52:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:05,080 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:05,081 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:05,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:05,296 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:05,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 19 times [2021-05-21 20:52:05,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:05,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647122299] [2021-05-21 20:52:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:05,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:05,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647122299] [2021-05-21 20:52:05,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647122299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:05,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199334009] [2021-05-21 20:52:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:05,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:05,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199334009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:05,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:05,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658709823] [2021-05-21 20:52:05,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:05,540 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:05,805 INFO L93 Difference]: Finished difference Result 536 states and 1240 transitions. [2021-05-21 20:52:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:05,807 INFO L225 Difference]: With dead ends: 536 [2021-05-21 20:52:05,807 INFO L226 Difference]: Without dead ends: 494 [2021-05-21 20:52:05,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:52:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-05-21 20:52:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 342. [2021-05-21 20:52:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.43108504398827) internal successors, (829), 341 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 829 transitions. [2021-05-21 20:52:05,812 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 829 transitions. Word has length 26 [2021-05-21 20:52:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:05,812 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 829 transitions. [2021-05-21 20:52:05,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 829 transitions. [2021-05-21 20:52:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:05,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:05,813 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:06,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 20:52:06,028 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1803206464, now seen corresponding path program 20 times [2021-05-21 20:52:06,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:06,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147081050] [2021-05-21 20:52:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:06,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147081050] [2021-05-21 20:52:06,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147081050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921533201] [2021-05-21 20:52:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:06,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:06,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:06,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921533201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:06,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:06,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954261195] [2021-05-21 20:52:06,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:06,240 INFO L87 Difference]: Start difference. First operand 342 states and 829 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:06,428 INFO L93 Difference]: Finished difference Result 460 states and 1104 transitions. [2021-05-21 20:52:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:06,430 INFO L225 Difference]: With dead ends: 460 [2021-05-21 20:52:06,430 INFO L226 Difference]: Without dead ends: 430 [2021-05-21 20:52:06,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:52:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-21 20:52:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-05-21 20:52:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.432664756446991) internal successors, (849), 349 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 849 transitions. [2021-05-21 20:52:06,435 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 849 transitions. Word has length 26 [2021-05-21 20:52:06,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:06,435 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 849 transitions. [2021-05-21 20:52:06,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 849 transitions. [2021-05-21 20:52:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:06,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:06,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:06,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 20:52:06,649 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 21 times [2021-05-21 20:52:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:06,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799577687] [2021-05-21 20:52:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:06,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:06,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799577687] [2021-05-21 20:52:06,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799577687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:06,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723210051] [2021-05-21 20:52:06,702 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:06,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:52:06,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:06,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723210051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:06,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:06,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:06,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838767556] [2021-05-21 20:52:06,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:06,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:06,970 INFO L87 Difference]: Start difference. First operand 350 states and 849 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:07,254 INFO L93 Difference]: Finished difference Result 492 states and 1180 transitions. [2021-05-21 20:52:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:07,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:07,256 INFO L225 Difference]: With dead ends: 492 [2021-05-21 20:52:07,256 INFO L226 Difference]: Without dead ends: 454 [2021-05-21 20:52:07,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:52:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-21 20:52:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 358. [2021-05-21 20:52:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.434173669467787) internal successors, (869), 357 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 869 transitions. [2021-05-21 20:52:07,261 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 869 transitions. Word has length 26 [2021-05-21 20:52:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:07,261 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 869 transitions. [2021-05-21 20:52:07,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 869 transitions. [2021-05-21 20:52:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:07,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:07,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:07,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 20:52:07,477 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1044932168, now seen corresponding path program 22 times [2021-05-21 20:52:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:07,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774401035] [2021-05-21 20:52:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:07,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774401035] [2021-05-21 20:52:07,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774401035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680270025] [2021-05-21 20:52:07,524 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:52:07,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:07,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680270025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:07,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:07,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:07,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845805469] [2021-05-21 20:52:07,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:07,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:07,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:07,812 INFO L87 Difference]: Start difference. First operand 358 states and 869 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:08,078 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-05-21 20:52:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:08,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:08,080 INFO L225 Difference]: With dead ends: 548 [2021-05-21 20:52:08,080 INFO L226 Difference]: Without dead ends: 518 [2021-05-21 20:52:08,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-21 20:52:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2021-05-21 20:52:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.4395886889460154) internal successors, (949), 389 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 949 transitions. [2021-05-21 20:52:08,085 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 949 transitions. Word has length 26 [2021-05-21 20:52:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:08,085 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 949 transitions. [2021-05-21 20:52:08,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 949 transitions. [2021-05-21 20:52:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:08,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:08,086 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:08,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-21 20:52:08,305 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:08,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 23 times [2021-05-21 20:52:08,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:08,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286969697] [2021-05-21 20:52:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:08,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286969697] [2021-05-21 20:52:08,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286969697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484528042] [2021-05-21 20:52:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:08,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:08,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:08,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484528042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:08,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:08,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127037552] [2021-05-21 20:52:08,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:08,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:08,598 INFO L87 Difference]: Start difference. First operand 390 states and 949 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:08,944 INFO L93 Difference]: Finished difference Result 556 states and 1340 transitions. [2021-05-21 20:52:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:08,946 INFO L225 Difference]: With dead ends: 556 [2021-05-21 20:52:08,946 INFO L226 Difference]: Without dead ends: 518 [2021-05-21 20:52:08,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-21 20:52:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-05-21 20:52:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-05-21 20:52:08,951 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-05-21 20:52:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:08,951 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-05-21 20:52:08,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-05-21 20:52:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:08,952 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:08,952 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:09,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-21 20:52:09,161 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 24 times [2021-05-21 20:52:09,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:09,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631279382] [2021-05-21 20:52:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:09,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631279382] [2021-05-21 20:52:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631279382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572455776] [2021-05-21 20:52:09,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:09,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:52:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:09,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572455776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:09,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:09,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785631368] [2021-05-21 20:52:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:09,424 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:09,630 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-05-21 20:52:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:52:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:09,631 INFO L225 Difference]: With dead ends: 548 [2021-05-21 20:52:09,631 INFO L226 Difference]: Without dead ends: 518 [2021-05-21 20:52:09,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:52:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-21 20:52:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-05-21 20:52:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-05-21 20:52:09,636 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-05-21 20:52:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:09,637 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-05-21 20:52:09,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-05-21 20:52:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:09,637 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:09,637 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:09,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:09,852 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash 319483004, now seen corresponding path program 25 times [2021-05-21 20:52:09,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:09,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566817567] [2021-05-21 20:52:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:09,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:09,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566817567] [2021-05-21 20:52:09,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566817567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:09,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586266896] [2021-05-21 20:52:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:09,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:09,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:10,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586266896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:10,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:10,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:10,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281390323] [2021-05-21 20:52:10,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:10,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:10,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:10,114 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:10,327 INFO L93 Difference]: Finished difference Result 508 states and 1224 transitions. [2021-05-21 20:52:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:10,329 INFO L225 Difference]: With dead ends: 508 [2021-05-21 20:52:10,329 INFO L226 Difference]: Without dead ends: 478 [2021-05-21 20:52:10,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:52:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-21 20:52:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-05-21 20:52:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.4419753086419753) internal successors, (989), 405 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 989 transitions. [2021-05-21 20:52:10,334 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 989 transitions. Word has length 26 [2021-05-21 20:52:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:10,334 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 989 transitions. [2021-05-21 20:52:10,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 989 transitions. [2021-05-21 20:52:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:10,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:10,335 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:10,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-21 20:52:10,549 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 26 times [2021-05-21 20:52:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:10,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488654993] [2021-05-21 20:52:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:10,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:10,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488654993] [2021-05-21 20:52:10,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488654993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:10,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307836678] [2021-05-21 20:52:10,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:10,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:10,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307836678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:10,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:10,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:10,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741109988] [2021-05-21 20:52:10,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:10,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:10,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:10,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:10,791 INFO L87 Difference]: Start difference. First operand 406 states and 989 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:11,083 INFO L93 Difference]: Finished difference Result 548 states and 1320 transitions. [2021-05-21 20:52:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:11,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:11,084 INFO L225 Difference]: With dead ends: 548 [2021-05-21 20:52:11,084 INFO L226 Difference]: Without dead ends: 510 [2021-05-21 20:52:11,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:52:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-05-21 20:52:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 422. [2021-05-21 20:52:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4441805225653206) internal successors, (1029), 421 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1029 transitions. [2021-05-21 20:52:11,090 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1029 transitions. Word has length 26 [2021-05-21 20:52:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:11,090 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1029 transitions. [2021-05-21 20:52:11,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1029 transitions. [2021-05-21 20:52:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:11,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:11,090 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:11,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-05-21 20:52:11,294 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 27 times [2021-05-21 20:52:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:11,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781935900] [2021-05-21 20:52:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:11,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:11,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781935900] [2021-05-21 20:52:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781935900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:11,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86217809] [2021-05-21 20:52:11,339 INFO L93 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) [2021-05-21 20:52:11,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:52:11,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:11,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86217809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:11,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:11,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:11,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898314182] [2021-05-21 20:52:11,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:11,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:11,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:11,547 INFO L87 Difference]: Start difference. First operand 422 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:11,854 INFO L93 Difference]: Finished difference Result 588 states and 1420 transitions. [2021-05-21 20:52:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:11,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:11,856 INFO L225 Difference]: With dead ends: 588 [2021-05-21 20:52:11,856 INFO L226 Difference]: Without dead ends: 550 [2021-05-21 20:52:11,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-21 20:52:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 438. [2021-05-21 20:52:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.446224256292906) internal successors, (1069), 437 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1069 transitions. [2021-05-21 20:52:11,861 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1069 transitions. Word has length 26 [2021-05-21 20:52:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:11,861 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1069 transitions. [2021-05-21 20:52:11,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1069 transitions. [2021-05-21 20:52:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:11,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:11,862 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:12,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:12,077 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 28 times [2021-05-21 20:52:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:12,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036016985] [2021-05-21 20:52:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:12,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036016985] [2021-05-21 20:52:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036016985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151807738] [2021-05-21 20:52:12,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:12,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:12,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:12,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151807738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:12,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:12,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:12,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091601182] [2021-05-21 20:52:12,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:12,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:12,332 INFO L87 Difference]: Start difference. First operand 438 states and 1069 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:12,632 INFO L93 Difference]: Finished difference Result 720 states and 1704 transitions. [2021-05-21 20:52:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:12,634 INFO L225 Difference]: With dead ends: 720 [2021-05-21 20:52:12,634 INFO L226 Difference]: Without dead ends: 678 [2021-05-21 20:52:12,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 346.0ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-05-21 20:52:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 446. [2021-05-21 20:52:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.447191011235955) internal successors, (1089), 445 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1089 transitions. [2021-05-21 20:52:12,639 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1089 transitions. Word has length 26 [2021-05-21 20:52:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:12,639 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1089 transitions. [2021-05-21 20:52:12,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1089 transitions. [2021-05-21 20:52:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:12,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:12,640 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:12,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-05-21 20:52:12,854 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1675418936, now seen corresponding path program 29 times [2021-05-21 20:52:12,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:12,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953826191] [2021-05-21 20:52:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:12,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:12,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953826191] [2021-05-21 20:52:12,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953826191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:12,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333823730] [2021-05-21 20:52:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:12,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:13,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333823730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:13,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:13,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:13,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293219219] [2021-05-21 20:52:13,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:13,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:13,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:13,094 INFO L87 Difference]: Start difference. First operand 446 states and 1089 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:13,335 INFO L93 Difference]: Finished difference Result 634 states and 1499 transitions. [2021-05-21 20:52:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:13,337 INFO L225 Difference]: With dead ends: 634 [2021-05-21 20:52:13,337 INFO L226 Difference]: Without dead ends: 604 [2021-05-21 20:52:13,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:52:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-05-21 20:52:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 470. [2021-05-21 20:52:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.458422174840085) internal successors, (1153), 469 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1153 transitions. [2021-05-21 20:52:13,356 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1153 transitions. Word has length 26 [2021-05-21 20:52:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:13,356 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1153 transitions. [2021-05-21 20:52:13,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1153 transitions. [2021-05-21 20:52:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:13,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:13,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:13,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:13,572 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1238039736, now seen corresponding path program 30 times [2021-05-21 20:52:13,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:13,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99057461] [2021-05-21 20:52:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:13,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99057461] [2021-05-21 20:52:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99057461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498306634] [2021-05-21 20:52:13,630 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:13,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:52:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498306634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:13,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:13,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:13,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44522468] [2021-05-21 20:52:13,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:13,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:13,836 INFO L87 Difference]: Start difference. First operand 470 states and 1153 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:14,137 INFO L93 Difference]: Finished difference Result 636 states and 1548 transitions. [2021-05-21 20:52:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:14,139 INFO L225 Difference]: With dead ends: 636 [2021-05-21 20:52:14,139 INFO L226 Difference]: Without dead ends: 606 [2021-05-21 20:52:14,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:52:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-05-21 20:52:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 486. [2021-05-21 20:52:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-05-21 20:52:14,144 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-05-21 20:52:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:14,144 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-05-21 20:52:14,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-05-21 20:52:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:14,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:14,145 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:14,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-05-21 20:52:14,357 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1700991628, now seen corresponding path program 31 times [2021-05-21 20:52:14,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:14,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400857534] [2021-05-21 20:52:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:14,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:14,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400857534] [2021-05-21 20:52:14,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400857534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:14,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640333127] [2021-05-21 20:52:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:14,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640333127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:14,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:14,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:52:14,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990745127] [2021-05-21 20:52:14,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:52:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:52:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:52:14,602 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:14,912 INFO L93 Difference]: Finished difference Result 604 states and 1468 transitions. [2021-05-21 20:52:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-21 20:52:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:14,914 INFO L225 Difference]: With dead ends: 604 [2021-05-21 20:52:14,914 INFO L226 Difference]: Without dead ends: 574 [2021-05-21 20:52:14,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:52:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-05-21 20:52:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2021-05-21 20:52:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-05-21 20:52:14,920 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-05-21 20:52:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:14,920 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-05-21 20:52:14,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-05-21 20:52:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:14,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:14,920 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:15,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-05-21 20:52:15,136 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:15,136 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-05-21 20:52:15,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:15,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946718498] [2021-05-21 20:52:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:15,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:15,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946718498] [2021-05-21 20:52:15,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946718498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:15,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138283845] [2021-05-21 20:52:15,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:15,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:52:15,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:52:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:15,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138283845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:15,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:15,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:15,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899279952] [2021-05-21 20:52:15,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:15,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:15,467 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:15,783 INFO L93 Difference]: Finished difference Result 554 states and 1340 transitions. [2021-05-21 20:52:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:52:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:15,785 INFO L225 Difference]: With dead ends: 554 [2021-05-21 20:52:15,785 INFO L226 Difference]: Without dead ends: 524 [2021-05-21 20:52:15,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:52:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-21 20:52:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2021-05-21 20:52:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.4549098196392785) internal successors, (1225), 499 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1225 transitions. [2021-05-21 20:52:15,790 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1225 transitions. Word has length 28 [2021-05-21 20:52:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:15,790 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1225 transitions. [2021-05-21 20:52:15,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1225 transitions. [2021-05-21 20:52:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:15,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:15,790 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:15,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:15,991 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 32 times [2021-05-21 20:52:15,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:15,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598034553] [2021-05-21 20:52:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:16,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598034553] [2021-05-21 20:52:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598034553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081036873] [2021-05-21 20:52:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:16,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:16,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:16,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:16,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081036873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:16,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:16,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:16,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665524124] [2021-05-21 20:52:16,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:16,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:16,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:16,332 INFO L87 Difference]: Start difference. First operand 500 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:16,704 INFO L93 Difference]: Finished difference Result 650 states and 1584 transitions. [2021-05-21 20:52:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:16,706 INFO L225 Difference]: With dead ends: 650 [2021-05-21 20:52:16,707 INFO L226 Difference]: Without dead ends: 628 [2021-05-21 20:52:16,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-05-21 20:52:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 508. [2021-05-21 20:52:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.455621301775148) internal successors, (1245), 507 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1245 transitions. [2021-05-21 20:52:16,712 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1245 transitions. Word has length 28 [2021-05-21 20:52:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:16,712 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1245 transitions. [2021-05-21 20:52:16,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1245 transitions. [2021-05-21 20:52:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:16,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:16,713 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-05-21 20:52:16,928 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash -945290426, now seen corresponding path program 33 times [2021-05-21 20:52:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:16,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263309289] [2021-05-21 20:52:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:16,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263309289] [2021-05-21 20:52:16,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263309289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724741243] [2021-05-21 20:52:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:17,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:52:17,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:17,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:17,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724741243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:17,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:17,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:17,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099016916] [2021-05-21 20:52:17,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:17,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:17,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:17,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:17,196 INFO L87 Difference]: Start difference. First operand 508 states and 1245 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:17,571 INFO L93 Difference]: Finished difference Result 706 states and 1716 transitions. [2021-05-21 20:52:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:52:17,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:17,574 INFO L225 Difference]: With dead ends: 706 [2021-05-21 20:52:17,574 INFO L226 Difference]: Without dead ends: 668 [2021-05-21 20:52:17,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:52:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-05-21 20:52:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 556. [2021-05-21 20:52:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-05-21 20:52:17,582 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-05-21 20:52:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:17,583 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-05-21 20:52:17,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-05-21 20:52:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:17,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:17,584 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:17,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:17,794 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 34 times [2021-05-21 20:52:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:17,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87583282] [2021-05-21 20:52:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:17,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:17,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87583282] [2021-05-21 20:52:17,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87583282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:17,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955490753] [2021-05-21 20:52:17,901 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:17,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:18,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955490753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:18,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:18,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:18,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855481203] [2021-05-21 20:52:18,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:18,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:18,129 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:18,422 INFO L93 Difference]: Finished difference Result 674 states and 1636 transitions. [2021-05-21 20:52:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:18,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:18,424 INFO L225 Difference]: With dead ends: 674 [2021-05-21 20:52:18,424 INFO L226 Difference]: Without dead ends: 636 [2021-05-21 20:52:18,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-05-21 20:52:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 556. [2021-05-21 20:52:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-05-21 20:52:18,430 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-05-21 20:52:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:18,430 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-05-21 20:52:18,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-05-21 20:52:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:18,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:18,431 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:18,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-05-21 20:52:18,640 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 35 times [2021-05-21 20:52:18,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:18,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969953550] [2021-05-21 20:52:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:18,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:18,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969953550] [2021-05-21 20:52:18,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969953550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:18,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489080947] [2021-05-21 20:52:18,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:18,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:52:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:19,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489080947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:19,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:19,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:19,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825472720] [2021-05-21 20:52:19,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:19,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:19,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:19,058 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:19,392 INFO L93 Difference]: Finished difference Result 714 states and 1740 transitions. [2021-05-21 20:52:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:19,394 INFO L225 Difference]: With dead ends: 714 [2021-05-21 20:52:19,394 INFO L226 Difference]: Without dead ends: 684 [2021-05-21 20:52:19,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-05-21 20:52:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 564. [2021-05-21 20:52:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-05-21 20:52:19,400 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-05-21 20:52:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:19,400 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-05-21 20:52:19,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-05-21 20:52:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:19,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:19,400 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:19,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:19,601 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 36 times [2021-05-21 20:52:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:19,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699061678] [2021-05-21 20:52:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:19,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:19,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699061678] [2021-05-21 20:52:19,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699061678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:19,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927972056] [2021-05-21 20:52:19,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:19,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:52:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:19,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927972056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:19,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:19,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578391247] [2021-05-21 20:52:19,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:19,914 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:20,321 INFO L93 Difference]: Finished difference Result 722 states and 1760 transitions. [2021-05-21 20:52:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:20,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:20,323 INFO L225 Difference]: With dead ends: 722 [2021-05-21 20:52:20,323 INFO L226 Difference]: Without dead ends: 692 [2021-05-21 20:52:20,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-05-21 20:52:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 572. [2021-05-21 20:52:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.460595446584939) internal successors, (1405), 571 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1405 transitions. [2021-05-21 20:52:20,329 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1405 transitions. Word has length 28 [2021-05-21 20:52:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:20,329 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1405 transitions. [2021-05-21 20:52:20,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1405 transitions. [2021-05-21 20:52:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:20,330 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:20,330 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:20,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:20,535 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:20,535 INFO L82 PathProgramCache]: Analyzing trace with hash 451849338, now seen corresponding path program 37 times [2021-05-21 20:52:20,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:20,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012777389] [2021-05-21 20:52:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:20,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:20,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012777389] [2021-05-21 20:52:20,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012777389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:20,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689614790] [2021-05-21 20:52:20,602 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:20,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:20,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689614790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:20,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:20,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:20,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643212661] [2021-05-21 20:52:20,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:20,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:20,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:20,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:20,818 INFO L87 Difference]: Start difference. First operand 572 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:21,109 INFO L93 Difference]: Finished difference Result 658 states and 1604 transitions. [2021-05-21 20:52:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:21,111 INFO L225 Difference]: With dead ends: 658 [2021-05-21 20:52:21,111 INFO L226 Difference]: Without dead ends: 636 [2021-05-21 20:52:21,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:52:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-05-21 20:52:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-05-21 20:52:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-05-21 20:52:21,117 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-05-21 20:52:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:21,117 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-05-21 20:52:21,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-05-21 20:52:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:21,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:21,118 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:21,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-05-21 20:52:21,319 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 280163074, now seen corresponding path program 38 times [2021-05-21 20:52:21,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:21,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783782122] [2021-05-21 20:52:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:21,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:21,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783782122] [2021-05-21 20:52:21,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783782122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424859102] [2021-05-21 20:52:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:21,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:21,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:21,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424859102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:21,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:21,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:21,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673593505] [2021-05-21 20:52:21,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:21,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:21,633 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:22,056 INFO L93 Difference]: Finished difference Result 786 states and 1916 transitions. [2021-05-21 20:52:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:52:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:22,058 INFO L225 Difference]: With dead ends: 786 [2021-05-21 20:52:22,058 INFO L226 Difference]: Without dead ends: 748 [2021-05-21 20:52:22,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:52:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-21 20:52:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 604. [2021-05-21 20:52:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.462686567164179) internal successors, (1485), 603 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1485 transitions. [2021-05-21 20:52:22,064 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1485 transitions. Word has length 28 [2021-05-21 20:52:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:22,064 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1485 transitions. [2021-05-21 20:52:22,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1485 transitions. [2021-05-21 20:52:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:22,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:22,065 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:22,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:22,266 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 39 times [2021-05-21 20:52:22,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:22,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798958126] [2021-05-21 20:52:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:22,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798958126] [2021-05-21 20:52:22,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798958126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498395366] [2021-05-21 20:52:22,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:22,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:52:22,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:22,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:22,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498395366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:22,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:22,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:22,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139830721] [2021-05-21 20:52:22,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:22,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:22,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:22,597 INFO L87 Difference]: Start difference. First operand 604 states and 1485 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:22,922 INFO L93 Difference]: Finished difference Result 754 states and 1840 transitions. [2021-05-21 20:52:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:22,924 INFO L225 Difference]: With dead ends: 754 [2021-05-21 20:52:22,924 INFO L226 Difference]: Without dead ends: 724 [2021-05-21 20:52:22,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-05-21 20:52:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 612. [2021-05-21 20:52:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-05-21 20:52:22,931 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-05-21 20:52:22,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:22,931 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-05-21 20:52:22,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-05-21 20:52:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:22,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:22,932 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:23,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-05-21 20:52:23,132 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:23,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1726991738, now seen corresponding path program 40 times [2021-05-21 20:52:23,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:23,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562112814] [2021-05-21 20:52:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:23,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562112814] [2021-05-21 20:52:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562112814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777453541] [2021-05-21 20:52:23,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:23,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:23,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777453541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:23,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:23,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:23,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173851355] [2021-05-21 20:52:23,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:23,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:23,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:23,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:23,426 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:23,747 INFO L93 Difference]: Finished difference Result 738 states and 1804 transitions. [2021-05-21 20:52:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:23,749 INFO L225 Difference]: With dead ends: 738 [2021-05-21 20:52:23,749 INFO L226 Difference]: Without dead ends: 716 [2021-05-21 20:52:23,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:52:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-05-21 20:52:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 588. [2021-05-21 20:52:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4616695059625213) internal successors, (1445), 587 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1445 transitions. [2021-05-21 20:52:23,755 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1445 transitions. Word has length 28 [2021-05-21 20:52:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:23,755 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1445 transitions. [2021-05-21 20:52:23,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1445 transitions. [2021-05-21 20:52:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:23,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:23,756 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:23,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:23,961 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 41 times [2021-05-21 20:52:23,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:23,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059440142] [2021-05-21 20:52:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:24,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:24,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059440142] [2021-05-21 20:52:24,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059440142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:24,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353500604] [2021-05-21 20:52:24,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:24,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:52:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353500604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:24,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:24,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781672225] [2021-05-21 20:52:24,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:24,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:24,383 INFO L87 Difference]: Start difference. First operand 588 states and 1445 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:24,823 INFO L93 Difference]: Finished difference Result 746 states and 1824 transitions. [2021-05-21 20:52:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:24,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:24,824 INFO L225 Difference]: With dead ends: 746 [2021-05-21 20:52:24,824 INFO L226 Difference]: Without dead ends: 724 [2021-05-21 20:52:24,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-05-21 20:52:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 620. [2021-05-21 20:52:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4636510500807756) internal successors, (1525), 619 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1525 transitions. [2021-05-21 20:52:24,830 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1525 transitions. Word has length 28 [2021-05-21 20:52:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:24,830 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1525 transitions. [2021-05-21 20:52:24,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1525 transitions. [2021-05-21 20:52:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:24,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:24,831 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:25,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:25,045 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1388654202, now seen corresponding path program 42 times [2021-05-21 20:52:25,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:25,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139078937] [2021-05-21 20:52:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:25,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:25,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139078937] [2021-05-21 20:52:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139078937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:25,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259857867] [2021-05-21 20:52:25,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:25,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:52:25,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:25,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259857867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:25,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:25,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748132956] [2021-05-21 20:52:25,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:25,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:25,377 INFO L87 Difference]: Start difference. First operand 620 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:25,727 INFO L93 Difference]: Finished difference Result 770 states and 1884 transitions. [2021-05-21 20:52:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:25,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:25,728 INFO L225 Difference]: With dead ends: 770 [2021-05-21 20:52:25,728 INFO L226 Difference]: Without dead ends: 748 [2021-05-21 20:52:25,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-21 20:52:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 612. [2021-05-21 20:52:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-05-21 20:52:25,735 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-05-21 20:52:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:25,735 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-05-21 20:52:25,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-05-21 20:52:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:25,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:25,736 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:25,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-05-21 20:52:25,937 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash -238558138, now seen corresponding path program 43 times [2021-05-21 20:52:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:25,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290952851] [2021-05-21 20:52:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:26,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290952851] [2021-05-21 20:52:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290952851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909931159] [2021-05-21 20:52:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:26,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909931159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:26,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:26,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:26,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137205010] [2021-05-21 20:52:26,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:26,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:26,265 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:26,774 INFO L93 Difference]: Finished difference Result 746 states and 1820 transitions. [2021-05-21 20:52:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:52:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:26,775 INFO L225 Difference]: With dead ends: 746 [2021-05-21 20:52:26,775 INFO L226 Difference]: Without dead ends: 716 [2021-05-21 20:52:26,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:52:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-05-21 20:52:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 660. [2021-05-21 20:52:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-05-21 20:52:26,781 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-05-21 20:52:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:26,781 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-05-21 20:52:26,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-05-21 20:52:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:26,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:26,782 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:26,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-21 20:52:26,983 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 44 times [2021-05-21 20:52:26,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:26,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930812208] [2021-05-21 20:52:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:27,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930812208] [2021-05-21 20:52:27,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930812208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124935611] [2021-05-21 20:52:27,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:27,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124935611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:27,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:27,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:27,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84761604] [2021-05-21 20:52:27,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:27,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:27,281 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:27,606 INFO L93 Difference]: Finished difference Result 786 states and 1920 transitions. [2021-05-21 20:52:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:27,608 INFO L225 Difference]: With dead ends: 786 [2021-05-21 20:52:27,608 INFO L226 Difference]: Without dead ends: 756 [2021-05-21 20:52:27,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-05-21 20:52:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 660. [2021-05-21 20:52:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-05-21 20:52:27,615 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-05-21 20:52:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:27,615 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-05-21 20:52:27,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-05-21 20:52:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:27,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:27,617 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:27,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:27,825 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 45 times [2021-05-21 20:52:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:27,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571134436] [2021-05-21 20:52:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:27,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:27,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571134436] [2021-05-21 20:52:27,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571134436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:27,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853142962] [2021-05-21 20:52:27,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:27,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:52:27,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:27,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:28,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853142962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:28,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:28,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:28,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491886771] [2021-05-21 20:52:28,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:28,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:28,173 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:28,556 INFO L93 Difference]: Finished difference Result 810 states and 1984 transitions. [2021-05-21 20:52:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:28,557 INFO L225 Difference]: With dead ends: 810 [2021-05-21 20:52:28,557 INFO L226 Difference]: Without dead ends: 788 [2021-05-21 20:52:28,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-05-21 20:52:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-05-21 20:52:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.4662668665667167) internal successors, (1645), 667 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1645 transitions. [2021-05-21 20:52:28,564 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1645 transitions. Word has length 28 [2021-05-21 20:52:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:28,564 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 1645 transitions. [2021-05-21 20:52:28,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1645 transitions. [2021-05-21 20:52:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:28,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:28,565 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:28,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-05-21 20:52:28,780 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 46 times [2021-05-21 20:52:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626153005] [2021-05-21 20:52:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:28,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626153005] [2021-05-21 20:52:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626153005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914195298] [2021-05-21 20:52:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:28,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:28,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:29,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914195298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:29,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:29,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:29,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144192415] [2021-05-21 20:52:29,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:29,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:29,155 INFO L87 Difference]: Start difference. First operand 668 states and 1645 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:29,511 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-05-21 20:52:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:29,513 INFO L225 Difference]: With dead ends: 794 [2021-05-21 20:52:29,513 INFO L226 Difference]: Without dead ends: 756 [2021-05-21 20:52:29,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-05-21 20:52:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 684. [2021-05-21 20:52:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-05-21 20:52:29,520 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-05-21 20:52:29,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:29,520 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-05-21 20:52:29,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-05-21 20:52:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:29,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:29,521 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:29,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-05-21 20:52:29,721 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 47 times [2021-05-21 20:52:29,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:29,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276967528] [2021-05-21 20:52:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:29,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276967528] [2021-05-21 20:52:29,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276967528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299740573] [2021-05-21 20:52:29,798 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:29,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299740573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:30,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:30,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:30,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513510375] [2021-05-21 20:52:30,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:30,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:30,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:30,057 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:30,404 INFO L93 Difference]: Finished difference Result 802 states and 1964 transitions. [2021-05-21 20:52:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:30,405 INFO L225 Difference]: With dead ends: 802 [2021-05-21 20:52:30,405 INFO L226 Difference]: Without dead ends: 780 [2021-05-21 20:52:30,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-05-21 20:52:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 692. [2021-05-21 20:52:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-05-21 20:52:30,412 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-05-21 20:52:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:30,412 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-05-21 20:52:30,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-05-21 20:52:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:30,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:30,413 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:30,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-05-21 20:52:30,613 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -285003654, now seen corresponding path program 48 times [2021-05-21 20:52:30,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:30,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475029672] [2021-05-21 20:52:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:30,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:30,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475029672] [2021-05-21 20:52:30,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475029672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:30,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623670974] [2021-05-21 20:52:30,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:30,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:52:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:30,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623670974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:30,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:30,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:30,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096604857] [2021-05-21 20:52:30,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:30,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:30,969 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:31,312 INFO L93 Difference]: Finished difference Result 834 states and 2044 transitions. [2021-05-21 20:52:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:31,313 INFO L225 Difference]: With dead ends: 834 [2021-05-21 20:52:31,313 INFO L226 Difference]: Without dead ends: 812 [2021-05-21 20:52:31,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-05-21 20:52:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-05-21 20:52:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-05-21 20:52:31,321 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-05-21 20:52:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:31,321 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-05-21 20:52:31,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-05-21 20:52:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:31,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:31,322 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:31,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:31,537 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 49 times [2021-05-21 20:52:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:31,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50463790] [2021-05-21 20:52:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:31,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50463790] [2021-05-21 20:52:31,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50463790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324885731] [2021-05-21 20:52:31,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:31,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:31,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:31,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324885731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:31,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:31,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164626767] [2021-05-21 20:52:31,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:31,884 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:32,271 INFO L93 Difference]: Finished difference Result 826 states and 2016 transitions. [2021-05-21 20:52:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:32,273 INFO L225 Difference]: With dead ends: 826 [2021-05-21 20:52:32,273 INFO L226 Difference]: Without dead ends: 788 [2021-05-21 20:52:32,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-05-21 20:52:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 684. [2021-05-21 20:52:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-05-21 20:52:32,283 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-05-21 20:52:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:32,284 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-05-21 20:52:32,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-05-21 20:52:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:32,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:32,284 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:32,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:32,485 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 50 times [2021-05-21 20:52:32,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:32,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809778639] [2021-05-21 20:52:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:32,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:32,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809778639] [2021-05-21 20:52:32,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809778639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:32,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010076463] [2021-05-21 20:52:32,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:32,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:32,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:32,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010076463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:32,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:32,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316209327] [2021-05-21 20:52:32,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:32,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:32,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:32,757 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:33,024 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-05-21 20:52:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:33,025 INFO L225 Difference]: With dead ends: 794 [2021-05-21 20:52:33,025 INFO L226 Difference]: Without dead ends: 756 [2021-05-21 20:52:33,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-05-21 20:52:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-05-21 20:52:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-05-21 20:52:33,032 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-05-21 20:52:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:33,032 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-05-21 20:52:33,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-05-21 20:52:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:33,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:33,033 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:33,248 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 51 times [2021-05-21 20:52:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:33,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246736436] [2021-05-21 20:52:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:33,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:33,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246736436] [2021-05-21 20:52:33,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246736436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:33,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399298866] [2021-05-21 20:52:33,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:33,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:52:33,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:33,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:33,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399298866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:33,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:33,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:33,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499976852] [2021-05-21 20:52:33,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:33,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:33,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:33,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:33,564 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:33,950 INFO L93 Difference]: Finished difference Result 842 states and 2052 transitions. [2021-05-21 20:52:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:33,950 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:33,951 INFO L225 Difference]: With dead ends: 842 [2021-05-21 20:52:33,951 INFO L226 Difference]: Without dead ends: 796 [2021-05-21 20:52:33,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-05-21 20:52:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 708. [2021-05-21 20:52:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.468175388967468) internal successors, (1745), 707 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1745 transitions. [2021-05-21 20:52:33,958 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1745 transitions. Word has length 28 [2021-05-21 20:52:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:33,958 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 1745 transitions. [2021-05-21 20:52:33,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1745 transitions. [2021-05-21 20:52:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:33,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:33,959 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:34,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-21 20:52:34,159 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 52 times [2021-05-21 20:52:34,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:34,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118187580] [2021-05-21 20:52:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:34,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:34,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118187580] [2021-05-21 20:52:34,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118187580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:34,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385721440] [2021-05-21 20:52:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:34,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:34,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:34,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:34,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385721440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:34,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:34,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:34,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257110325] [2021-05-21 20:52:34,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:34,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:34,475 INFO L87 Difference]: Start difference. First operand 708 states and 1745 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:34,771 INFO L93 Difference]: Finished difference Result 818 states and 2004 transitions. [2021-05-21 20:52:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:34,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:34,772 INFO L225 Difference]: With dead ends: 818 [2021-05-21 20:52:34,772 INFO L226 Difference]: Without dead ends: 796 [2021-05-21 20:52:34,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-05-21 20:52:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-05-21 20:52:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-05-21 20:52:34,779 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-05-21 20:52:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:34,779 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-05-21 20:52:34,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-05-21 20:52:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:34,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:34,780 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:34,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:34,996 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 53 times [2021-05-21 20:52:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:34,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068363014] [2021-05-21 20:52:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:35,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:35,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068363014] [2021-05-21 20:52:35,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068363014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:35,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371457314] [2021-05-21 20:52:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:35,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:35,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:35,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371457314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:35,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:35,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353108826] [2021-05-21 20:52:35,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:35,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:35,292 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:35,619 INFO L93 Difference]: Finished difference Result 850 states and 2080 transitions. [2021-05-21 20:52:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:35,620 INFO L225 Difference]: With dead ends: 850 [2021-05-21 20:52:35,620 INFO L226 Difference]: Without dead ends: 820 [2021-05-21 20:52:35,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-05-21 20:52:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 716. [2021-05-21 20:52:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-05-21 20:52:35,627 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-05-21 20:52:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:35,627 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-05-21 20:52:35,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-05-21 20:52:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:35,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:35,628 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:35,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:35,843 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 54 times [2021-05-21 20:52:35,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:35,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433241008] [2021-05-21 20:52:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:35,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:35,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433241008] [2021-05-21 20:52:35,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433241008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:35,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010643009] [2021-05-21 20:52:35,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:35,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:52:35,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:35,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010643009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:36,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:36,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:36,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294065507] [2021-05-21 20:52:36,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:36,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:36,196 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:36,577 INFO L93 Difference]: Finished difference Result 866 states and 2120 transitions. [2021-05-21 20:52:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:36,579 INFO L225 Difference]: With dead ends: 866 [2021-05-21 20:52:36,579 INFO L226 Difference]: Without dead ends: 836 [2021-05-21 20:52:36,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-05-21 20:52:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 732. [2021-05-21 20:52:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-05-21 20:52:36,586 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-05-21 20:52:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:36,586 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-05-21 20:52:36,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-05-21 20:52:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:36,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:36,587 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:36,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:36,801 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 55 times [2021-05-21 20:52:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624559413] [2021-05-21 20:52:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:36,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624559413] [2021-05-21 20:52:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624559413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440761944] [2021-05-21 20:52:36,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:37,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440761944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:37,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:37,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784162929] [2021-05-21 20:52:37,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:37,129 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:37,483 INFO L93 Difference]: Finished difference Result 890 states and 2184 transitions. [2021-05-21 20:52:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:37,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:37,485 INFO L225 Difference]: With dead ends: 890 [2021-05-21 20:52:37,485 INFO L226 Difference]: Without dead ends: 868 [2021-05-21 20:52:37,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:37,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-05-21 20:52:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 732. [2021-05-21 20:52:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-05-21 20:52:37,505 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-05-21 20:52:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:37,505 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-05-21 20:52:37,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-05-21 20:52:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:37,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:37,506 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:37,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:37,721 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 56 times [2021-05-21 20:52:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:37,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379684643] [2021-05-21 20:52:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:37,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379684643] [2021-05-21 20:52:37,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379684643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548559403] [2021-05-21 20:52:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:37,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:37,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:38,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548559403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:38,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:38,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886883336] [2021-05-21 20:52:38,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:38,026 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:38,302 INFO L93 Difference]: Finished difference Result 882 states and 2156 transitions. [2021-05-21 20:52:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:38,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:38,303 INFO L225 Difference]: With dead ends: 882 [2021-05-21 20:52:38,303 INFO L226 Difference]: Without dead ends: 844 [2021-05-21 20:52:38,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-05-21 20:52:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 748. [2021-05-21 20:52:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-05-21 20:52:38,310 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-05-21 20:52:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:38,310 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-05-21 20:52:38,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-05-21 20:52:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:38,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:38,311 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:38,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:38,526 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 57 times [2021-05-21 20:52:38,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:38,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202657399] [2021-05-21 20:52:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:38,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202657399] [2021-05-21 20:52:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202657399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081492937] [2021-05-21 20:52:38,609 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:38,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:52:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:38,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081492937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:38,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:38,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:38,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638105241] [2021-05-21 20:52:38,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:38,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:38,916 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:39,273 INFO L93 Difference]: Finished difference Result 898 states and 2192 transitions. [2021-05-21 20:52:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:39,274 INFO L225 Difference]: With dead ends: 898 [2021-05-21 20:52:39,274 INFO L226 Difference]: Without dead ends: 852 [2021-05-21 20:52:39,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-05-21 20:52:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 748. [2021-05-21 20:52:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-05-21 20:52:39,281 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-05-21 20:52:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:39,281 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-05-21 20:52:39,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-05-21 20:52:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:39,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:39,282 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:39,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-05-21 20:52:39,486 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1967831874, now seen corresponding path program 58 times [2021-05-21 20:52:39,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:39,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716375363] [2021-05-21 20:52:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:39,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:39,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716375363] [2021-05-21 20:52:39,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716375363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:39,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081397991] [2021-05-21 20:52:39,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:39,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:39,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:39,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:39,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081397991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:39,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:39,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:39,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060531165] [2021-05-21 20:52:39,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:39,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:39,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:39,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:39,830 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:40,180 INFO L93 Difference]: Finished difference Result 874 states and 2144 transitions. [2021-05-21 20:52:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:40,181 INFO L225 Difference]: With dead ends: 874 [2021-05-21 20:52:40,181 INFO L226 Difference]: Without dead ends: 852 [2021-05-21 20:52:40,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-05-21 20:52:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 740. [2021-05-21 20:52:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.469553450608931) internal successors, (1825), 739 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1825 transitions. [2021-05-21 20:52:40,188 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1825 transitions. Word has length 28 [2021-05-21 20:52:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:40,188 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1825 transitions. [2021-05-21 20:52:40,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1825 transitions. [2021-05-21 20:52:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:40,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:40,189 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:40,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-05-21 20:52:40,389 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:40,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1175607874, now seen corresponding path program 59 times [2021-05-21 20:52:40,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:40,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369077432] [2021-05-21 20:52:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:40,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:40,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369077432] [2021-05-21 20:52:40,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369077432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:40,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634022815] [2021-05-21 20:52:40,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:40,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:40,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634022815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:40,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:40,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617600611] [2021-05-21 20:52:40,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:40,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:40,727 INFO L87 Difference]: Start difference. First operand 740 states and 1825 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:41,112 INFO L93 Difference]: Finished difference Result 858 states and 2100 transitions. [2021-05-21 20:52:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:41,112 INFO L225 Difference]: With dead ends: 858 [2021-05-21 20:52:41,113 INFO L226 Difference]: Without dead ends: 828 [2021-05-21 20:52:41,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:52:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-05-21 20:52:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 716. [2021-05-21 20:52:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-05-21 20:52:41,119 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-05-21 20:52:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:41,119 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-05-21 20:52:41,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-05-21 20:52:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:41,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:41,120 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:41,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-05-21 20:52:41,329 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1970549754, now seen corresponding path program 60 times [2021-05-21 20:52:41,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:41,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980085680] [2021-05-21 20:52:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:41,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:41,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980085680] [2021-05-21 20:52:41,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980085680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:41,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837917050] [2021-05-21 20:52:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:41,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:52:41,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:41,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837917050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:41,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:41,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:41,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78629879] [2021-05-21 20:52:41,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:41,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:41,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:41,653 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:42,003 INFO L93 Difference]: Finished difference Result 918 states and 2183 transitions. [2021-05-21 20:52:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:52:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:42,004 INFO L225 Difference]: With dead ends: 918 [2021-05-21 20:52:42,004 INFO L226 Difference]: Without dead ends: 888 [2021-05-21 20:52:42,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:52:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-05-21 20:52:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 716. [2021-05-21 20:52:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-05-21 20:52:42,011 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-05-21 20:52:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:42,011 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-05-21 20:52:42,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-05-21 20:52:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:42,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:42,011 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:42,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-05-21 20:52:42,212 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 221531890, now seen corresponding path program 61 times [2021-05-21 20:52:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:42,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239972967] [2021-05-21 20:52:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:42,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239972967] [2021-05-21 20:52:42,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239972967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567992710] [2021-05-21 20:52:42,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:42,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567992710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:42,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:42,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:42,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384829719] [2021-05-21 20:52:42,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:42,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:42,474 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:42,797 INFO L93 Difference]: Finished difference Result 770 states and 1876 transitions. [2021-05-21 20:52:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:42,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:42,798 INFO L225 Difference]: With dead ends: 770 [2021-05-21 20:52:42,798 INFO L226 Difference]: Without dead ends: 748 [2021-05-21 20:52:42,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:52:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-21 20:52:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2021-05-21 20:52:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-05-21 20:52:42,804 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-05-21 20:52:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:42,804 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-05-21 20:52:42,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-05-21 20:52:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:42,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:42,805 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:43,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-05-21 20:52:43,005 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 62 times [2021-05-21 20:52:43,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:43,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942734676] [2021-05-21 20:52:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:43,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:43,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942734676] [2021-05-21 20:52:43,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942734676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:43,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092060078] [2021-05-21 20:52:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:43,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:43,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:43,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092060078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:43,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:43,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:43,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045407879] [2021-05-21 20:52:43,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:43,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:43,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:43,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:43,303 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:43,822 INFO L93 Difference]: Finished difference Result 874 states and 2132 transitions. [2021-05-21 20:52:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:52:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:43,823 INFO L225 Difference]: With dead ends: 874 [2021-05-21 20:52:43,823 INFO L226 Difference]: Without dead ends: 844 [2021-05-21 20:52:43,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:52:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-05-21 20:52:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 724. [2021-05-21 20:52:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-05-21 20:52:43,829 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-05-21 20:52:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:43,829 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-05-21 20:52:43,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-05-21 20:52:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:43,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:43,830 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:44,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:44,030 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 63 times [2021-05-21 20:52:44,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:44,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878932652] [2021-05-21 20:52:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:44,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:44,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878932652] [2021-05-21 20:52:44,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878932652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:44,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615705918] [2021-05-21 20:52:44,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:44,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:52:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615705918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716886273] [2021-05-21 20:52:44,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:44,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:44,387 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:44,784 INFO L93 Difference]: Finished difference Result 914 states and 2224 transitions. [2021-05-21 20:52:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:52:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:44,785 INFO L225 Difference]: With dead ends: 914 [2021-05-21 20:52:44,785 INFO L226 Difference]: Without dead ends: 868 [2021-05-21 20:52:44,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:52:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-05-21 20:52:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 716. [2021-05-21 20:52:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-05-21 20:52:44,791 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-05-21 20:52:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:44,791 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-05-21 20:52:44,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-05-21 20:52:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:44,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:44,792 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-05-21 20:52:44,993 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 64 times [2021-05-21 20:52:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377987953] [2021-05-21 20:52:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:45,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:45,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377987953] [2021-05-21 20:52:45,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377987953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:45,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409723743] [2021-05-21 20:52:45,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:45,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:45,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409723743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:45,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:45,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:45,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361628732] [2021-05-21 20:52:45,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:45,268 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:45,521 INFO L93 Difference]: Finished difference Result 866 states and 2108 transitions. [2021-05-21 20:52:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:45,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:45,523 INFO L225 Difference]: With dead ends: 866 [2021-05-21 20:52:45,523 INFO L226 Difference]: Without dead ends: 828 [2021-05-21 20:52:45,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-05-21 20:52:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 732. [2021-05-21 20:52:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-05-21 20:52:45,529 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 28 [2021-05-21 20:52:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:45,529 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-05-21 20:52:45,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-05-21 20:52:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:45,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:45,530 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:45,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:45,731 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:45,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 65 times [2021-05-21 20:52:45,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:45,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797805338] [2021-05-21 20:52:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:45,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797805338] [2021-05-21 20:52:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797805338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003515602] [2021-05-21 20:52:45,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:52:45,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:46,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003515602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:46,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:46,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:46,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690447930] [2021-05-21 20:52:46,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:46,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:46,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:46,171 INFO L87 Difference]: Start difference. First operand 732 states and 1797 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:46,552 INFO L93 Difference]: Finished difference Result 930 states and 2264 transitions. [2021-05-21 20:52:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:46,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:46,553 INFO L225 Difference]: With dead ends: 930 [2021-05-21 20:52:46,553 INFO L226 Difference]: Without dead ends: 884 [2021-05-21 20:52:46,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-21 20:52:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 740. [2021-05-21 20:52:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-05-21 20:52:46,559 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-05-21 20:52:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:46,559 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-05-21 20:52:46,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-05-21 20:52:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:46,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:46,560 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:46,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-05-21 20:52:46,761 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 66 times [2021-05-21 20:52:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162599585] [2021-05-21 20:52:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:46,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:46,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162599585] [2021-05-21 20:52:46,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162599585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:46,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221363698] [2021-05-21 20:52:46,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:46,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:52:46,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:46,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221363698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788641951] [2021-05-21 20:52:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:47,052 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:47,387 INFO L93 Difference]: Finished difference Result 866 states and 2112 transitions. [2021-05-21 20:52:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:47,388 INFO L225 Difference]: With dead ends: 866 [2021-05-21 20:52:47,389 INFO L226 Difference]: Without dead ends: 836 [2021-05-21 20:52:47,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-05-21 20:52:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 740. [2021-05-21 20:52:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-05-21 20:52:47,395 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-05-21 20:52:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:47,395 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-05-21 20:52:47,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-05-21 20:52:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:47,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:47,396 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:47,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:47,597 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 67 times [2021-05-21 20:52:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:47,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39499969] [2021-05-21 20:52:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:47,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:47,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39499969] [2021-05-21 20:52:47,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39499969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:47,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768844310] [2021-05-21 20:52:47,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768844310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:47,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:47,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:47,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932661674] [2021-05-21 20:52:47,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:47,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:47,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:47,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:47,919 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:48,278 INFO L93 Difference]: Finished difference Result 882 states and 2148 transitions. [2021-05-21 20:52:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:48,279 INFO L225 Difference]: With dead ends: 882 [2021-05-21 20:52:48,279 INFO L226 Difference]: Without dead ends: 844 [2021-05-21 20:52:48,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-05-21 20:52:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 740. [2021-05-21 20:52:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-05-21 20:52:48,286 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-05-21 20:52:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:48,286 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-05-21 20:52:48,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-05-21 20:52:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:48,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:48,287 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:48,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-05-21 20:52:48,488 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:48,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 68 times [2021-05-21 20:52:48,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:48,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605437518] [2021-05-21 20:52:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:48,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:48,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605437518] [2021-05-21 20:52:48,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605437518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:48,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528108666] [2021-05-21 20:52:48,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:48,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:48,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528108666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:48,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:48,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:48,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179240754] [2021-05-21 20:52:48,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:48,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:48,797 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:49,222 INFO L93 Difference]: Finished difference Result 890 states and 2172 transitions. [2021-05-21 20:52:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:49,223 INFO L225 Difference]: With dead ends: 890 [2021-05-21 20:52:49,223 INFO L226 Difference]: Without dead ends: 860 [2021-05-21 20:52:49,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-05-21 20:52:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 748. [2021-05-21 20:52:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.459170013386881) internal successors, (1837), 747 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1837 transitions. [2021-05-21 20:52:49,230 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1837 transitions. Word has length 28 [2021-05-21 20:52:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:49,230 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1837 transitions. [2021-05-21 20:52:49,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1837 transitions. [2021-05-21 20:52:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:49,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:49,231 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:49,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:49,432 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 69 times [2021-05-21 20:52:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128800534] [2021-05-21 20:52:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:49,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:49,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128800534] [2021-05-21 20:52:49,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128800534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:49,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622296042] [2021-05-21 20:52:49,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:49,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:52:49,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:49,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:49,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622296042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:49,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:49,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:49,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846003525] [2021-05-21 20:52:49,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:49,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:49,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:49,752 INFO L87 Difference]: Start difference. First operand 748 states and 1837 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:50,051 INFO L93 Difference]: Finished difference Result 882 states and 2152 transitions. [2021-05-21 20:52:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:52:50,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:50,052 INFO L225 Difference]: With dead ends: 882 [2021-05-21 20:52:50,052 INFO L226 Difference]: Without dead ends: 852 [2021-05-21 20:52:50,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:52:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-05-21 20:52:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 756. [2021-05-21 20:52:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-05-21 20:52:50,059 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 28 [2021-05-21 20:52:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:50,059 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-05-21 20:52:50,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-05-21 20:52:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:50,060 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:50,060 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:50,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable801,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:50,260 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 70 times [2021-05-21 20:52:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:50,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209655975] [2021-05-21 20:52:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:50,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:50,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209655975] [2021-05-21 20:52:50,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209655975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:50,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40919706] [2021-05-21 20:52:50,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:50,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:50,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:50,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40919706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:50,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:50,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:50,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233843272] [2021-05-21 20:52:50,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:50,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:50,571 INFO L87 Difference]: Start difference. First operand 756 states and 1857 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:50,858 INFO L93 Difference]: Finished difference Result 834 states and 2032 transitions. [2021-05-21 20:52:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:52:50,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:50,859 INFO L225 Difference]: With dead ends: 834 [2021-05-21 20:52:50,859 INFO L226 Difference]: Without dead ends: 804 [2021-05-21 20:52:50,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:52:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-05-21 20:52:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 764. [2021-05-21 20:52:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.4600262123197902) internal successors, (1877), 763 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1877 transitions. [2021-05-21 20:52:50,866 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1877 transitions. Word has length 28 [2021-05-21 20:52:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:50,866 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 1877 transitions. [2021-05-21 20:52:50,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1877 transitions. [2021-05-21 20:52:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:50,867 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:50,867 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable813 [2021-05-21 20:52:51,069 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1978153802, now seen corresponding path program 71 times [2021-05-21 20:52:51,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:51,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5290922] [2021-05-21 20:52:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5290922] [2021-05-21 20:52:51,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5290922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:51,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297220615] [2021-05-21 20:52:51,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:51,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:52:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:51,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297220615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:51,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:51,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:51,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199404335] [2021-05-21 20:52:51,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:51,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:51,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:51,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:51,300 INFO L87 Difference]: Start difference. First operand 764 states and 1877 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:51,638 INFO L93 Difference]: Finished difference Result 938 states and 2292 transitions. [2021-05-21 20:52:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:52:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:51,640 INFO L225 Difference]: With dead ends: 938 [2021-05-21 20:52:51,640 INFO L226 Difference]: Without dead ends: 908 [2021-05-21 20:52:51,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 387.1ms TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:52:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-05-21 20:52:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 780. [2021-05-21 20:52:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-05-21 20:52:51,647 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-05-21 20:52:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:51,647 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-05-21 20:52:51,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-05-21 20:52:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:52:51,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:51,648 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:51,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:51,849 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:51,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 72 times [2021-05-21 20:52:51,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:51,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033950344] [2021-05-21 20:52:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:51,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:51,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033950344] [2021-05-21 20:52:51,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033950344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:51,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820803620] [2021-05-21 20:52:51,967 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:51,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:52:51,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:52:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:52,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820803620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:52,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:52,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:52:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253505681] [2021-05-21 20:52:52,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:52:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:52:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:52:52,224 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:52,620 INFO L93 Difference]: Finished difference Result 890 states and 2176 transitions. [2021-05-21 20:52:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:52:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:52,621 INFO L225 Difference]: With dead ends: 890 [2021-05-21 20:52:52,621 INFO L226 Difference]: Without dead ends: 868 [2021-05-21 20:52:52,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 506.7ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:52:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-05-21 20:52:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 780. [2021-05-21 20:52:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-05-21 20:52:52,628 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-05-21 20:52:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:52,628 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-05-21 20:52:52,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-05-21 20:52:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:52,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:52,629 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:52,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable831,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:52,830 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:52,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:52,830 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 73 times [2021-05-21 20:52:52,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:52,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69572883] [2021-05-21 20:52:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:52,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69572883] [2021-05-21 20:52:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69572883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:52,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680261981] [2021-05-21 20:52:52,945 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680261981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:53,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:53,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:53,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814737059] [2021-05-21 20:52:53,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:53,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:53,223 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:53,643 INFO L93 Difference]: Finished difference Result 1016 states and 2430 transitions. [2021-05-21 20:52:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:52:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:52:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:53,644 INFO L225 Difference]: With dead ends: 1016 [2021-05-21 20:52:53,644 INFO L226 Difference]: Without dead ends: 994 [2021-05-21 20:52:53,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:52:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-05-21 20:52:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 824. [2021-05-21 20:52:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.4702308626974485) internal successors, (2033), 823 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2033 transitions. [2021-05-21 20:52:53,651 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2033 transitions. Word has length 30 [2021-05-21 20:52:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:53,651 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2033 transitions. [2021-05-21 20:52:53,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2033 transitions. [2021-05-21 20:52:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:53,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:53,652 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:53,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-05-21 20:52:53,868 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 74 times [2021-05-21 20:52:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:53,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468042064] [2021-05-21 20:52:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:53,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:53,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468042064] [2021-05-21 20:52:53,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468042064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:53,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104530202] [2021-05-21 20:52:53,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:54,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:52:54,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:54,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:54,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104530202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:54,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:54,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939737516] [2021-05-21 20:52:54,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:54,300 INFO L87 Difference]: Start difference. First operand 824 states and 2033 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:54,691 INFO L93 Difference]: Finished difference Result 974 states and 2388 transitions. [2021-05-21 20:52:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:52:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:52:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:54,692 INFO L225 Difference]: With dead ends: 974 [2021-05-21 20:52:54,692 INFO L226 Difference]: Without dead ends: 944 [2021-05-21 20:52:54,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:52:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-05-21 20:52:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 840. [2021-05-21 20:52:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.470798569725864) internal successors, (2073), 839 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2073 transitions. [2021-05-21 20:52:54,700 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2073 transitions. Word has length 30 [2021-05-21 20:52:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:54,700 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2073 transitions. [2021-05-21 20:52:54,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2073 transitions. [2021-05-21 20:52:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:54,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:54,702 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:54,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:54,917 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 75 times [2021-05-21 20:52:54,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:54,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682155252] [2021-05-21 20:52:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:54,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:54,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682155252] [2021-05-21 20:52:55,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682155252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:55,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399022993] [2021-05-21 20:52:55,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:55,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:52:55,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:55,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399022993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:55,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:55,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:55,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919474951] [2021-05-21 20:52:55,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:55,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:55,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:55,319 INFO L87 Difference]: Start difference. First operand 840 states and 2073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:55,863 INFO L93 Difference]: Finished difference Result 1054 states and 2584 transitions. [2021-05-21 20:52:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:52:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:52:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:55,864 INFO L225 Difference]: With dead ends: 1054 [2021-05-21 20:52:55,864 INFO L226 Difference]: Without dead ends: 1016 [2021-05-21 20:52:55,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 681.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:52:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-05-21 20:52:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 856. [2021-05-21 20:52:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-05-21 20:52:55,872 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-05-21 20:52:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:55,873 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-05-21 20:52:55,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-05-21 20:52:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:55,874 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:55,874 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:56,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-05-21 20:52:56,074 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1390999484, now seen corresponding path program 76 times [2021-05-21 20:52:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:56,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323370261] [2021-05-21 20:52:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:56,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323370261] [2021-05-21 20:52:56,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323370261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:56,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58354342] [2021-05-21 20:52:56,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:56,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:56,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58354342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:56,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:56,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:56,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912661513] [2021-05-21 20:52:56,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:56,543 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:56,937 INFO L93 Difference]: Finished difference Result 990 states and 2432 transitions. [2021-05-21 20:52:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:52:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:56,938 INFO L225 Difference]: With dead ends: 990 [2021-05-21 20:52:56,938 INFO L226 Difference]: Without dead ends: 968 [2021-05-21 20:52:56,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:52:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-05-21 20:52:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 856. [2021-05-21 20:52:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-05-21 20:52:56,947 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-05-21 20:52:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:56,947 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-05-21 20:52:56,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-05-21 20:52:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:56,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:56,948 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:57,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:57,148 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 77 times [2021-05-21 20:52:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150333494] [2021-05-21 20:52:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:57,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150333494] [2021-05-21 20:52:57,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150333494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595121889] [2021-05-21 20:52:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:57,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:52:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:57,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:57,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595121889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:57,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:57,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913625413] [2021-05-21 20:52:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:57,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:57,553 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:57,997 INFO L93 Difference]: Finished difference Result 1110 states and 2724 transitions. [2021-05-21 20:52:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:52:57,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:52:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:57,999 INFO L225 Difference]: With dead ends: 1110 [2021-05-21 20:52:57,999 INFO L226 Difference]: Without dead ends: 1072 [2021-05-21 20:52:57,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:52:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-05-21 20:52:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 888. [2021-05-21 20:52:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.4723788049605413) internal successors, (2193), 887 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2193 transitions. [2021-05-21 20:52:58,007 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2193 transitions. Word has length 30 [2021-05-21 20:52:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:58,007 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2193 transitions. [2021-05-21 20:52:58,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2193 transitions. [2021-05-21 20:52:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:58,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:58,008 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:58,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-05-21 20:52:58,218 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:58,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 78 times [2021-05-21 20:52:58,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:58,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527005475] [2021-05-21 20:52:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:58,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:58,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527005475] [2021-05-21 20:52:58,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527005475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:58,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433476767] [2021-05-21 20:52:58,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:58,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:52:58,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:58,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433476767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:58,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:58,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:58,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462546391] [2021-05-21 20:52:58,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:58,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:58,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:58,660 INFO L87 Difference]: Start difference. First operand 888 states and 2193 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:59,096 INFO L93 Difference]: Finished difference Result 1158 states and 2848 transitions. [2021-05-21 20:52:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:52:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:52:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:59,097 INFO L225 Difference]: With dead ends: 1158 [2021-05-21 20:52:59,097 INFO L226 Difference]: Without dead ends: 1128 [2021-05-21 20:52:59,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:52:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-05-21 20:52:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 896. [2021-05-21 20:52:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.4726256983240225) internal successors, (2213), 895 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2213 transitions. [2021-05-21 20:52:59,115 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2213 transitions. Word has length 30 [2021-05-21 20:52:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:59,115 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2213 transitions. [2021-05-21 20:52:59,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2213 transitions. [2021-05-21 20:52:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:52:59,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:59,116 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:59,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:59,329 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:59,329 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 79 times [2021-05-21 20:52:59,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:59,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171395116] [2021-05-21 20:52:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:59,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171395116] [2021-05-21 20:52:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171395116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137421053] [2021-05-21 20:52:59,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:59,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:52:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:59,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137421053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:59,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:59,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:52:59,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227497835] [2021-05-21 20:52:59,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:52:59,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:52:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:52:59,904 INFO L87 Difference]: Start difference. First operand 896 states and 2213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:00,391 INFO L93 Difference]: Finished difference Result 1102 states and 2708 transitions. [2021-05-21 20:53:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:53:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:00,392 INFO L225 Difference]: With dead ends: 1102 [2021-05-21 20:53:00,392 INFO L226 Difference]: Without dead ends: 1072 [2021-05-21 20:53:00,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:53:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-05-21 20:53:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 928. [2021-05-21 20:53:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.4735706580366776) internal successors, (2293), 927 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2293 transitions. [2021-05-21 20:53:00,401 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2293 transitions. Word has length 30 [2021-05-21 20:53:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:00,401 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2293 transitions. [2021-05-21 20:53:00,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2293 transitions. [2021-05-21 20:53:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:00,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:00,402 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:00,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-05-21 20:53:00,603 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1967162948, now seen corresponding path program 80 times [2021-05-21 20:53:00,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:00,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389578254] [2021-05-21 20:53:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:00,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:00,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389578254] [2021-05-21 20:53:00,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389578254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:00,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962709550] [2021-05-21 20:53:00,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:00,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:01,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962709550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:01,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:01,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:01,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951069998] [2021-05-21 20:53:01,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:01,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:01,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:01,086 INFO L87 Difference]: Start difference. First operand 928 states and 2293 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:01,661 INFO L93 Difference]: Finished difference Result 1174 states and 2888 transitions. [2021-05-21 20:53:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:53:01,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:01,662 INFO L225 Difference]: With dead ends: 1174 [2021-05-21 20:53:01,662 INFO L226 Difference]: Without dead ends: 1144 [2021-05-21 20:53:01,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 793.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-05-21 20:53:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 944. [2021-05-21 20:53:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 2.4740190880169672) internal successors, (2333), 943 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2333 transitions. [2021-05-21 20:53:01,670 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2333 transitions. Word has length 30 [2021-05-21 20:53:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:01,670 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2333 transitions. [2021-05-21 20:53:01,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2333 transitions. [2021-05-21 20:53:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:01,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:01,671 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:01,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable945 [2021-05-21 20:53:01,872 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 81 times [2021-05-21 20:53:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756922563] [2021-05-21 20:53:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:02,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:02,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756922563] [2021-05-21 20:53:02,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756922563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:02,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183549418] [2021-05-21 20:53:02,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:02,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:53:02,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:02,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:02,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183549418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:02,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:02,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191965457] [2021-05-21 20:53:02,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:02,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:02,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:02,324 INFO L87 Difference]: Start difference. First operand 944 states and 2333 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:02,839 INFO L93 Difference]: Finished difference Result 1284 states and 3123 transitions. [2021-05-21 20:53:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:02,840 INFO L225 Difference]: With dead ends: 1284 [2021-05-21 20:53:02,840 INFO L226 Difference]: Without dead ends: 1254 [2021-05-21 20:53:02,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-05-21 20:53:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 992. [2021-05-21 20:53:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.4752774974772955) internal successors, (2453), 991 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2453 transitions. [2021-05-21 20:53:02,850 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2453 transitions. Word has length 30 [2021-05-21 20:53:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:02,850 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 2453 transitions. [2021-05-21 20:53:02,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2453 transitions. [2021-05-21 20:53:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:02,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:02,851 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:03,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-05-21 20:53:03,065 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1109773824, now seen corresponding path program 82 times [2021-05-21 20:53:03,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:03,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910122290] [2021-05-21 20:53:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:03,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:03,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910122290] [2021-05-21 20:53:03,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910122290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:03,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150753985] [2021-05-21 20:53:03,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:03,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:03,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:03,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:03,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150753985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:03,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:03,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:03,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882118245] [2021-05-21 20:53:03,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:03,565 INFO L87 Difference]: Start difference. First operand 992 states and 2453 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:04,125 INFO L93 Difference]: Finished difference Result 1222 states and 3008 transitions. [2021-05-21 20:53:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:53:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:04,126 INFO L225 Difference]: With dead ends: 1222 [2021-05-21 20:53:04,126 INFO L226 Difference]: Without dead ends: 1192 [2021-05-21 20:53:04,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:53:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-05-21 20:53:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1016. [2021-05-21 20:53:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.475862068965517) internal successors, (2513), 1015 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2513 transitions. [2021-05-21 20:53:04,136 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2513 transitions. Word has length 30 [2021-05-21 20:53:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:04,136 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2513 transitions. [2021-05-21 20:53:04,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2513 transitions. [2021-05-21 20:53:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:04,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:04,137 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:04,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:04,337 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 83 times [2021-05-21 20:53:04,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:04,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839216266] [2021-05-21 20:53:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:04,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839216266] [2021-05-21 20:53:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839216266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949074622] [2021-05-21 20:53:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:04,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:53:04,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:04,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:04,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:04,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949074622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:04,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:04,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:04,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499504637] [2021-05-21 20:53:04,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:04,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:04,845 INFO L87 Difference]: Start difference. First operand 1016 states and 2513 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:05,317 INFO L93 Difference]: Finished difference Result 1302 states and 3208 transitions. [2021-05-21 20:53:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:53:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:05,319 INFO L225 Difference]: With dead ends: 1302 [2021-05-21 20:53:05,319 INFO L226 Difference]: Without dead ends: 1272 [2021-05-21 20:53:05,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:53:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-05-21 20:53:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1040. [2021-05-21 20:53:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.4764196342637153) internal successors, (2573), 1039 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2573 transitions. [2021-05-21 20:53:05,328 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2573 transitions. Word has length 30 [2021-05-21 20:53:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:05,328 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2573 transitions. [2021-05-21 20:53:05,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2573 transitions. [2021-05-21 20:53:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:05,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:05,329 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:05,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-05-21 20:53:05,530 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 84 times [2021-05-21 20:53:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:05,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978557983] [2021-05-21 20:53:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:05,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978557983] [2021-05-21 20:53:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978557983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092687767] [2021-05-21 20:53:05,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:05,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:53:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:05,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092687767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:05,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:05,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:05,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131766510] [2021-05-21 20:53:05,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:05,974 INFO L87 Difference]: Start difference. First operand 1040 states and 2573 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:06,522 INFO L93 Difference]: Finished difference Result 1318 states and 3248 transitions. [2021-05-21 20:53:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:53:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:06,524 INFO L225 Difference]: With dead ends: 1318 [2021-05-21 20:53:06,524 INFO L226 Difference]: Without dead ends: 1288 [2021-05-21 20:53:06,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 719.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:53:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-05-21 20:53:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1048. [2021-05-21 20:53:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.4765998089780323) internal successors, (2593), 1047 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2593 transitions. [2021-05-21 20:53:06,534 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2593 transitions. Word has length 30 [2021-05-21 20:53:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:06,534 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2593 transitions. [2021-05-21 20:53:06,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2593 transitions. [2021-05-21 20:53:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:06,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:06,535 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:06,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-05-21 20:53:06,749 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:06,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2010082424, now seen corresponding path program 85 times [2021-05-21 20:53:06,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:06,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858131826] [2021-05-21 20:53:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:06,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:06,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858131826] [2021-05-21 20:53:06,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858131826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:06,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163956745] [2021-05-21 20:53:06,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:07,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163956745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:07,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:07,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711942188] [2021-05-21 20:53:07,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:07,281 INFO L87 Difference]: Start difference. First operand 1048 states and 2593 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:08,127 INFO L93 Difference]: Finished difference Result 1492 states and 3643 transitions. [2021-05-21 20:53:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:53:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:08,129 INFO L225 Difference]: With dead ends: 1492 [2021-05-21 20:53:08,129 INFO L226 Difference]: Without dead ends: 1462 [2021-05-21 20:53:08,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1059.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:53:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-05-21 20:53:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1152. [2021-05-21 20:53:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.4787141615986097) internal successors, (2853), 1151 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2853 transitions. [2021-05-21 20:53:08,139 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2853 transitions. Word has length 30 [2021-05-21 20:53:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:08,139 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2853 transitions. [2021-05-21 20:53:08,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2853 transitions. [2021-05-21 20:53:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:08,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:08,141 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:08,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-05-21 20:53:08,341 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1947238460, now seen corresponding path program 86 times [2021-05-21 20:53:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:08,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334134142] [2021-05-21 20:53:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:08,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334134142] [2021-05-21 20:53:08,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334134142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036369056] [2021-05-21 20:53:08,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:08,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:08,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036369056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:08,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:08,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:08,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297243454] [2021-05-21 20:53:08,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:08,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:08,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:08,662 INFO L87 Difference]: Start difference. First operand 1152 states and 2853 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:09,096 INFO L93 Difference]: Finished difference Result 1286 states and 3168 transitions. [2021-05-21 20:53:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:53:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:09,097 INFO L225 Difference]: With dead ends: 1286 [2021-05-21 20:53:09,097 INFO L226 Difference]: Without dead ends: 1256 [2021-05-21 20:53:09,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-05-21 20:53:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1168. [2021-05-21 20:53:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.479005998286204) internal successors, (2893), 1167 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2893 transitions. [2021-05-21 20:53:09,107 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2893 transitions. Word has length 30 [2021-05-21 20:53:09,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:09,107 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2893 transitions. [2021-05-21 20:53:09,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2893 transitions. [2021-05-21 20:53:09,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:09,108 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:09,108 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:09,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-05-21 20:53:09,309 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:09,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 87 times [2021-05-21 20:53:09,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:09,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040741035] [2021-05-21 20:53:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:09,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040741035] [2021-05-21 20:53:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040741035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080559655] [2021-05-21 20:53:09,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:09,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:53:09,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:09,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080559655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:09,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:09,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:09,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764171420] [2021-05-21 20:53:09,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:09,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:09,701 INFO L87 Difference]: Start difference. First operand 1168 states and 2893 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:10,121 INFO L93 Difference]: Finished difference Result 1468 states and 3583 transitions. [2021-05-21 20:53:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:10,127 INFO L225 Difference]: With dead ends: 1468 [2021-05-21 20:53:10,128 INFO L226 Difference]: Without dead ends: 1438 [2021-05-21 20:53:10,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-05-21 20:53:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1192. [2021-05-21 20:53:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.479429051217464) internal successors, (2953), 1191 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2953 transitions. [2021-05-21 20:53:10,138 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2953 transitions. Word has length 30 [2021-05-21 20:53:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:10,138 INFO L482 AbstractCegarLoop]: Abstraction has 1192 states and 2953 transitions. [2021-05-21 20:53:10,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2953 transitions. [2021-05-21 20:53:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:10,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:10,139 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:10,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:10,339 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1991143168, now seen corresponding path program 88 times [2021-05-21 20:53:10,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:10,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090645555] [2021-05-21 20:53:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:10,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090645555] [2021-05-21 20:53:10,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090645555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:10,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892135758] [2021-05-21 20:53:10,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:10,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892135758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:10,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:10,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:10,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825536973] [2021-05-21 20:53:10,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:10,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:10,823 INFO L87 Difference]: Start difference. First operand 1192 states and 2953 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:11,329 INFO L93 Difference]: Finished difference Result 1350 states and 3332 transitions. [2021-05-21 20:53:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:53:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:11,330 INFO L225 Difference]: With dead ends: 1350 [2021-05-21 20:53:11,330 INFO L226 Difference]: Without dead ends: 1328 [2021-05-21 20:53:11,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:53:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-05-21 20:53:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1208. [2021-05-21 20:53:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-05-21 20:53:11,340 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-05-21 20:53:11,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:11,340 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-05-21 20:53:11,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-05-21 20:53:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:11,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:11,342 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:11,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:11,542 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash 260373436, now seen corresponding path program 89 times [2021-05-21 20:53:11,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:11,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408465923] [2021-05-21 20:53:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:11,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408465923] [2021-05-21 20:53:11,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408465923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254117818] [2021-05-21 20:53:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:11,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:53:11,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:11,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:11,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254117818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:11,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:11,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:11,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400018229] [2021-05-21 20:53:11,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:11,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:11,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:11,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:11,987 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:12,396 INFO L93 Difference]: Finished difference Result 1342 states and 3312 transitions. [2021-05-21 20:53:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:53:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:12,398 INFO L225 Difference]: With dead ends: 1342 [2021-05-21 20:53:12,398 INFO L226 Difference]: Without dead ends: 1320 [2021-05-21 20:53:12,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:53:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-05-21 20:53:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1200. [2021-05-21 20:53:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.479566305254379) internal successors, (2973), 1199 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2973 transitions. [2021-05-21 20:53:12,413 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2973 transitions. Word has length 30 [2021-05-21 20:53:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:12,413 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2973 transitions. [2021-05-21 20:53:12,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2973 transitions. [2021-05-21 20:53:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:12,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:12,415 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:12,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-05-21 20:53:12,616 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 90 times [2021-05-21 20:53:12,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:12,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458549199] [2021-05-21 20:53:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:12,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:12,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458549199] [2021-05-21 20:53:12,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458549199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:12,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800290581] [2021-05-21 20:53:12,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:12,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:53:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:13,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800290581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:13,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:13,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:13,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589425367] [2021-05-21 20:53:13,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:13,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:13,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:13,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:13,014 INFO L87 Difference]: Start difference. First operand 1200 states and 2973 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:13,571 INFO L93 Difference]: Finished difference Result 1398 states and 3448 transitions. [2021-05-21 20:53:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:53:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:13,572 INFO L225 Difference]: With dead ends: 1398 [2021-05-21 20:53:13,572 INFO L226 Difference]: Without dead ends: 1368 [2021-05-21 20:53:13,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:53:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-05-21 20:53:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1208. [2021-05-21 20:53:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-05-21 20:53:13,583 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-05-21 20:53:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:13,583 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-05-21 20:53:13,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-05-21 20:53:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:13,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:13,584 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:13,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-05-21 20:53:13,785 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 70439040, now seen corresponding path program 91 times [2021-05-21 20:53:13,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:13,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304851134] [2021-05-21 20:53:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:13,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304851134] [2021-05-21 20:53:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304851134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956428169] [2021-05-21 20:53:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:13,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:14,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956428169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:14,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:14,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:14,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110288093] [2021-05-21 20:53:14,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:14,212 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:14,815 INFO L93 Difference]: Finished difference Result 1462 states and 3608 transitions. [2021-05-21 20:53:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:53:14,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:14,816 INFO L225 Difference]: With dead ends: 1462 [2021-05-21 20:53:14,816 INFO L226 Difference]: Without dead ends: 1432 [2021-05-21 20:53:14,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-05-21 20:53:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1240. [2021-05-21 20:53:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.480225988700565) internal successors, (3073), 1239 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3073 transitions. [2021-05-21 20:53:14,826 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3073 transitions. Word has length 30 [2021-05-21 20:53:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:14,827 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 3073 transitions. [2021-05-21 20:53:14,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3073 transitions. [2021-05-21 20:53:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:14,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:14,828 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:15,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1128,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:15,028 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1329577404, now seen corresponding path program 92 times [2021-05-21 20:53:15,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:15,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568328002] [2021-05-21 20:53:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:15,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:15,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568328002] [2021-05-21 20:53:15,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568328002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:15,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722807021] [2021-05-21 20:53:15,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:15,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:15,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:15,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722807021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:15,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:15,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:15,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012284722] [2021-05-21 20:53:15,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:15,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:15,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:15,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:15,460 INFO L87 Difference]: Start difference. First operand 1240 states and 3073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:15,933 INFO L93 Difference]: Finished difference Result 1834 states and 4484 transitions. [2021-05-21 20:53:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:53:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:15,935 INFO L225 Difference]: With dead ends: 1834 [2021-05-21 20:53:15,935 INFO L226 Difference]: Without dead ends: 1776 [2021-05-21 20:53:15,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:53:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-05-21 20:53:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1360. [2021-05-21 20:53:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.487858719646799) internal successors, (3381), 1359 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3381 transitions. [2021-05-21 20:53:15,947 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3381 transitions. Word has length 30 [2021-05-21 20:53:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:15,947 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3381 transitions. [2021-05-21 20:53:15,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3381 transitions. [2021-05-21 20:53:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:15,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:15,948 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:16,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:16,148 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1619222852, now seen corresponding path program 93 times [2021-05-21 20:53:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:16,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652628683] [2021-05-21 20:53:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:16,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652628683] [2021-05-21 20:53:16,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652628683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324070855] [2021-05-21 20:53:16,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:16,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:53:16,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:16,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:16,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324070855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:16,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:16,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:16,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293331144] [2021-05-21 20:53:16,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:16,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:16,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:16,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:16,545 INFO L87 Difference]: Start difference. First operand 1360 states and 3381 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:16,921 INFO L93 Difference]: Finished difference Result 1574 states and 3896 transitions. [2021-05-21 20:53:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:53:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:16,923 INFO L225 Difference]: With dead ends: 1574 [2021-05-21 20:53:16,923 INFO L226 Difference]: Without dead ends: 1544 [2021-05-21 20:53:16,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:53:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-05-21 20:53:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1376. [2021-05-21 20:53:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.488) internal successors, (3421), 1375 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 3421 transitions. [2021-05-21 20:53:16,934 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 3421 transitions. Word has length 30 [2021-05-21 20:53:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:16,934 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 3421 transitions. [2021-05-21 20:53:16,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 3421 transitions. [2021-05-21 20:53:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:16,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:16,935 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:17,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1153,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:17,136 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 94 times [2021-05-21 20:53:17,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:17,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025972109] [2021-05-21 20:53:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:17,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025972109] [2021-05-21 20:53:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025972109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678121238] [2021-05-21 20:53:17,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:17,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:17,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:17,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:17,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678121238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:17,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:17,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550206320] [2021-05-21 20:53:17,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:17,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:17,524 INFO L87 Difference]: Start difference. First operand 1376 states and 3421 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:18,037 INFO L93 Difference]: Finished difference Result 1646 states and 4072 transitions. [2021-05-21 20:53:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:18,039 INFO L225 Difference]: With dead ends: 1646 [2021-05-21 20:53:18,039 INFO L226 Difference]: Without dead ends: 1608 [2021-05-21 20:53:18,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 647.8ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:53:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-05-21 20:53:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1384. [2021-05-21 20:53:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.488069414316703) internal successors, (3441), 1383 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3441 transitions. [2021-05-21 20:53:18,051 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3441 transitions. Word has length 30 [2021-05-21 20:53:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:18,051 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 3441 transitions. [2021-05-21 20:53:18,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3441 transitions. [2021-05-21 20:53:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:18,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:18,052 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:18,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-05-21 20:53:18,253 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1217793912, now seen corresponding path program 95 times [2021-05-21 20:53:18,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:18,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996286141] [2021-05-21 20:53:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:18,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996286141] [2021-05-21 20:53:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996286141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072078818] [2021-05-21 20:53:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:18,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:53:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:18,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:18,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072078818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:18,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:18,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:18,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130486496] [2021-05-21 20:53:18,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:18,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:18,682 INFO L87 Difference]: Start difference. First operand 1384 states and 3441 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:19,071 INFO L93 Difference]: Finished difference Result 1630 states and 4032 transitions. [2021-05-21 20:53:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:53:19,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:19,073 INFO L225 Difference]: With dead ends: 1630 [2021-05-21 20:53:19,073 INFO L226 Difference]: Without dead ends: 1592 [2021-05-21 20:53:19,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:53:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-05-21 20:53:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1392. [2021-05-21 20:53:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.488138030194105) internal successors, (3461), 1391 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 3461 transitions. [2021-05-21 20:53:19,090 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 3461 transitions. Word has length 30 [2021-05-21 20:53:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:19,090 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 3461 transitions. [2021-05-21 20:53:19,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 3461 transitions. [2021-05-21 20:53:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:19,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:19,091 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:19,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-05-21 20:53:19,291 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 879456376, now seen corresponding path program 96 times [2021-05-21 20:53:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:19,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360903384] [2021-05-21 20:53:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:19,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:19,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360903384] [2021-05-21 20:53:19,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360903384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:19,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448970852] [2021-05-21 20:53:19,448 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:19,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:53:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:19,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:19,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:19,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448970852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:19,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:19,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383929456] [2021-05-21 20:53:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:19,726 INFO L87 Difference]: Start difference. First operand 1392 states and 3461 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:20,112 INFO L93 Difference]: Finished difference Result 1664 states and 4071 transitions. [2021-05-21 20:53:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:53:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:20,114 INFO L225 Difference]: With dead ends: 1664 [2021-05-21 20:53:20,114 INFO L226 Difference]: Without dead ends: 1622 [2021-05-21 20:53:20,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:53:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-05-21 20:53:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1424. [2021-05-21 20:53:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.488404778636683) internal successors, (3541), 1423 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3541 transitions. [2021-05-21 20:53:20,125 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3541 transitions. Word has length 30 [2021-05-21 20:53:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:20,125 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3541 transitions. [2021-05-21 20:53:20,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3541 transitions. [2021-05-21 20:53:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:20,126 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:20,126 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:20,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1203 [2021-05-21 20:53:20,326 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -851313356, now seen corresponding path program 97 times [2021-05-21 20:53:20,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:20,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39878451] [2021-05-21 20:53:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:20,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:20,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39878451] [2021-05-21 20:53:20,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39878451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:20,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678450872] [2021-05-21 20:53:20,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:20,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:20,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678450872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:20,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:20,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:20,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707749154] [2021-05-21 20:53:20,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:20,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:20,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:20,784 INFO L87 Difference]: Start difference. First operand 1424 states and 3541 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:21,312 INFO L93 Difference]: Finished difference Result 1774 states and 4360 transitions. [2021-05-21 20:53:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:21,313 INFO L225 Difference]: With dead ends: 1774 [2021-05-21 20:53:21,313 INFO L226 Difference]: Without dead ends: 1744 [2021-05-21 20:53:21,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-05-21 20:53:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1432. [2021-05-21 20:53:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.488469601677149) internal successors, (3561), 1431 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 3561 transitions. [2021-05-21 20:53:21,340 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 3561 transitions. Word has length 30 [2021-05-21 20:53:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:21,340 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 3561 transitions. [2021-05-21 20:53:21,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 3561 transitions. [2021-05-21 20:53:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:21,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:21,341 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:21,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1215 [2021-05-21 20:53:21,542 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:21,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 98 times [2021-05-21 20:53:21,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:21,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508171360] [2021-05-21 20:53:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:21,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:21,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508171360] [2021-05-21 20:53:21,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508171360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:21,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989823179] [2021-05-21 20:53:21,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:21,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:21,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989823179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:21,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:21,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:21,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001501230] [2021-05-21 20:53:21,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:21,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:21,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:21,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:21,982 INFO L87 Difference]: Start difference. First operand 1432 states and 3561 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:22,433 INFO L93 Difference]: Finished difference Result 1646 states and 4076 transitions. [2021-05-21 20:53:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:53:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:22,434 INFO L225 Difference]: With dead ends: 1646 [2021-05-21 20:53:22,434 INFO L226 Difference]: Without dead ends: 1616 [2021-05-21 20:53:22,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:53:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-05-21 20:53:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1464. [2021-05-21 20:53:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-05-21 20:53:22,446 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-05-21 20:53:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:22,446 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-05-21 20:53:22,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-05-21 20:53:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:22,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:22,447 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:22,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-05-21 20:53:22,647 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 99 times [2021-05-21 20:53:22,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:22,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333517850] [2021-05-21 20:53:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:22,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:22,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333517850] [2021-05-21 20:53:22,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333517850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:22,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117289987] [2021-05-21 20:53:22,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:22,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:53:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:23,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117289987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:23,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:23,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337196434] [2021-05-21 20:53:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:23,085 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:23,419 INFO L93 Difference]: Finished difference Result 1686 states and 4176 transitions. [2021-05-21 20:53:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:53:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:23,420 INFO L225 Difference]: With dead ends: 1686 [2021-05-21 20:53:23,420 INFO L226 Difference]: Without dead ends: 1656 [2021-05-21 20:53:23,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:53:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-21 20:53:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1464. [2021-05-21 20:53:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-05-21 20:53:23,432 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-05-21 20:53:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:23,432 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-05-21 20:53:23,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-05-21 20:53:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:23,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:23,433 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:23,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:23,633 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 100 times [2021-05-21 20:53:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:23,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357969376] [2021-05-21 20:53:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:23,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:23,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357969376] [2021-05-21 20:53:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357969376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:23,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349806828] [2021-05-21 20:53:23,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:23,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:23,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:23,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:24,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349806828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:24,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:24,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791403228] [2021-05-21 20:53:24,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:24,162 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:24,649 INFO L93 Difference]: Finished difference Result 1678 states and 4156 transitions. [2021-05-21 20:53:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:53:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:24,650 INFO L225 Difference]: With dead ends: 1678 [2021-05-21 20:53:24,650 INFO L226 Difference]: Without dead ends: 1648 [2021-05-21 20:53:24,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 757.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:53:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-05-21 20:53:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1472. [2021-05-21 20:53:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.488783140720598) internal successors, (3661), 1471 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 3661 transitions. [2021-05-21 20:53:24,662 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 3661 transitions. Word has length 30 [2021-05-21 20:53:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:24,662 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 3661 transitions. [2021-05-21 20:53:24,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 3661 transitions. [2021-05-21 20:53:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:24,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:24,664 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:24,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:24,877 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 848281916, now seen corresponding path program 101 times [2021-05-21 20:53:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:24,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408121409] [2021-05-21 20:53:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:24,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408121409] [2021-05-21 20:53:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408121409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003227703] [2021-05-21 20:53:24,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:25,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:53:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003227703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:25,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:25,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:25,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884376742] [2021-05-21 20:53:25,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:25,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:25,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:25,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:25,332 INFO L87 Difference]: Start difference. First operand 1472 states and 3661 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:25,848 INFO L93 Difference]: Finished difference Result 1844 states and 4531 transitions. [2021-05-21 20:53:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:53:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:25,850 INFO L225 Difference]: With dead ends: 1844 [2021-05-21 20:53:25,850 INFO L226 Difference]: Without dead ends: 1814 [2021-05-21 20:53:25,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 717.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:53:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-05-21 20:53:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1496. [2021-05-21 20:53:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.488963210702341) internal successors, (3721), 1495 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3721 transitions. [2021-05-21 20:53:25,863 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3721 transitions. Word has length 30 [2021-05-21 20:53:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:25,863 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3721 transitions. [2021-05-21 20:53:25,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3721 transitions. [2021-05-21 20:53:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:25,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:25,865 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:26,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-05-21 20:53:26,065 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash 204964284, now seen corresponding path program 102 times [2021-05-21 20:53:26,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:26,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576710216] [2021-05-21 20:53:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:26,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576710216] [2021-05-21 20:53:26,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576710216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58083204] [2021-05-21 20:53:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:26,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:53:26,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:26,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58083204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:26,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:26,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:26,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879816020] [2021-05-21 20:53:26,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:26,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:26,400 INFO L87 Difference]: Start difference. First operand 1496 states and 3721 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:26,814 INFO L93 Difference]: Finished difference Result 1782 states and 4372 transitions. [2021-05-21 20:53:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:53:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:26,816 INFO L225 Difference]: With dead ends: 1782 [2021-05-21 20:53:26,816 INFO L226 Difference]: Without dead ends: 1744 [2021-05-21 20:53:26,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:53:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-05-21 20:53:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1536. [2021-05-21 20:53:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-05-21 20:53:26,829 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-05-21 20:53:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:26,829 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-05-21 20:53:26,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-05-21 20:53:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:26,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:26,830 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:27,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1305 [2021-05-21 20:53:27,031 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1072422212, now seen corresponding path program 103 times [2021-05-21 20:53:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:27,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731960343] [2021-05-21 20:53:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:27,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:27,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731960343] [2021-05-21 20:53:27,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731960343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:27,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105899820] [2021-05-21 20:53:27,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:27,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105899820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:27,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:27,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:27,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466560988] [2021-05-21 20:53:27,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:27,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:27,399 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:27,872 INFO L93 Difference]: Finished difference Result 1670 states and 4136 transitions. [2021-05-21 20:53:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:27,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:27,873 INFO L225 Difference]: With dead ends: 1670 [2021-05-21 20:53:27,873 INFO L226 Difference]: Without dead ends: 1640 [2021-05-21 20:53:27,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:53:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-05-21 20:53:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1536. [2021-05-21 20:53:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-05-21 20:53:27,885 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-05-21 20:53:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:27,885 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-05-21 20:53:27,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-05-21 20:53:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:27,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:27,886 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:28,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:28,087 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176184, now seen corresponding path program 104 times [2021-05-21 20:53:28,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:28,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137261720] [2021-05-21 20:53:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:28,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:28,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137261720] [2021-05-21 20:53:28,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137261720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:28,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255634798] [2021-05-21 20:53:28,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255634798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:28,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087497097] [2021-05-21 20:53:28,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:28,531 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:29,012 INFO L93 Difference]: Finished difference Result 1862 states and 4616 transitions. [2021-05-21 20:53:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:53:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:29,014 INFO L225 Difference]: With dead ends: 1862 [2021-05-21 20:53:29,014 INFO L226 Difference]: Without dead ends: 1824 [2021-05-21 20:53:29,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-05-21 20:53:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1528. [2021-05-21 20:53:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.4891944990176817) internal successors, (3801), 1527 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3801 transitions. [2021-05-21 20:53:29,026 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3801 transitions. Word has length 30 [2021-05-21 20:53:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:29,026 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 3801 transitions. [2021-05-21 20:53:29,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3801 transitions. [2021-05-21 20:53:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:29,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:29,027 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:29,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-05-21 20:53:29,228 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 105 times [2021-05-21 20:53:29,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:29,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457721127] [2021-05-21 20:53:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:29,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:29,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457721127] [2021-05-21 20:53:29,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457721127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:29,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515497729] [2021-05-21 20:53:29,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:29,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:53:29,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:29,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:29,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515497729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:29,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:29,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:29,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449024270] [2021-05-21 20:53:29,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:29,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:29,640 INFO L87 Difference]: Start difference. First operand 1528 states and 3801 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:30,202 INFO L93 Difference]: Finished difference Result 1806 states and 4476 transitions. [2021-05-21 20:53:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:30,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:30,203 INFO L225 Difference]: With dead ends: 1806 [2021-05-21 20:53:30,203 INFO L226 Difference]: Without dead ends: 1776 [2021-05-21 20:53:30,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 731.3ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:53:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-05-21 20:53:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1536. [2021-05-21 20:53:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-05-21 20:53:30,216 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-05-21 20:53:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:30,216 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-05-21 20:53:30,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-05-21 20:53:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:30,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:30,217 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:30,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:30,432 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:30,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1255775796, now seen corresponding path program 106 times [2021-05-21 20:53:30,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:30,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324383491] [2021-05-21 20:53:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:30,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:30,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324383491] [2021-05-21 20:53:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324383491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:30,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386224734] [2021-05-21 20:53:30,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:30,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386224734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:30,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:30,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048483878] [2021-05-21 20:53:30,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:30,855 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:31,302 INFO L93 Difference]: Finished difference Result 1942 states and 4776 transitions. [2021-05-21 20:53:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:31,304 INFO L225 Difference]: With dead ends: 1942 [2021-05-21 20:53:31,304 INFO L226 Difference]: Without dead ends: 1912 [2021-05-21 20:53:31,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 603.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-05-21 20:53:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1560. [2021-05-21 20:53:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 2.4894162924951893) internal successors, (3881), 1559 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 3881 transitions. [2021-05-21 20:53:31,318 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 3881 transitions. Word has length 30 [2021-05-21 20:53:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:31,318 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 3881 transitions. [2021-05-21 20:53:31,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 3881 transitions. [2021-05-21 20:53:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:31,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:31,319 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:31,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-05-21 20:53:31,520 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 107 times [2021-05-21 20:53:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:31,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931953779] [2021-05-21 20:53:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:31,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:31,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931953779] [2021-05-21 20:53:31,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931953779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:31,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19174830] [2021-05-21 20:53:31,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:31,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:53:31,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:31,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:31,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19174830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:31,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:31,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:31,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461492627] [2021-05-21 20:53:31,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:31,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:31,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:31,913 INFO L87 Difference]: Start difference. First operand 1560 states and 3881 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:32,297 INFO L93 Difference]: Finished difference Result 1782 states and 4420 transitions. [2021-05-21 20:53:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:53:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:32,298 INFO L225 Difference]: With dead ends: 1782 [2021-05-21 20:53:32,298 INFO L226 Difference]: Without dead ends: 1752 [2021-05-21 20:53:32,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:53:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-05-21 20:53:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1576. [2021-05-21 20:53:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-05-21 20:53:32,310 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-05-21 20:53:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:32,310 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-05-21 20:53:32,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-05-21 20:53:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:32,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:32,312 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:32,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1392,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:32,526 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1862466628, now seen corresponding path program 108 times [2021-05-21 20:53:32,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:32,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904801196] [2021-05-21 20:53:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:32,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904801196] [2021-05-21 20:53:32,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904801196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284590413] [2021-05-21 20:53:32,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:32,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:53:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:32,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284590413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:32,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:32,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:32,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252428831] [2021-05-21 20:53:32,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:32,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:32,873 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:33,153 INFO L93 Difference]: Finished difference Result 1702 states and 4216 transitions. [2021-05-21 20:53:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:53:33,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:33,154 INFO L225 Difference]: With dead ends: 1702 [2021-05-21 20:53:33,154 INFO L226 Difference]: Without dead ends: 1672 [2021-05-21 20:53:33,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:53:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-05-21 20:53:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1576. [2021-05-21 20:53:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-05-21 20:53:33,167 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-05-21 20:53:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:33,167 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-05-21 20:53:33,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-05-21 20:53:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:33,168 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:33,169 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:33,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1413 [2021-05-21 20:53:33,369 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 109 times [2021-05-21 20:53:33,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:33,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988291927] [2021-05-21 20:53:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:33,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988291927] [2021-05-21 20:53:33,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988291927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125587740] [2021-05-21 20:53:33,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:33,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:33,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125587740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:33,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:33,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:33,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90967376] [2021-05-21 20:53:33,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:33,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:33,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:33,761 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:34,269 INFO L93 Difference]: Finished difference Result 1798 states and 4456 transitions. [2021-05-21 20:53:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:53:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:34,271 INFO L225 Difference]: With dead ends: 1798 [2021-05-21 20:53:34,271 INFO L226 Difference]: Without dead ends: 1768 [2021-05-21 20:53:34,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:53:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-05-21 20:53:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1584. [2021-05-21 20:53:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4895767530006316) internal successors, (3941), 1583 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3941 transitions. [2021-05-21 20:53:34,284 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3941 transitions. Word has length 30 [2021-05-21 20:53:34,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:34,285 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 3941 transitions. [2021-05-21 20:53:34,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:34,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3941 transitions. [2021-05-21 20:53:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:34,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:34,286 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:34,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1426,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:34,500 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024460, now seen corresponding path program 110 times [2021-05-21 20:53:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:34,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739860847] [2021-05-21 20:53:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:34,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:34,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739860847] [2021-05-21 20:53:34,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739860847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:34,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612540340] [2021-05-21 20:53:34,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:34,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:34,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:34,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612540340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:34,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:34,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:34,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465130964] [2021-05-21 20:53:34,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:34,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:34,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:34,959 INFO L87 Difference]: Start difference. First operand 1584 states and 3941 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:35,573 INFO L93 Difference]: Finished difference Result 1894 states and 4656 transitions. [2021-05-21 20:53:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:53:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:35,576 INFO L225 Difference]: With dead ends: 1894 [2021-05-21 20:53:35,576 INFO L226 Difference]: Without dead ends: 1864 [2021-05-21 20:53:35,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 771.3ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:53:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-05-21 20:53:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1600. [2021-05-21 20:53:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4896810506566602) internal successors, (3981), 1599 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3981 transitions. [2021-05-21 20:53:35,591 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3981 transitions. Word has length 30 [2021-05-21 20:53:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:35,591 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3981 transitions. [2021-05-21 20:53:35,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3981 transitions. [2021-05-21 20:53:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:35,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:35,593 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:35,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:35,805 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash -300592264, now seen corresponding path program 111 times [2021-05-21 20:53:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:35,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814241994] [2021-05-21 20:53:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:35,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814241994] [2021-05-21 20:53:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814241994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026304992] [2021-05-21 20:53:35,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:35,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:53:35,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:35,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:35,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:36,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026304992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:36,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:36,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:36,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053690130] [2021-05-21 20:53:36,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:36,212 INFO L87 Difference]: Start difference. First operand 1600 states and 3981 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:36,647 INFO L93 Difference]: Finished difference Result 2008 states and 4927 transitions. [2021-05-21 20:53:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:53:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:36,649 INFO L225 Difference]: With dead ends: 2008 [2021-05-21 20:53:36,649 INFO L226 Difference]: Without dead ends: 1958 [2021-05-21 20:53:36,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:53:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-05-21 20:53:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1640. [2021-05-21 20:53:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 2.48993288590604) internal successors, (4081), 1639 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 4081 transitions. [2021-05-21 20:53:36,683 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 4081 transitions. Word has length 30 [2021-05-21 20:53:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:36,684 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 4081 transitions. [2021-05-21 20:53:36,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 4081 transitions. [2021-05-21 20:53:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:36,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:36,699 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:36,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-05-21 20:53:36,915 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2031361996, now seen corresponding path program 112 times [2021-05-21 20:53:36,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:36,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17157970] [2021-05-21 20:53:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:37,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:37,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17157970] [2021-05-21 20:53:37,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17157970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:37,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609610265] [2021-05-21 20:53:37,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:37,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:37,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:37,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:37,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609610265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:37,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:37,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366938657] [2021-05-21 20:53:37,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:37,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:37,324 INFO L87 Difference]: Start difference. First operand 1640 states and 4081 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:37,804 INFO L93 Difference]: Finished difference Result 2030 states and 5000 transitions. [2021-05-21 20:53:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:53:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:37,807 INFO L225 Difference]: With dead ends: 2030 [2021-05-21 20:53:37,807 INFO L226 Difference]: Without dead ends: 2000 [2021-05-21 20:53:37,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:53:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-05-21 20:53:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1648. [2021-05-21 20:53:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.4899817850637525) internal successors, (4101), 1647 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4101 transitions. [2021-05-21 20:53:37,821 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4101 transitions. Word has length 30 [2021-05-21 20:53:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:37,821 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 4101 transitions. [2021-05-21 20:53:37,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4101 transitions. [2021-05-21 20:53:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:37,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:37,822 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:38,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-05-21 20:53:38,023 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 113 times [2021-05-21 20:53:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:38,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079310887] [2021-05-21 20:53:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:38,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079310887] [2021-05-21 20:53:38,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079310887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349079571] [2021-05-21 20:53:38,117 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:38,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:53:38,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:53:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:38,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349079571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:38,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:38,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:38,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388486681] [2021-05-21 20:53:38,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:38,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:38,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:38,425 INFO L87 Difference]: Start difference. First operand 1648 states and 4101 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:38,979 INFO L93 Difference]: Finished difference Result 2030 states and 4996 transitions. [2021-05-21 20:53:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:53:38,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:38,982 INFO L225 Difference]: With dead ends: 2030 [2021-05-21 20:53:38,982 INFO L226 Difference]: Without dead ends: 2000 [2021-05-21 20:53:38,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:53:38,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-05-21 20:53:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1672. [2021-05-21 20:53:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 2.490125673249551) internal successors, (4161), 1671 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 4161 transitions. [2021-05-21 20:53:38,997 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 4161 transitions. Word has length 30 [2021-05-21 20:53:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:38,997 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 4161 transitions. [2021-05-21 20:53:38,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 4161 transitions. [2021-05-21 20:53:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 20:53:38,999 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:38,999 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:39,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1492,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:39,209 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1490022136, now seen corresponding path program 4 times [2021-05-21 20:53:39,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:39,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183449664] [2021-05-21 20:53:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:39,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:39,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183449664] [2021-05-21 20:53:39,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183449664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:39,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30763859] [2021-05-21 20:53:39,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:39,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:39,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:39,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:53:39,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:39,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30763859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:39,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:39,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:53:39,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493367781] [2021-05-21 20:53:39,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:53:39,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:39,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:53:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:53:39,866 INFO L87 Difference]: Start difference. First operand 1672 states and 4161 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:40,320 INFO L93 Difference]: Finished difference Result 1774 states and 4388 transitions. [2021-05-21 20:53:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:53:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 20:53:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:40,322 INFO L225 Difference]: With dead ends: 1774 [2021-05-21 20:53:40,322 INFO L226 Difference]: Without dead ends: 1728 [2021-05-21 20:53:40,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 650.9ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:53:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-05-21 20:53:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1696. [2021-05-21 20:53:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.4902654867256637) internal successors, (4221), 1695 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4221 transitions. [2021-05-21 20:53:40,335 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4221 transitions. Word has length 30 [2021-05-21 20:53:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:40,335 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 4221 transitions. [2021-05-21 20:53:40,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4221 transitions. [2021-05-21 20:53:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:40,336 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:40,336 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:40,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1510 [2021-05-21 20:53:40,537 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:40,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 114 times [2021-05-21 20:53:40,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:40,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959510505] [2021-05-21 20:53:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:40,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:40,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959510505] [2021-05-21 20:53:40,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959510505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:40,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322096788] [2021-05-21 20:53:40,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:40,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:53:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:53:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322096788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:41,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:41,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:41,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848461194] [2021-05-21 20:53:41,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:41,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:41,004 INFO L87 Difference]: Start difference. First operand 1696 states and 4221 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:41,466 INFO L93 Difference]: Finished difference Result 1846 states and 4580 transitions. [2021-05-21 20:53:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:41,468 INFO L225 Difference]: With dead ends: 1846 [2021-05-21 20:53:41,468 INFO L226 Difference]: Without dead ends: 1824 [2021-05-21 20:53:41,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-05-21 20:53:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1704. [2021-05-21 20:53:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-05-21 20:53:41,482 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-05-21 20:53:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:41,482 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-05-21 20:53:41,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-05-21 20:53:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:41,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:41,483 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:41,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:41,684 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 115 times [2021-05-21 20:53:41,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:41,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127971170] [2021-05-21 20:53:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:41,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127971170] [2021-05-21 20:53:41,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127971170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424039418] [2021-05-21 20:53:41,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:41,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:42,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424039418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:42,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:42,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:42,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584835562] [2021-05-21 20:53:42,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:42,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:42,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:42,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:42,238 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:42,953 INFO L93 Difference]: Finished difference Result 1926 states and 4776 transitions. [2021-05-21 20:53:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:53:42,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:42,955 INFO L225 Difference]: With dead ends: 1926 [2021-05-21 20:53:42,955 INFO L226 Difference]: Without dead ends: 1896 [2021-05-21 20:53:42,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:53:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-05-21 20:53:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1704. [2021-05-21 20:53:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-05-21 20:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-05-21 20:53:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:42,969 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-05-21 20:53:42,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-05-21 20:53:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:42,970 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:42,970 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:43,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1534 [2021-05-21 20:53:43,185 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 116 times [2021-05-21 20:53:43,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:43,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719225601] [2021-05-21 20:53:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:43,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719225601] [2021-05-21 20:53:43,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719225601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425827238] [2021-05-21 20:53:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:43,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:43,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:43,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425827238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:43,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:43,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:43,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997857611] [2021-05-21 20:53:43,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:43,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:43,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:43,835 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:44,349 INFO L93 Difference]: Finished difference Result 1870 states and 4636 transitions. [2021-05-21 20:53:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:53:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:44,351 INFO L225 Difference]: With dead ends: 1870 [2021-05-21 20:53:44,351 INFO L226 Difference]: Without dead ends: 1840 [2021-05-21 20:53:44,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-05-21 20:53:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1720. [2021-05-21 20:53:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 2.4904013961605584) internal successors, (4281), 1719 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 4281 transitions. [2021-05-21 20:53:44,365 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 4281 transitions. Word has length 32 [2021-05-21 20:53:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:44,365 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 4281 transitions. [2021-05-21 20:53:44,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 4281 transitions. [2021-05-21 20:53:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:44,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:44,367 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:44,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:44,581 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 117 times [2021-05-21 20:53:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:44,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521368548] [2021-05-21 20:53:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:44,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:44,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521368548] [2021-05-21 20:53:44,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521368548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:44,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340169131] [2021-05-21 20:53:44,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:44,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:53:44,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:44,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:45,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340169131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:45,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:45,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:45,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537218628] [2021-05-21 20:53:45,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:45,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:45,287 INFO L87 Difference]: Start difference. First operand 1720 states and 4281 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:45,864 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-05-21 20:53:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:53:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:45,866 INFO L225 Difference]: With dead ends: 2022 [2021-05-21 20:53:45,867 INFO L226 Difference]: Without dead ends: 1984 [2021-05-21 20:53:45,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 728.0ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:53:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-05-21 20:53:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1744. [2021-05-21 20:53:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.4905335628227196) internal successors, (4341), 1743 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4341 transitions. [2021-05-21 20:53:45,883 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4341 transitions. Word has length 32 [2021-05-21 20:53:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:45,883 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 4341 transitions. [2021-05-21 20:53:45,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4341 transitions. [2021-05-21 20:53:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:45,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:45,884 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:46,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1562 [2021-05-21 20:53:46,086 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 118 times [2021-05-21 20:53:46,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:46,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932222205] [2021-05-21 20:53:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:46,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:46,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932222205] [2021-05-21 20:53:46,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932222205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:46,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347811966] [2021-05-21 20:53:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:46,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:46,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:46,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347811966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:46,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:46,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:46,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934075704] [2021-05-21 20:53:46,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:46,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:46,729 INFO L87 Difference]: Start difference. First operand 1744 states and 4341 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:47,255 INFO L93 Difference]: Finished difference Result 1910 states and 4736 transitions. [2021-05-21 20:53:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:53:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:47,256 INFO L225 Difference]: With dead ends: 1910 [2021-05-21 20:53:47,256 INFO L226 Difference]: Without dead ends: 1880 [2021-05-21 20:53:47,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 870.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:53:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-05-21 20:53:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1752. [2021-05-21 20:53:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-05-21 20:53:47,270 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-05-21 20:53:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:47,270 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-05-21 20:53:47,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-05-21 20:53:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:47,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:47,272 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:47,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1580,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:47,472 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:47,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 119 times [2021-05-21 20:53:47,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:47,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321314830] [2021-05-21 20:53:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:47,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321314830] [2021-05-21 20:53:47,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321314830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278369120] [2021-05-21 20:53:47,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:47,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:53:47,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:47,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:47,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278369120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:48,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:48,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:48,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527365246] [2021-05-21 20:53:48,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:48,012 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:48,482 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-05-21 20:53:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:48,484 INFO L225 Difference]: With dead ends: 1950 [2021-05-21 20:53:48,484 INFO L226 Difference]: Without dead ends: 1928 [2021-05-21 20:53:48,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-21 20:53:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1752. [2021-05-21 20:53:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-05-21 20:53:48,499 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-05-21 20:53:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:48,500 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-05-21 20:53:48,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-05-21 20:53:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:48,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:48,501 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:48,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-05-21 20:53:48,702 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 120 times [2021-05-21 20:53:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:48,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525225459] [2021-05-21 20:53:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:48,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525225459] [2021-05-21 20:53:48,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525225459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517181743] [2021-05-21 20:53:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:48,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:53:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:49,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517181743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:49,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:49,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:49,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308141490] [2021-05-21 20:53:49,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:49,362 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:50,188 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-05-21 20:53:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:53:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:50,190 INFO L225 Difference]: With dead ends: 1950 [2021-05-21 20:53:50,190 INFO L226 Difference]: Without dead ends: 1928 [2021-05-21 20:53:50,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1070.9ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:53:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-21 20:53:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1776. [2021-05-21 20:53:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-05-21 20:53:50,204 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-05-21 20:53:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:50,204 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-05-21 20:53:50,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-05-21 20:53:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:50,206 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:50,206 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:50,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-05-21 20:53:50,421 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:50,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 121 times [2021-05-21 20:53:50,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:50,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405485518] [2021-05-21 20:53:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:50,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:50,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405485518] [2021-05-21 20:53:50,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405485518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605156652] [2021-05-21 20:53:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:50,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605156652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:50,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:50,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:50,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120290111] [2021-05-21 20:53:50,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:50,978 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:51,692 INFO L93 Difference]: Finished difference Result 1942 states and 4820 transitions. [2021-05-21 20:53:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:51,694 INFO L225 Difference]: With dead ends: 1942 [2021-05-21 20:53:51,694 INFO L226 Difference]: Without dead ends: 1920 [2021-05-21 20:53:51,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-05-21 20:53:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1776. [2021-05-21 20:53:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-05-21 20:53:51,710 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-05-21 20:53:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:51,710 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-05-21 20:53:51,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-05-21 20:53:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:51,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:51,712 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:51,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-05-21 20:53:51,925 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 122 times [2021-05-21 20:53:51,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:51,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475592573] [2021-05-21 20:53:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:52,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:52,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475592573] [2021-05-21 20:53:52,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475592573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290714417] [2021-05-21 20:53:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:52,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:53:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:52,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290714417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:52,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:52,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844529884] [2021-05-21 20:53:52,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:52,479 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:53,163 INFO L93 Difference]: Finished difference Result 1966 states and 4872 transitions. [2021-05-21 20:53:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:53:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:53,165 INFO L225 Difference]: With dead ends: 1966 [2021-05-21 20:53:53,165 INFO L226 Difference]: Without dead ends: 1928 [2021-05-21 20:53:53,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 932.7ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:53:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-21 20:53:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1792. [2021-05-21 20:53:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 2.490787269681742) internal successors, (4461), 1791 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4461 transitions. [2021-05-21 20:53:53,179 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4461 transitions. Word has length 32 [2021-05-21 20:53:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:53,180 INFO L482 AbstractCegarLoop]: Abstraction has 1792 states and 4461 transitions. [2021-05-21 20:53:53,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4461 transitions. [2021-05-21 20:53:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:53,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:53,181 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:53,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1661,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:53,383 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:53,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269506, now seen corresponding path program 123 times [2021-05-21 20:53:53,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:53,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67994469] [2021-05-21 20:53:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:53,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:53,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67994469] [2021-05-21 20:53:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67994469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:53,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299790568] [2021-05-21 20:53:53,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:53,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:53:53,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:54,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299790568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:54,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:54,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:54,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298136168] [2021-05-21 20:53:54,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:54,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:54,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:54,004 INFO L87 Difference]: Start difference. First operand 1792 states and 4461 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:54,544 INFO L93 Difference]: Finished difference Result 1966 states and 4876 transitions. [2021-05-21 20:53:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:54,546 INFO L225 Difference]: With dead ends: 1966 [2021-05-21 20:53:54,546 INFO L226 Difference]: Without dead ends: 1936 [2021-05-21 20:53:54,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 836.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-05-21 20:53:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1800. [2021-05-21 20:53:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.49082823790995) internal successors, (4481), 1799 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 4481 transitions. [2021-05-21 20:53:54,561 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 4481 transitions. Word has length 32 [2021-05-21 20:53:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:54,561 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 4481 transitions. [2021-05-21 20:53:54,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 4481 transitions. [2021-05-21 20:53:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:54,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:54,562 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:54,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-05-21 20:53:54,763 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 124 times [2021-05-21 20:53:54,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:54,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072928238] [2021-05-21 20:53:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:54,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072928238] [2021-05-21 20:53:54,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072928238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264772534] [2021-05-21 20:53:54,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:54,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:53:54,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264772534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:55,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:55,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706193704] [2021-05-21 20:53:55,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:55,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:55,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:55,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:55,387 INFO L87 Difference]: Start difference. First operand 1800 states and 4481 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:56,043 INFO L93 Difference]: Finished difference Result 2102 states and 5216 transitions. [2021-05-21 20:53:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:56,046 INFO L225 Difference]: With dead ends: 2102 [2021-05-21 20:53:56,046 INFO L226 Difference]: Without dead ends: 2072 [2021-05-21 20:53:56,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 927.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-05-21 20:53:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1816. [2021-05-21 20:53:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.4909090909090907) internal successors, (4521), 1815 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 4521 transitions. [2021-05-21 20:53:56,061 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 4521 transitions. Word has length 32 [2021-05-21 20:53:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:56,061 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 4521 transitions. [2021-05-21 20:53:56,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 4521 transitions. [2021-05-21 20:53:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:56,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:56,063 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:56,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1701 [2021-05-21 20:53:56,263 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash -59085894, now seen corresponding path program 125 times [2021-05-21 20:53:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:56,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468290486] [2021-05-21 20:53:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:56,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468290486] [2021-05-21 20:53:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468290486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42512914] [2021-05-21 20:53:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:56,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:53:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:56,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42512914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:56,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:56,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:56,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922426042] [2021-05-21 20:53:56,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:56,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:56,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:56,903 INFO L87 Difference]: Start difference. First operand 1816 states and 4521 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:57,547 INFO L93 Difference]: Finished difference Result 2070 states and 5140 transitions. [2021-05-21 20:53:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:53:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:57,549 INFO L225 Difference]: With dead ends: 2070 [2021-05-21 20:53:57,549 INFO L226 Difference]: Without dead ends: 2040 [2021-05-21 20:53:57,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 990.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:53:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-05-21 20:53:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1840. [2021-05-21 20:53:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 2.4910277324632952) internal successors, (4581), 1839 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 4581 transitions. [2021-05-21 20:53:57,565 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 4581 transitions. Word has length 32 [2021-05-21 20:53:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:57,565 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 4581 transitions. [2021-05-21 20:53:57,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 4581 transitions. [2021-05-21 20:53:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:57,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:57,567 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:57,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:57,767 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 126 times [2021-05-21 20:53:57,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:57,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840561268] [2021-05-21 20:53:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:57,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:57,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840561268] [2021-05-21 20:53:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840561268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:57,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543275787] [2021-05-21 20:53:57,958 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:57,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:53:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:53:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:58,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543275787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:58,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:58,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:58,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618696242] [2021-05-21 20:53:58,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:58,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:58,435 INFO L87 Difference]: Start difference. First operand 1840 states and 4581 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:53:59,116 INFO L93 Difference]: Finished difference Result 2150 states and 5328 transitions. [2021-05-21 20:53:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:53:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:53:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:53:59,118 INFO L225 Difference]: With dead ends: 2150 [2021-05-21 20:53:59,118 INFO L226 Difference]: Without dead ends: 2104 [2021-05-21 20:53:59,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:53:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-05-21 20:53:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1864. [2021-05-21 20:53:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.4911433172302737) internal successors, (4641), 1863 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4641 transitions. [2021-05-21 20:53:59,133 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4641 transitions. Word has length 32 [2021-05-21 20:53:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:53:59,133 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 4641 transitions. [2021-05-21 20:53:59,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:53:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4641 transitions. [2021-05-21 20:53:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:53:59,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:53:59,135 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:53:59,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1745,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:59,335 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:53:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:53:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 690028670, now seen corresponding path program 127 times [2021-05-21 20:53:59,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:53:59,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360213421] [2021-05-21 20:53:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:53:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:59,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:53:59,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360213421] [2021-05-21 20:53:59,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360213421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:59,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481140554] [2021-05-21 20:53:59,523 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:53:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:53:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:53:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:53:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:53:59,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481140554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:53:59,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:53:59,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:53:59,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368796141] [2021-05-21 20:53:59,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:53:59,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:53:59,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:53:59,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:53:59,843 INFO L87 Difference]: Start difference. First operand 1864 states and 4641 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:00,228 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-05-21 20:54:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:54:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:00,230 INFO L225 Difference]: With dead ends: 2022 [2021-05-21 20:54:00,230 INFO L226 Difference]: Without dead ends: 1984 [2021-05-21 20:54:00,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:54:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-05-21 20:54:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1880. [2021-05-21 20:54:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.491218733368813) internal successors, (4681), 1879 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4681 transitions. [2021-05-21 20:54:00,246 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4681 transitions. Word has length 32 [2021-05-21 20:54:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:00,246 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 4681 transitions. [2021-05-21 20:54:00,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4681 transitions. [2021-05-21 20:54:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:00,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:00,247 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:00,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-05-21 20:54:00,448 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 128 times [2021-05-21 20:54:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:00,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172633265] [2021-05-21 20:54:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172633265] [2021-05-21 20:54:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172633265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366627225] [2021-05-21 20:54:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:00,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:54:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366627225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:01,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930975016] [2021-05-21 20:54:01,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:01,053 INFO L87 Difference]: Start difference. First operand 1880 states and 4681 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:01,584 INFO L93 Difference]: Finished difference Result 2126 states and 5272 transitions. [2021-05-21 20:54:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:54:01,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:01,586 INFO L225 Difference]: With dead ends: 2126 [2021-05-21 20:54:01,586 INFO L226 Difference]: Without dead ends: 2080 [2021-05-21 20:54:01,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 811.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:54:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-05-21 20:54:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1920. [2021-05-21 20:54:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 2.4914017717561228) internal successors, (4781), 1919 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 4781 transitions. [2021-05-21 20:54:01,602 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 4781 transitions. Word has length 32 [2021-05-21 20:54:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:01,602 INFO L482 AbstractCegarLoop]: Abstraction has 1920 states and 4781 transitions. [2021-05-21 20:54:01,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 4781 transitions. [2021-05-21 20:54:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:01,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:01,604 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:01,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-05-21 20:54:01,817 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash -587357826, now seen corresponding path program 129 times [2021-05-21 20:54:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:01,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972812196] [2021-05-21 20:54:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:01,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:01,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972812196] [2021-05-21 20:54:01,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972812196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:01,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420120177] [2021-05-21 20:54:01,986 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:02,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:54:02,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:02,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:54:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:02,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420120177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:02,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:02,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427478123] [2021-05-21 20:54:02,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:02,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:02,313 INFO L87 Difference]: Start difference. First operand 1920 states and 4781 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:02,871 INFO L93 Difference]: Finished difference Result 2078 states and 5152 transitions. [2021-05-21 20:54:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:54:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:02,874 INFO L225 Difference]: With dead ends: 2078 [2021-05-21 20:54:02,874 INFO L226 Difference]: Without dead ends: 2040 [2021-05-21 20:54:02,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:54:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-05-21 20:54:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1912. [2021-05-21 20:54:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-05-21 20:54:02,891 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-05-21 20:54:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-05-21 20:54:02,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-05-21 20:54:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:02,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:02,892 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:03,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1798 [2021-05-21 20:54:03,093 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1197117250, now seen corresponding path program 130 times [2021-05-21 20:54:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:03,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312903168] [2021-05-21 20:54:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:03,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:03,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312903168] [2021-05-21 20:54:03,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312903168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:03,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897182867] [2021-05-21 20:54:03,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:03,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:54:03,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:03,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:03,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897182867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:03,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:03,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:03,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109925707] [2021-05-21 20:54:03,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:03,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:03,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:03,653 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:04,155 INFO L93 Difference]: Finished difference Result 2070 states and 5132 transitions. [2021-05-21 20:54:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:54:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:04,157 INFO L225 Difference]: With dead ends: 2070 [2021-05-21 20:54:04,157 INFO L226 Difference]: Without dead ends: 2032 [2021-05-21 20:54:04,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 795.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:54:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-05-21 20:54:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1912. [2021-05-21 20:54:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-05-21 20:54:04,171 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-05-21 20:54:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:04,171 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-05-21 20:54:04,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-05-21 20:54:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:04,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:04,173 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:04,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:04,373 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:04,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:04,374 INFO L82 PathProgramCache]: Analyzing trace with hash 991178818, now seen corresponding path program 131 times [2021-05-21 20:54:04,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:04,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891263265] [2021-05-21 20:54:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:04,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891263265] [2021-05-21 20:54:04,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891263265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45796834] [2021-05-21 20:54:04,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:04,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:54:04,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:04,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45796834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:04,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:04,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:04,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70437291] [2021-05-21 20:54:04,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:04,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:04,956 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:05,507 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-05-21 20:54:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:54:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:05,509 INFO L225 Difference]: With dead ends: 2142 [2021-05-21 20:54:05,509 INFO L226 Difference]: Without dead ends: 2112 [2021-05-21 20:54:05,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 856.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:54:05,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-05-21 20:54:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1928. [2021-05-21 20:54:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.4914374675661652) internal successors, (4801), 1927 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 4801 transitions. [2021-05-21 20:54:05,524 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 4801 transitions. Word has length 32 [2021-05-21 20:54:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:05,524 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 4801 transitions. [2021-05-21 20:54:05,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 4801 transitions. [2021-05-21 20:54:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:05,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:05,526 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:05,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:05,726 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 132 times [2021-05-21 20:54:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:05,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554867061] [2021-05-21 20:54:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:05,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:05,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554867061] [2021-05-21 20:54:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554867061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:05,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593497777] [2021-05-21 20:54:05,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:05,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:54:05,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:05,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:05,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:06,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593497777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:06,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:06,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:06,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943456086] [2021-05-21 20:54:06,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:06,261 INFO L87 Difference]: Start difference. First operand 1928 states and 4801 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:06,784 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-05-21 20:54:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:06,786 INFO L225 Difference]: With dead ends: 2142 [2021-05-21 20:54:06,786 INFO L226 Difference]: Without dead ends: 2112 [2021-05-21 20:54:06,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-05-21 20:54:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1944. [2021-05-21 20:54:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 2.4915079773546065) internal successors, (4841), 1943 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 4841 transitions. [2021-05-21 20:54:06,802 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 4841 transitions. Word has length 32 [2021-05-21 20:54:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:06,802 INFO L482 AbstractCegarLoop]: Abstraction has 1944 states and 4841 transitions. [2021-05-21 20:54:06,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 4841 transitions. [2021-05-21 20:54:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:06,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:06,803 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:07,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:07,004 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 133 times [2021-05-21 20:54:07,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:07,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430869147] [2021-05-21 20:54:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:07,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430869147] [2021-05-21 20:54:07,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430869147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395662956] [2021-05-21 20:54:07,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:54:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:07,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395662956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:07,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:07,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:07,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935719345] [2021-05-21 20:54:07,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:07,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:07,507 INFO L87 Difference]: Start difference. First operand 1944 states and 4841 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:07,975 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-05-21 20:54:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:54:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:07,977 INFO L225 Difference]: With dead ends: 2238 [2021-05-21 20:54:07,978 INFO L226 Difference]: Without dead ends: 2200 [2021-05-21 20:54:07,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:54:07,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-05-21 20:54:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1976. [2021-05-21 20:54:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.4916455696202533) internal successors, (4921), 1975 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 4921 transitions. [2021-05-21 20:54:07,996 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 4921 transitions. Word has length 32 [2021-05-21 20:54:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:07,996 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 4921 transitions. [2021-05-21 20:54:07,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 4921 transitions. [2021-05-21 20:54:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:07,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:07,997 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:08,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-05-21 20:54:08,198 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 134 times [2021-05-21 20:54:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:08,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868392691] [2021-05-21 20:54:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868392691] [2021-05-21 20:54:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868392691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548648970] [2021-05-21 20:54:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:08,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:54:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548648970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:08,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:08,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:08,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791309863] [2021-05-21 20:54:08,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:08,719 INFO L87 Difference]: Start difference. First operand 1976 states and 4921 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:09,491 INFO L93 Difference]: Finished difference Result 2278 states and 5656 transitions. [2021-05-21 20:54:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:54:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:09,493 INFO L225 Difference]: With dead ends: 2278 [2021-05-21 20:54:09,493 INFO L226 Difference]: Without dead ends: 2248 [2021-05-21 20:54:09,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 986.4ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:54:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-05-21 20:54:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1992. [2021-05-21 20:54:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 2.4917127071823204) internal successors, (4961), 1991 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 4961 transitions. [2021-05-21 20:54:09,509 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 4961 transitions. Word has length 32 [2021-05-21 20:54:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:09,509 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 4961 transitions. [2021-05-21 20:54:09,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 4961 transitions. [2021-05-21 20:54:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:09,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:09,511 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:09,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-05-21 20:54:09,711 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 135 times [2021-05-21 20:54:09,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:09,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522868142] [2021-05-21 20:54:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:09,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:09,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522868142] [2021-05-21 20:54:09,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522868142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:09,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873259273] [2021-05-21 20:54:09,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:09,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:54:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:10,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873259273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:10,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:10,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:10,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386371117] [2021-05-21 20:54:10,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:10,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:10,278 INFO L87 Difference]: Start difference. First operand 1992 states and 4961 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:10,838 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-05-21 20:54:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:10,840 INFO L225 Difference]: With dead ends: 2174 [2021-05-21 20:54:10,840 INFO L226 Difference]: Without dead ends: 2136 [2021-05-21 20:54:10,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-05-21 20:54:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2008. [2021-05-21 20:54:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.491778774289985) internal successors, (5001), 2007 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5001 transitions. [2021-05-21 20:54:10,855 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5001 transitions. Word has length 32 [2021-05-21 20:54:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:10,855 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 5001 transitions. [2021-05-21 20:54:10,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5001 transitions. [2021-05-21 20:54:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:10,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:10,857 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:11,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1888,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:11,059 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:11,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1759088314, now seen corresponding path program 136 times [2021-05-21 20:54:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:11,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529979915] [2021-05-21 20:54:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:11,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:11,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529979915] [2021-05-21 20:54:11,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529979915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:11,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931610477] [2021-05-21 20:54:11,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:11,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:54:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:11,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931610477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:11,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:11,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:11,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516421004] [2021-05-21 20:54:11,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:11,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:11,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:11,651 INFO L87 Difference]: Start difference. First operand 2008 states and 5001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:12,241 INFO L93 Difference]: Finished difference Result 2230 states and 5532 transitions. [2021-05-21 20:54:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:54:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:12,242 INFO L225 Difference]: With dead ends: 2230 [2021-05-21 20:54:12,243 INFO L226 Difference]: Without dead ends: 2192 [2021-05-21 20:54:12,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 857.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:54:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-05-21 20:54:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2024. [2021-05-21 20:54:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-05-21 20:54:12,258 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-05-21 20:54:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:12,258 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-05-21 20:54:12,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-05-21 20:54:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:12,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:12,260 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:12,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1904 [2021-05-21 20:54:12,460 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 137 times [2021-05-21 20:54:12,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:12,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701610028] [2021-05-21 20:54:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:12,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701610028] [2021-05-21 20:54:12,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701610028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454883023] [2021-05-21 20:54:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:12,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:54:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:12,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:13,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454883023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:13,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:13,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:13,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122732619] [2021-05-21 20:54:13,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:13,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:13,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:13,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:13,104 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:13,447 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-05-21 20:54:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:13,756 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-05-21 20:54:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:13,758 INFO L225 Difference]: With dead ends: 2238 [2021-05-21 20:54:13,758 INFO L226 Difference]: Without dead ends: 2200 [2021-05-21 20:54:13,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 996.1ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-05-21 20:54:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2032. [2021-05-21 20:54:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.4918759231905465) internal successors, (5061), 2031 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5061 transitions. [2021-05-21 20:54:13,775 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5061 transitions. Word has length 32 [2021-05-21 20:54:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:13,775 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5061 transitions. [2021-05-21 20:54:13,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5061 transitions. [2021-05-21 20:54:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:13,777 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:13,777 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:13,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1918 [2021-05-21 20:54:13,977 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 138 times [2021-05-21 20:54:13,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:13,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206285882] [2021-05-21 20:54:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:14,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206285882] [2021-05-21 20:54:14,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206285882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770859377] [2021-05-21 20:54:14,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:14,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:54:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:14,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:14,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:14,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770859377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:14,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:14,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:14,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569152966] [2021-05-21 20:54:14,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:14,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:14,773 INFO L87 Difference]: Start difference. First operand 2032 states and 5061 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:15,521 INFO L93 Difference]: Finished difference Result 2286 states and 5680 transitions. [2021-05-21 20:54:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:54:15,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:15,523 INFO L225 Difference]: With dead ends: 2286 [2021-05-21 20:54:15,523 INFO L226 Difference]: Without dead ends: 2264 [2021-05-21 20:54:15,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1228.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:54:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-05-21 20:54:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2024. [2021-05-21 20:54:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-05-21 20:54:15,538 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-05-21 20:54:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:15,539 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-05-21 20:54:15,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-05-21 20:54:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:15,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:15,540 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:15,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:15,740 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 139 times [2021-05-21 20:54:15,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:15,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694083191] [2021-05-21 20:54:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:15,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:15,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694083191] [2021-05-21 20:54:15,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694083191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:15,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535460705] [2021-05-21 20:54:15,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:16,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535460705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:16,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:16,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:16,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802967524] [2021-05-21 20:54:16,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:16,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:16,298 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:16,897 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-05-21 20:54:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:54:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:16,900 INFO L225 Difference]: With dead ends: 2174 [2021-05-21 20:54:16,900 INFO L226 Difference]: Without dead ends: 2136 [2021-05-21 20:54:16,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 884.7ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:54:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-05-21 20:54:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2024. [2021-05-21 20:54:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-05-21 20:54:16,915 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-05-21 20:54:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:16,916 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-05-21 20:54:16,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-05-21 20:54:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:16,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:16,917 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:17,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:17,117 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 140 times [2021-05-21 20:54:17,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:17,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565126261] [2021-05-21 20:54:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:17,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:17,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565126261] [2021-05-21 20:54:17,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565126261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:17,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33770734] [2021-05-21 20:54:17,301 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:17,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:54:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:17,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33770734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:17,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:17,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:17,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389065372] [2021-05-21 20:54:17,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:17,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:17,760 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:18,491 INFO L93 Difference]: Finished difference Result 2286 states and 5676 transitions. [2021-05-21 20:54:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:54:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:18,493 INFO L225 Difference]: With dead ends: 2286 [2021-05-21 20:54:18,493 INFO L226 Difference]: Without dead ends: 2248 [2021-05-21 20:54:18,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1062.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:54:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-05-21 20:54:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2024. [2021-05-21 20:54:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-05-21 20:54:18,509 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-05-21 20:54:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:18,509 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-05-21 20:54:18,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-05-21 20:54:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:18,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:18,511 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:18,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1973 [2021-05-21 20:54:18,717 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash 85430458, now seen corresponding path program 141 times [2021-05-21 20:54:18,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:18,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370079860] [2021-05-21 20:54:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:18,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:18,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370079860] [2021-05-21 20:54:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370079860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:18,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841113330] [2021-05-21 20:54:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:18,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:54:18,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:18,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:19,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841113330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:19,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:19,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31333567] [2021-05-21 20:54:19,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:19,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:19,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:19,315 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:20,023 INFO L93 Difference]: Finished difference Result 2206 states and 5476 transitions. [2021-05-21 20:54:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:54:20,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:20,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:20,025 INFO L225 Difference]: With dead ends: 2206 [2021-05-21 20:54:20,025 INFO L226 Difference]: Without dead ends: 2176 [2021-05-21 20:54:20,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:54:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-21 20:54:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2048. [2021-05-21 20:54:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 2.4919394235466537) internal successors, (5101), 2047 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5101 transitions. [2021-05-21 20:54:20,041 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5101 transitions. Word has length 32 [2021-05-21 20:54:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:20,041 INFO L482 AbstractCegarLoop]: Abstraction has 2048 states and 5101 transitions. [2021-05-21 20:54:20,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5101 transitions. [2021-05-21 20:54:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:20,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:20,043 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:20,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-05-21 20:54:20,243 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 142 times [2021-05-21 20:54:20,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:20,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521651831] [2021-05-21 20:54:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:20,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521651831] [2021-05-21 20:54:20,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521651831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826730594] [2021-05-21 20:54:20,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:20,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:54:20,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:20,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:20,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826730594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:20,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:20,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:20,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102123553] [2021-05-21 20:54:20,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:20,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:20,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:20,841 INFO L87 Difference]: Start difference. First operand 2048 states and 5101 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:21,491 INFO L93 Difference]: Finished difference Result 2278 states and 5660 transitions. [2021-05-21 20:54:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:54:21,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:21,493 INFO L225 Difference]: With dead ends: 2278 [2021-05-21 20:54:21,493 INFO L226 Difference]: Without dead ends: 2248 [2021-05-21 20:54:21,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:54:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-05-21 20:54:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2056. [2021-05-21 20:54:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.491970802919708) internal successors, (5121), 2055 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5121 transitions. [2021-05-21 20:54:21,510 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5121 transitions. Word has length 32 [2021-05-21 20:54:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:21,510 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5121 transitions. [2021-05-21 20:54:21,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5121 transitions. [2021-05-21 20:54:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:21,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:21,511 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:21,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2010,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:21,712 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 143 times [2021-05-21 20:54:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:21,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643305086] [2021-05-21 20:54:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:21,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643305086] [2021-05-21 20:54:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643305086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:21,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456933453] [2021-05-21 20:54:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:21,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:54:21,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:22,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456933453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:22,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:22,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:22,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399623102] [2021-05-21 20:54:22,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:22,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:22,413 INFO L87 Difference]: Start difference. First operand 2056 states and 5121 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:23,051 INFO L93 Difference]: Finished difference Result 2238 states and 5556 transitions. [2021-05-21 20:54:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:23,053 INFO L225 Difference]: With dead ends: 2238 [2021-05-21 20:54:23,053 INFO L226 Difference]: Without dead ends: 2208 [2021-05-21 20:54:23,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1022.1ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-05-21 20:54:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2080. [2021-05-21 20:54:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.492063492063492) internal successors, (5181), 2079 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5181 transitions. [2021-05-21 20:54:23,070 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5181 transitions. Word has length 32 [2021-05-21 20:54:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:23,070 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5181 transitions. [2021-05-21 20:54:23,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5181 transitions. [2021-05-21 20:54:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:23,071 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:23,071 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:23,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2026 [2021-05-21 20:54:23,272 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 144 times [2021-05-21 20:54:23,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:23,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867139405] [2021-05-21 20:54:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:23,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:23,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867139405] [2021-05-21 20:54:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867139405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:23,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37880545] [2021-05-21 20:54:23,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:23,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:54:23,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:54:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:23,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37880545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011637784] [2021-05-21 20:54:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:23,733 INFO L87 Difference]: Start difference. First operand 2080 states and 5181 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:24,041 INFO L93 Difference]: Finished difference Result 2198 states and 5456 transitions. [2021-05-21 20:54:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:54:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:24,043 INFO L225 Difference]: With dead ends: 2198 [2021-05-21 20:54:24,043 INFO L226 Difference]: Without dead ends: 2176 [2021-05-21 20:54:24,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:54:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-21 20:54:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2064. [2021-05-21 20:54:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.49006301502666) internal successors, (5137), 2063 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5137 transitions. [2021-05-21 20:54:24,060 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5137 transitions. Word has length 32 [2021-05-21 20:54:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:24,060 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5137 transitions. [2021-05-21 20:54:24,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5137 transitions. [2021-05-21 20:54:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:24,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:24,062 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:24,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2040,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:24,262 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash 619422726, now seen corresponding path program 145 times [2021-05-21 20:54:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:24,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805482273] [2021-05-21 20:54:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:24,654 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 7 [2021-05-21 20:54:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:24,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805482273] [2021-05-21 20:54:24,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805482273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303762469] [2021-05-21 20:54:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:54:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:24,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303762469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:24,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:24,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:24,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997542178] [2021-05-21 20:54:24,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:24,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:24,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:24,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:24,983 INFO L87 Difference]: Start difference. First operand 2064 states and 5137 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:25,347 INFO L93 Difference]: Finished difference Result 2230 states and 5536 transitions. [2021-05-21 20:54:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:25,349 INFO L225 Difference]: With dead ends: 2230 [2021-05-21 20:54:25,349 INFO L226 Difference]: Without dead ends: 2208 [2021-05-21 20:54:25,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-05-21 20:54:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2072. [2021-05-21 20:54:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-05-21 20:54:25,367 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-05-21 20:54:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:25,367 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-05-21 20:54:25,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-05-21 20:54:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:25,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:25,369 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:25,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-05-21 20:54:25,569 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1540223554, now seen corresponding path program 146 times [2021-05-21 20:54:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:25,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457533976] [2021-05-21 20:54:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:25,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:25,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457533976] [2021-05-21 20:54:25,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457533976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:25,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017670465] [2021-05-21 20:54:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:25,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:54:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:26,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017670465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:26,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:26,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:26,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800101723] [2021-05-21 20:54:26,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:26,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:26,241 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:26,752 INFO L93 Difference]: Finished difference Result 2246 states and 5572 transitions. [2021-05-21 20:54:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:26,754 INFO L225 Difference]: With dead ends: 2246 [2021-05-21 20:54:26,754 INFO L226 Difference]: Without dead ends: 2216 [2021-05-21 20:54:26,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-05-21 20:54:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2072. [2021-05-21 20:54:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-05-21 20:54:26,771 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-05-21 20:54:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:26,771 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-05-21 20:54:26,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-05-21 20:54:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:26,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:26,772 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2066,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:26,973 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1737475334, now seen corresponding path program 147 times [2021-05-21 20:54:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423019174] [2021-05-21 20:54:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:28,490 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 56 DAG size of output: 7 [2021-05-21 20:54:32,478 WARN L205 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 69 DAG size of output: 12 [2021-05-21 20:54:37,724 WARN L205 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2021-05-21 20:54:38,025 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-05-21 20:54:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:38,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423019174] [2021-05-21 20:54:38,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423019174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876208186] [2021-05-21 20:54:38,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:38,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:54:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:38,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:38,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876208186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:38,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:38,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:38,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368052168] [2021-05-21 20:54:38,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:38,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:38,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:38,390 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:39,116 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-05-21 20:54:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:54:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:39,118 INFO L225 Difference]: With dead ends: 2294 [2021-05-21 20:54:39,118 INFO L226 Difference]: Without dead ends: 2264 [2021-05-21 20:54:39,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 893.0ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:54:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-05-21 20:54:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2096. [2021-05-21 20:54:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-05-21 20:54:39,134 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-05-21 20:54:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:39,134 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-05-21 20:54:39,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-05-21 20:54:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:39,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:39,135 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:39,336 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:39,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 148 times [2021-05-21 20:54:39,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:39,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908722409] [2021-05-21 20:54:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:39,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:39,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908722409] [2021-05-21 20:54:39,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908722409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:39,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558823531] [2021-05-21 20:54:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:39,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:54:39,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:39,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558823531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:39,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:39,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:39,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390295409] [2021-05-21 20:54:39,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:39,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:39,904 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:40,418 INFO L93 Difference]: Finished difference Result 2406 states and 5972 transitions. [2021-05-21 20:54:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:40,420 INFO L225 Difference]: With dead ends: 2406 [2021-05-21 20:54:40,420 INFO L226 Difference]: Without dead ends: 2368 [2021-05-21 20:54:40,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 814.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-05-21 20:54:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2080. [2021-05-21 20:54:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-05-21 20:54:40,437 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-05-21 20:54:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:40,437 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-05-21 20:54:40,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-05-21 20:54:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:40,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:40,438 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:40,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-05-21 20:54:40,639 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 149 times [2021-05-21 20:54:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884650154] [2021-05-21 20:54:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:40,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:40,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884650154] [2021-05-21 20:54:40,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884650154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:40,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068007027] [2021-05-21 20:54:40,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:40,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:54:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:40,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068007027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:41,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:41,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:41,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517555627] [2021-05-21 20:54:41,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:41,286 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:42,008 INFO L93 Difference]: Finished difference Result 2414 states and 5996 transitions. [2021-05-21 20:54:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:54:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:42,011 INFO L225 Difference]: With dead ends: 2414 [2021-05-21 20:54:42,011 INFO L226 Difference]: Without dead ends: 2384 [2021-05-21 20:54:42,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1087.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:54:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-05-21 20:54:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2080. [2021-05-21 20:54:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-05-21 20:54:42,028 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-05-21 20:54:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:42,028 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-05-21 20:54:42,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-05-21 20:54:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:42,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:42,030 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:42,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-05-21 20:54:42,241 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 150 times [2021-05-21 20:54:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:42,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702999161] [2021-05-21 20:54:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:42,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702999161] [2021-05-21 20:54:42,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702999161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532231792] [2021-05-21 20:54:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:42,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:54:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:42,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532231792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:42,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:42,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:42,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478260927] [2021-05-21 20:54:42,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:42,801 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:43,436 INFO L93 Difference]: Finished difference Result 2214 states and 5488 transitions. [2021-05-21 20:54:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:54:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:43,438 INFO L225 Difference]: With dead ends: 2214 [2021-05-21 20:54:43,438 INFO L226 Difference]: Without dead ends: 2176 [2021-05-21 20:54:43,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:54:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-21 20:54:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2096. [2021-05-21 20:54:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-05-21 20:54:43,454 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-05-21 20:54:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:43,454 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-05-21 20:54:43,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-05-21 20:54:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:43,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:43,456 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:43,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2152 [2021-05-21 20:54:43,665 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 151 times [2021-05-21 20:54:43,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:43,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801156681] [2021-05-21 20:54:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:43,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:43,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801156681] [2021-05-21 20:54:43,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801156681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:43,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418626171] [2021-05-21 20:54:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:44,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418626171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:44,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:44,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:44,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275304043] [2021-05-21 20:54:44,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:44,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:44,292 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:45,155 INFO L93 Difference]: Finished difference Result 2366 states and 5864 transitions. [2021-05-21 20:54:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:54:45,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:45,157 INFO L225 Difference]: With dead ends: 2366 [2021-05-21 20:54:45,157 INFO L226 Difference]: Without dead ends: 2320 [2021-05-21 20:54:45,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 998.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:54:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-05-21 20:54:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2096. [2021-05-21 20:54:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-05-21 20:54:45,174 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-05-21 20:54:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:45,174 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-05-21 20:54:45,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-05-21 20:54:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:45,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:45,175 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:45,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2170,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:45,390 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 54255998, now seen corresponding path program 152 times [2021-05-21 20:54:45,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:45,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151757922] [2021-05-21 20:54:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:45,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151757922] [2021-05-21 20:54:45,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151757922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:45,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884944283] [2021-05-21 20:54:45,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:45,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:54:45,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:45,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:46,117 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-21 20:54:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884944283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:46,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:46,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451395044] [2021-05-21 20:54:46,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:46,232 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:46,929 INFO L93 Difference]: Finished difference Result 2278 states and 5652 transitions. [2021-05-21 20:54:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:46,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:46,932 INFO L225 Difference]: With dead ends: 2278 [2021-05-21 20:54:46,932 INFO L226 Difference]: Without dead ends: 2248 [2021-05-21 20:54:46,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1247.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-05-21 20:54:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2096. [2021-05-21 20:54:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-05-21 20:54:46,948 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-05-21 20:54:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:46,948 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-05-21 20:54:46,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-05-21 20:54:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:46,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:46,950 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:47,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2187,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:47,150 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 153 times [2021-05-21 20:54:47,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:47,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995903127] [2021-05-21 20:54:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:47,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995903127] [2021-05-21 20:54:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995903127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226145140] [2021-05-21 20:54:47,351 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:47,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:54:47,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:47,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226145140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:47,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:47,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:47,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568388538] [2021-05-21 20:54:47,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:47,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:47,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:47,833 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:48,614 INFO L93 Difference]: Finished difference Result 2414 states and 5992 transitions. [2021-05-21 20:54:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:54:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:48,617 INFO L225 Difference]: With dead ends: 2414 [2021-05-21 20:54:48,617 INFO L226 Difference]: Without dead ends: 2384 [2021-05-21 20:54:48,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1161.6ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:54:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-05-21 20:54:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2104. [2021-05-21 20:54:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.4902520209224916) internal successors, (5237), 2103 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 5237 transitions. [2021-05-21 20:54:48,634 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 5237 transitions. Word has length 32 [2021-05-21 20:54:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:48,634 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 5237 transitions. [2021-05-21 20:54:48,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 5237 transitions. [2021-05-21 20:54:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:48,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:48,636 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:48,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:48,837 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 154 times [2021-05-21 20:54:48,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:48,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922690926] [2021-05-21 20:54:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:49,072 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-05-21 20:54:49,335 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-05-21 20:54:49,607 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-05-21 20:54:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:49,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:49,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922690926] [2021-05-21 20:54:49,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922690926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:49,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912179522] [2021-05-21 20:54:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:49,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:54:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:50,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912179522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:50,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:50,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:50,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061118179] [2021-05-21 20:54:50,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:50,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:50,081 INFO L87 Difference]: Start difference. First operand 2104 states and 5237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:50,730 INFO L93 Difference]: Finished difference Result 2390 states and 5932 transitions. [2021-05-21 20:54:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:54:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:50,733 INFO L225 Difference]: With dead ends: 2390 [2021-05-21 20:54:50,733 INFO L226 Difference]: Without dead ends: 2360 [2021-05-21 20:54:50,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 969.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:54:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-05-21 20:54:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2144. [2021-05-21 20:54:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 2.490433971068595) internal successors, (5337), 2143 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 5337 transitions. [2021-05-21 20:54:50,750 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 5337 transitions. Word has length 32 [2021-05-21 20:54:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:50,750 INFO L482 AbstractCegarLoop]: Abstraction has 2144 states and 5337 transitions. [2021-05-21 20:54:50,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 5337 transitions. [2021-05-21 20:54:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:50,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:50,752 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:50,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2228,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:50,957 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash -320577802, now seen corresponding path program 155 times [2021-05-21 20:54:50,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:50,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773515202] [2021-05-21 20:54:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:51,407 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-05-21 20:54:51,829 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2021-05-21 20:54:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:51,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:51,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773515202] [2021-05-21 20:54:51,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773515202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:51,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138430308] [2021-05-21 20:54:51,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:51,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:54:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138430308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:52,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:52,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652212432] [2021-05-21 20:54:52,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:52,402 INFO L87 Difference]: Start difference. First operand 2144 states and 5337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:53,044 INFO L93 Difference]: Finished difference Result 2326 states and 5772 transitions. [2021-05-21 20:54:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:54:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:53,046 INFO L225 Difference]: With dead ends: 2326 [2021-05-21 20:54:53,046 INFO L226 Difference]: Without dead ends: 2296 [2021-05-21 20:54:53,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1032.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:54:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-21 20:54:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2160. [2021-05-21 20:54:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.490504863362668) internal successors, (5377), 2159 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5377 transitions. [2021-05-21 20:54:53,064 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5377 transitions. Word has length 32 [2021-05-21 20:54:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:53,064 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 5377 transitions. [2021-05-21 20:54:53,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5377 transitions. [2021-05-21 20:54:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:53,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:53,065 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:53,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2244 [2021-05-21 20:54:53,273 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 156 times [2021-05-21 20:54:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:53,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663866481] [2021-05-21 20:54:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:53,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:53,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663866481] [2021-05-21 20:54:53,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663866481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:53,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693862709] [2021-05-21 20:54:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:53,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:54:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:53,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693862709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:53,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:53,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818919640] [2021-05-21 20:54:53,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:53,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:53,912 INFO L87 Difference]: Start difference. First operand 2160 states and 5377 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:54,626 INFO L93 Difference]: Finished difference Result 2374 states and 5888 transitions. [2021-05-21 20:54:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:54:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:54,628 INFO L225 Difference]: With dead ends: 2374 [2021-05-21 20:54:54,629 INFO L226 Difference]: Without dead ends: 2336 [2021-05-21 20:54:54,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1038.2ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:54:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-05-21 20:54:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2168. [2021-05-21 20:54:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 2.490539916935856) internal successors, (5397), 2167 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 5397 transitions. [2021-05-21 20:54:54,647 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 5397 transitions. Word has length 32 [2021-05-21 20:54:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:54,647 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 5397 transitions. [2021-05-21 20:54:54,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 5397 transitions. [2021-05-21 20:54:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:54,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:54,648 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:54,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2263,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:54,849 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 157 times [2021-05-21 20:54:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:54,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734494131] [2021-05-21 20:54:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:55,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734494131] [2021-05-21 20:54:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734494131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982396912] [2021-05-21 20:54:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:55,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:55,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982396912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:55,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:55,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:55,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338323840] [2021-05-21 20:54:55,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:55,428 INFO L87 Difference]: Start difference. First operand 2168 states and 5397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:56,139 INFO L93 Difference]: Finished difference Result 2470 states and 6128 transitions. [2021-05-21 20:54:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:54:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:56,141 INFO L225 Difference]: With dead ends: 2470 [2021-05-21 20:54:56,141 INFO L226 Difference]: Without dead ends: 2432 [2021-05-21 20:54:56,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:54:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-05-21 20:54:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2176. [2021-05-21 20:54:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 2.4905747126436784) internal successors, (5417), 2175 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 5417 transitions. [2021-05-21 20:54:56,159 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 5417 transitions. Word has length 32 [2021-05-21 20:54:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:56,159 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 5417 transitions. [2021-05-21 20:54:56,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 5417 transitions. [2021-05-21 20:54:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:56,161 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:56,161 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:56,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:56,362 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:56,362 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 158 times [2021-05-21 20:54:56,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:56,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147782575] [2021-05-21 20:54:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:56,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:56,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147782575] [2021-05-21 20:54:56,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147782575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:56,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622815260] [2021-05-21 20:54:56,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:56,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:54:56,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:56,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622815260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:56,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:56,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:56,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205032683] [2021-05-21 20:54:56,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:56,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:56,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:56,951 INFO L87 Difference]: Start difference. First operand 2176 states and 5417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:57,513 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-05-21 20:54:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:54:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:57,515 INFO L225 Difference]: With dead ends: 2430 [2021-05-21 20:54:57,515 INFO L226 Difference]: Without dead ends: 2400 [2021-05-21 20:54:57,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 872.6ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:54:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-05-21 20:54:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2192. [2021-05-21 20:54:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-05-21 20:54:57,533 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-05-21 20:54:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:57,533 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-05-21 20:54:57,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-05-21 20:54:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:57,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:57,535 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:57,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-05-21 20:54:57,735 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 159 times [2021-05-21 20:54:57,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:57,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119737177] [2021-05-21 20:54:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:57,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:57,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119737177] [2021-05-21 20:54:57,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119737177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:57,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472628388] [2021-05-21 20:54:57,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:57,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:54:57,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:54:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:58,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472628388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:58,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:54:58,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:54:58,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708156972] [2021-05-21 20:54:58,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:54:58,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:54:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:54:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:54:58,446 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:54:59,187 INFO L93 Difference]: Finished difference Result 2486 states and 6168 transitions. [2021-05-21 20:54:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:54:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:54:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:54:59,189 INFO L225 Difference]: With dead ends: 2486 [2021-05-21 20:54:59,189 INFO L226 Difference]: Without dead ends: 2448 [2021-05-21 20:54:59,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1117.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:54:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-05-21 20:54:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2021-05-21 20:54:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 2.490744920993228) internal successors, (5517), 2215 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 5517 transitions. [2021-05-21 20:54:59,207 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 5517 transitions. Word has length 32 [2021-05-21 20:54:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:54:59,207 INFO L482 AbstractCegarLoop]: Abstraction has 2216 states and 5517 transitions. [2021-05-21 20:54:59,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:54:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 5517 transitions. [2021-05-21 20:54:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:54:59,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:54:59,209 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:54:59,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:59,409 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:54:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:54:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 160 times [2021-05-21 20:54:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:54:59,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500152316] [2021-05-21 20:54:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:54:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:54:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:54:59,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:54:59,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500152316] [2021-05-21 20:54:59,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500152316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:54:59,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101907699] [2021-05-21 20:54:59,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:54:59,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:54:59,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:54:59,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:54:59,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:00,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101907699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:00,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:00,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:00,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055344244] [2021-05-21 20:55:00,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:00,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:00,082 INFO L87 Difference]: Start difference. First operand 2216 states and 5517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:00,757 INFO L93 Difference]: Finished difference Result 2382 states and 5916 transitions. [2021-05-21 20:55:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:55:00,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:00,758 INFO L225 Difference]: With dead ends: 2382 [2021-05-21 20:55:00,758 INFO L226 Difference]: Without dead ends: 2360 [2021-05-21 20:55:00,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1008.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:55:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-05-21 20:55:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2200. [2021-05-21 20:55:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-05-21 20:55:00,776 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-05-21 20:55:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:00,776 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-05-21 20:55:00,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-05-21 20:55:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:00,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:00,778 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:00,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2350,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:00,978 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:00,978 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 161 times [2021-05-21 20:55:00,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:00,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505644579] [2021-05-21 20:55:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:01,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505644579] [2021-05-21 20:55:01,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505644579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751839899] [2021-05-21 20:55:01,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:01,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:55:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:55:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751839899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:01,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:01,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379492412] [2021-05-21 20:55:01,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:01,492 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:02,083 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-05-21 20:55:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:55:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:02,085 INFO L225 Difference]: With dead ends: 2294 [2021-05-21 20:55:02,085 INFO L226 Difference]: Without dead ends: 2264 [2021-05-21 20:55:02,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:55:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-05-21 20:55:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2200. [2021-05-21 20:55:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-05-21 20:55:02,102 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-05-21 20:55:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:02,102 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-05-21 20:55:02,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-05-21 20:55:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:02,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:02,104 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:02,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2369 [2021-05-21 20:55:02,307 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash -836348222, now seen corresponding path program 162 times [2021-05-21 20:55:02,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:02,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079506783] [2021-05-21 20:55:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:02,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:02,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079506783] [2021-05-21 20:55:02,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079506783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:02,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207888674] [2021-05-21 20:55:02,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:02,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:55:02,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:02,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207888674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:02,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:02,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:02,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533112385] [2021-05-21 20:55:02,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:02,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:02,813 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:03,503 INFO L93 Difference]: Finished difference Result 2366 states and 5872 transitions. [2021-05-21 20:55:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:55:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:03,505 INFO L225 Difference]: With dead ends: 2366 [2021-05-21 20:55:03,505 INFO L226 Difference]: Without dead ends: 2336 [2021-05-21 20:55:03,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:55:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-05-21 20:55:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2200. [2021-05-21 20:55:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-05-21 20:55:03,525 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-05-21 20:55:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:03,525 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-05-21 20:55:03,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-05-21 20:55:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:03,527 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:03,527 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:03,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2379 [2021-05-21 20:55:03,728 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 163 times [2021-05-21 20:55:03,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:03,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717702246] [2021-05-21 20:55:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:03,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:03,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717702246] [2021-05-21 20:55:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717702246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:03,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056901381] [2021-05-21 20:55:03,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056901381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:04,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:04,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502409598] [2021-05-21 20:55:04,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:04,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:04,456 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:05,109 INFO L93 Difference]: Finished difference Result 2510 states and 6228 transitions. [2021-05-21 20:55:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:05,112 INFO L225 Difference]: With dead ends: 2510 [2021-05-21 20:55:05,112 INFO L226 Difference]: Without dead ends: 2472 [2021-05-21 20:55:05,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1090.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-05-21 20:55:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2192. [2021-05-21 20:55:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-05-21 20:55:05,130 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-05-21 20:55:05,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:05,130 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-05-21 20:55:05,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-05-21 20:55:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:05,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:05,132 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:05,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2399,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:05,345 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1854182074, now seen corresponding path program 164 times [2021-05-21 20:55:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:05,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822905323] [2021-05-21 20:55:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:05,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:05,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822905323] [2021-05-21 20:55:05,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822905323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:05,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881036907] [2021-05-21 20:55:05,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:05,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:05,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:05,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:06,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881036907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:06,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:06,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:06,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063259891] [2021-05-21 20:55:06,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:06,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:06,119 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:06,311 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-21 20:55:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:06,913 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-05-21 20:55:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:55:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:06,916 INFO L225 Difference]: With dead ends: 2446 [2021-05-21 20:55:06,916 INFO L226 Difference]: Without dead ends: 2408 [2021-05-21 20:55:06,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1256.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:55:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-05-21 20:55:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2208. [2021-05-21 20:55:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.490711372904395) internal successors, (5497), 2207 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5497 transitions. [2021-05-21 20:55:06,934 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5497 transitions. Word has length 32 [2021-05-21 20:55:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:06,934 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 5497 transitions. [2021-05-21 20:55:06,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5497 transitions. [2021-05-21 20:55:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:06,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:06,936 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:07,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2414 [2021-05-21 20:55:07,136 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 165 times [2021-05-21 20:55:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:07,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157730949] [2021-05-21 20:55:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:07,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:07,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157730949] [2021-05-21 20:55:07,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157730949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:07,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127886956] [2021-05-21 20:55:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:07,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:55:07,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:55:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:07,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127886956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:07,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:07,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:07,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180476156] [2021-05-21 20:55:07,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:07,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:07,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:07,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:07,664 INFO L87 Difference]: Start difference. First operand 2208 states and 5497 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:08,402 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-05-21 20:55:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:55:08,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:08,405 INFO L225 Difference]: With dead ends: 2534 [2021-05-21 20:55:08,405 INFO L226 Difference]: Without dead ends: 2496 [2021-05-21 20:55:08,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 976.9ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:55:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-21 20:55:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2240. [2021-05-21 20:55:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-05-21 20:55:08,424 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-05-21 20:55:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:08,424 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-05-21 20:55:08,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-05-21 20:55:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:08,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:08,426 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:08,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:08,627 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 166 times [2021-05-21 20:55:08,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:08,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919276467] [2021-05-21 20:55:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:08,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:08,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919276467] [2021-05-21 20:55:08,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919276467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:08,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786545646] [2021-05-21 20:55:08,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:08,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:55:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786545646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:09,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:09,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856776134] [2021-05-21 20:55:09,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:09,220 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:09,838 INFO L93 Difference]: Finished difference Result 2470 states and 6132 transitions. [2021-05-21 20:55:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:55:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:09,841 INFO L225 Difference]: With dead ends: 2470 [2021-05-21 20:55:09,841 INFO L226 Difference]: Without dead ends: 2440 [2021-05-21 20:55:09,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 939.6ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:55:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-05-21 20:55:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2248. [2021-05-21 20:55:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-05-21 20:55:09,860 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-05-21 20:55:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:09,860 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-05-21 20:55:09,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-05-21 20:55:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:09,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:09,862 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:10,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2452 [2021-05-21 20:55:10,063 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:10,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 167 times [2021-05-21 20:55:10,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:10,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332773625] [2021-05-21 20:55:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:10,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:10,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332773625] [2021-05-21 20:55:10,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332773625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:10,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242082170] [2021-05-21 20:55:10,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:10,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:55:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:10,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242082170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:10,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:10,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090995635] [2021-05-21 20:55:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:10,721 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:11,300 INFO L93 Difference]: Finished difference Result 2502 states and 6216 transitions. [2021-05-21 20:55:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:11,303 INFO L225 Difference]: With dead ends: 2502 [2021-05-21 20:55:11,303 INFO L226 Difference]: Without dead ends: 2472 [2021-05-21 20:55:11,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 961.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-05-21 20:55:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2224. [2021-05-21 20:55:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-05-21 20:55:11,322 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-05-21 20:55:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:11,322 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-05-21 20:55:11,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-05-21 20:55:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:11,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:11,324 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:11,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2466 [2021-05-21 20:55:11,524 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 168 times [2021-05-21 20:55:11,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:11,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573515902] [2021-05-21 20:55:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:11,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:11,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573515902] [2021-05-21 20:55:11,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573515902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:11,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735210002] [2021-05-21 20:55:11,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:11,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:55:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:12,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735210002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:12,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:12,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:12,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704231339] [2021-05-21 20:55:12,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:12,234 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:12,988 INFO L93 Difference]: Finished difference Result 2478 states and 6156 transitions. [2021-05-21 20:55:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:55:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:12,990 INFO L225 Difference]: With dead ends: 2478 [2021-05-21 20:55:12,990 INFO L226 Difference]: Without dead ends: 2456 [2021-05-21 20:55:12,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1168.4ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:55:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-05-21 20:55:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2232. [2021-05-21 20:55:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-05-21 20:55:13,010 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-05-21 20:55:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:13,010 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-05-21 20:55:13,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-05-21 20:55:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:13,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:13,012 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:13,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:13,212 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:13,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 169 times [2021-05-21 20:55:13,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:13,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346944432] [2021-05-21 20:55:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:13,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:13,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346944432] [2021-05-21 20:55:13,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346944432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:13,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896683320] [2021-05-21 20:55:13,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:13,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:13,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896683320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:13,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:13,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:13,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928297985] [2021-05-21 20:55:13,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:13,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:13,938 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:14,575 INFO L93 Difference]: Finished difference Result 2406 states and 5976 transitions. [2021-05-21 20:55:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:14,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:14,578 INFO L225 Difference]: With dead ends: 2406 [2021-05-21 20:55:14,578 INFO L226 Difference]: Without dead ends: 2384 [2021-05-21 20:55:14,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-05-21 20:55:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2224. [2021-05-21 20:55:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-05-21 20:55:14,596 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-05-21 20:55:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:14,596 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-05-21 20:55:14,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-05-21 20:55:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:14,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:14,598 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:14,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2506 [2021-05-21 20:55:14,798 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:14,799 INFO L82 PathProgramCache]: Analyzing trace with hash 617903418, now seen corresponding path program 170 times [2021-05-21 20:55:14,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:14,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365549116] [2021-05-21 20:55:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:14,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:14,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365549116] [2021-05-21 20:55:14,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365549116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:14,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051944306] [2021-05-21 20:55:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:15,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:15,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051944306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:15,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:15,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:15,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937577289] [2021-05-21 20:55:15,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:15,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:15,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:15,445 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:16,100 INFO L93 Difference]: Finished difference Result 2366 states and 5868 transitions. [2021-05-21 20:55:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:16,102 INFO L225 Difference]: With dead ends: 2366 [2021-05-21 20:55:16,102 INFO L226 Difference]: Without dead ends: 2328 [2021-05-21 20:55:16,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 908.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-21 20:55:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2232. [2021-05-21 20:55:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-05-21 20:55:16,122 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-05-21 20:55:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:16,122 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-05-21 20:55:16,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-05-21 20:55:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:16,124 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:16,124 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:16,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2524,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:16,324 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1638894150, now seen corresponding path program 171 times [2021-05-21 20:55:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:16,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982371442] [2021-05-21 20:55:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:16,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:16,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982371442] [2021-05-21 20:55:16,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982371442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:16,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030582058] [2021-05-21 20:55:16,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:16,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:55:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:16,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030582058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:16,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:16,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:16,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477438164] [2021-05-21 20:55:16,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:16,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:16,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:16,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:16,843 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:17,568 INFO L93 Difference]: Finished difference Result 2422 states and 6016 transitions. [2021-05-21 20:55:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:55:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:17,571 INFO L225 Difference]: With dead ends: 2422 [2021-05-21 20:55:17,571 INFO L226 Difference]: Without dead ends: 2392 [2021-05-21 20:55:17,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:55:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-05-21 20:55:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2232. [2021-05-21 20:55:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-05-21 20:55:17,589 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-05-21 20:55:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:17,589 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-05-21 20:55:17,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-05-21 20:55:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:17,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:17,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:17,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2546,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:17,791 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:17,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1657142282, now seen corresponding path program 172 times [2021-05-21 20:55:17,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:17,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390925388] [2021-05-21 20:55:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:17,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390925388] [2021-05-21 20:55:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390925388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076083410] [2021-05-21 20:55:17,973 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:17,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:55:17,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:17,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:17,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:18,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076083410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:18,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:18,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:18,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446431128] [2021-05-21 20:55:18,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:18,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:18,349 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:18,823 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-05-21 20:55:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:55:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:18,825 INFO L225 Difference]: With dead ends: 2430 [2021-05-21 20:55:18,825 INFO L226 Difference]: Without dead ends: 2400 [2021-05-21 20:55:18,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 765.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:55:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-05-21 20:55:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2240. [2021-05-21 20:55:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-05-21 20:55:18,842 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-05-21 20:55:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:18,842 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-05-21 20:55:18,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-05-21 20:55:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:18,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:18,844 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:19,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:19,045 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 173 times [2021-05-21 20:55:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151989705] [2021-05-21 20:55:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:19,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:19,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151989705] [2021-05-21 20:55:19,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151989705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157803458] [2021-05-21 20:55:19,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:19,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:55:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:55:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:19,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157803458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:19,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:19,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:19,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406939574] [2021-05-21 20:55:19,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:19,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:19,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:19,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:19,587 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:19,969 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-05-21 20:55:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:55:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:19,971 INFO L225 Difference]: With dead ends: 2334 [2021-05-21 20:55:19,971 INFO L226 Difference]: Without dead ends: 2304 [2021-05-21 20:55:19,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 673.8ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:55:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-05-21 20:55:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2240. [2021-05-21 20:55:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-05-21 20:55:19,988 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-05-21 20:55:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-05-21 20:55:19,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-05-21 20:55:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:19,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:19,990 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:20,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2577,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:20,190 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1198122614, now seen corresponding path program 174 times [2021-05-21 20:55:20,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:20,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800136822] [2021-05-21 20:55:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:20,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:20,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800136822] [2021-05-21 20:55:20,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800136822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:20,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715771806] [2021-05-21 20:55:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:20,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:55:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:20,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715771806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:20,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:20,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:20,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623440705] [2021-05-21 20:55:20,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:20,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:20,740 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:21,200 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-05-21 20:55:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:21,202 INFO L225 Difference]: With dead ends: 2334 [2021-05-21 20:55:21,202 INFO L226 Difference]: Without dead ends: 2304 [2021-05-21 20:55:21,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-05-21 20:55:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2248. [2021-05-21 20:55:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-05-21 20:55:21,219 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-05-21 20:55:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:21,219 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-05-21 20:55:21,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-05-21 20:55:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:21,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:21,221 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:21,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2585 [2021-05-21 20:55:21,422 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1997723914, now seen corresponding path program 175 times [2021-05-21 20:55:21,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:21,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920014045] [2021-05-21 20:55:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:21,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920014045] [2021-05-21 20:55:21,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920014045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611315999] [2021-05-21 20:55:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:21,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611315999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:21,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:21,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543845692] [2021-05-21 20:55:21,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:21,962 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:22,441 INFO L93 Difference]: Finished difference Result 2358 states and 5852 transitions. [2021-05-21 20:55:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:22,444 INFO L225 Difference]: With dead ends: 2358 [2021-05-21 20:55:22,444 INFO L226 Difference]: Without dead ends: 2328 [2021-05-21 20:55:22,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 765.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-21 20:55:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2240. [2021-05-21 20:55:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-05-21 20:55:22,461 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-05-21 20:55:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:22,461 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-05-21 20:55:22,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-05-21 20:55:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:22,463 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:22,463 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:22,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:22,664 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:22,664 INFO L82 PathProgramCache]: Analyzing trace with hash 142122878, now seen corresponding path program 176 times [2021-05-21 20:55:22,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:22,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310816277] [2021-05-21 20:55:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:22,942 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 15 [2021-05-21 20:55:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:23,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310816277] [2021-05-21 20:55:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310816277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291801721] [2021-05-21 20:55:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:23,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:23,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291801721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:23,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:23,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:23,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887221577] [2021-05-21 20:55:23,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:23,454 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:23,961 INFO L93 Difference]: Finished difference Result 2350 states and 5836 transitions. [2021-05-21 20:55:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:23,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:23,963 INFO L225 Difference]: With dead ends: 2350 [2021-05-21 20:55:23,963 INFO L226 Difference]: Without dead ends: 2328 [2021-05-21 20:55:23,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 639.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-21 20:55:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2256. [2021-05-21 20:55:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.4909090909090907) internal successors, (5617), 2255 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 5617 transitions. [2021-05-21 20:55:23,982 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 5617 transitions. Word has length 32 [2021-05-21 20:55:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:23,982 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 5617 transitions. [2021-05-21 20:55:23,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 5617 transitions. [2021-05-21 20:55:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:23,984 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:23,984 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:24,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2627 [2021-05-21 20:55:24,184 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -383904958, now seen corresponding path program 177 times [2021-05-21 20:55:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:24,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106885268] [2021-05-21 20:55:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:24,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:24,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106885268] [2021-05-21 20:55:24,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106885268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:24,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960548285] [2021-05-21 20:55:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:24,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:55:24,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:24,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960548285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:24,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:24,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:24,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127438158] [2021-05-21 20:55:24,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:24,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:24,699 INFO L87 Difference]: Start difference. First operand 2256 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:25,268 INFO L93 Difference]: Finished difference Result 2398 states and 5952 transitions. [2021-05-21 20:55:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:25,270 INFO L225 Difference]: With dead ends: 2398 [2021-05-21 20:55:25,270 INFO L226 Difference]: Without dead ends: 2368 [2021-05-21 20:55:25,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-05-21 20:55:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2272. [2021-05-21 20:55:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.4909731395860852) internal successors, (5657), 2271 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 5657 transitions. [2021-05-21 20:55:25,288 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 5657 transitions. Word has length 32 [2021-05-21 20:55:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:25,288 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 5657 transitions. [2021-05-21 20:55:25,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 5657 transitions. [2021-05-21 20:55:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:25,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:25,290 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:25,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2641 [2021-05-21 20:55:25,490 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1534555074, now seen corresponding path program 178 times [2021-05-21 20:55:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:25,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220380974] [2021-05-21 20:55:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:25,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:25,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220380974] [2021-05-21 20:55:25,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220380974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:25,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425935450] [2021-05-21 20:55:25,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:25,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:55:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:26,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425935450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:26,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:26,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:26,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056473461] [2021-05-21 20:55:26,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:26,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:26,141 INFO L87 Difference]: Start difference. First operand 2272 states and 5657 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:26,821 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-05-21 20:55:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:55:26,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:26,824 INFO L225 Difference]: With dead ends: 2502 [2021-05-21 20:55:26,824 INFO L226 Difference]: Without dead ends: 2472 [2021-05-21 20:55:26,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1038.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:55:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-05-21 20:55:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2280. [2021-05-21 20:55:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-05-21 20:55:26,843 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-05-21 20:55:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:26,843 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-05-21 20:55:26,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-05-21 20:55:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:26,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:26,844 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:27,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2657,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:27,045 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash -196214658, now seen corresponding path program 179 times [2021-05-21 20:55:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:27,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193340205] [2021-05-21 20:55:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:27,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:27,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193340205] [2021-05-21 20:55:27,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193340205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:27,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535543389] [2021-05-21 20:55:27,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:27,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:55:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:55:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535543389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:27,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:27,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:27,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214605105] [2021-05-21 20:55:27,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:27,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:27,626 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:28,132 INFO L93 Difference]: Finished difference Result 2438 states and 6056 transitions. [2021-05-21 20:55:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:55:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:28,134 INFO L225 Difference]: With dead ends: 2438 [2021-05-21 20:55:28,134 INFO L226 Difference]: Without dead ends: 2416 [2021-05-21 20:55:28,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:55:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-05-21 20:55:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2280. [2021-05-21 20:55:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-05-21 20:55:28,154 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-05-21 20:55:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:28,154 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-05-21 20:55:28,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-05-21 20:55:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:28,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:28,156 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:28,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-05-21 20:55:28,369 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash 872989310, now seen corresponding path program 180 times [2021-05-21 20:55:28,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:28,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185374596] [2021-05-21 20:55:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:28,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:28,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185374596] [2021-05-21 20:55:28,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185374596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:28,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239927780] [2021-05-21 20:55:28,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:28,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:55:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:28,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239927780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:28,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:28,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:28,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522925217] [2021-05-21 20:55:28,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:28,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:28,926 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:29,496 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-05-21 20:55:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:29,499 INFO L225 Difference]: With dead ends: 2534 [2021-05-21 20:55:29,499 INFO L226 Difference]: Without dead ends: 2496 [2021-05-21 20:55:29,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-21 20:55:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2304. [2021-05-21 20:55:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 2.491098567086409) internal successors, (5737), 2303 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 5737 transitions. [2021-05-21 20:55:29,517 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 5737 transitions. Word has length 32 [2021-05-21 20:55:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:29,517 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 5737 transitions. [2021-05-21 20:55:29,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 5737 transitions. [2021-05-21 20:55:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:29,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:29,519 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:29,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2688,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:29,729 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1060679610, now seen corresponding path program 181 times [2021-05-21 20:55:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:29,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191986319] [2021-05-21 20:55:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:29,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191986319] [2021-05-21 20:55:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191986319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529795795] [2021-05-21 20:55:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:30,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529795795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:30,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:30,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:30,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189114290] [2021-05-21 20:55:30,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:30,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:30,312 INFO L87 Difference]: Start difference. First operand 2304 states and 5737 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:30,928 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-05-21 20:55:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:55:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:30,931 INFO L225 Difference]: With dead ends: 2598 [2021-05-21 20:55:30,931 INFO L226 Difference]: Without dead ends: 2560 [2021-05-21 20:55:30,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:55:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-05-21 20:55:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2296. [2021-05-21 20:55:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.491067538126362) internal successors, (5717), 2295 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5717 transitions. [2021-05-21 20:55:30,951 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5717 transitions. Word has length 32 [2021-05-21 20:55:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:30,951 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 5717 transitions. [2021-05-21 20:55:30,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5717 transitions. [2021-05-21 20:55:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:30,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:30,953 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:31,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2705 [2021-05-21 20:55:31,154 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash 534651774, now seen corresponding path program 182 times [2021-05-21 20:55:31,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:31,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882156735] [2021-05-21 20:55:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:31,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:31,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882156735] [2021-05-21 20:55:31,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882156735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:31,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977127152] [2021-05-21 20:55:31,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:31,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:31,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:31,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:55:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:31,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977127152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:31,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:31,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:31,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047041021] [2021-05-21 20:55:31,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:31,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:31,627 INFO L87 Difference]: Start difference. First operand 2296 states and 5717 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:32,024 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-05-21 20:55:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:32,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:32,026 INFO L225 Difference]: With dead ends: 2446 [2021-05-21 20:55:32,026 INFO L226 Difference]: Without dead ends: 2408 [2021-05-21 20:55:32,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-05-21 20:55:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2312. [2021-05-21 20:55:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.491129381220251) internal successors, (5757), 2311 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5757 transitions. [2021-05-21 20:55:32,043 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5757 transitions. Word has length 32 [2021-05-21 20:55:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:32,043 INFO L482 AbstractCegarLoop]: Abstraction has 2312 states and 5757 transitions. [2021-05-21 20:55:32,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5757 transitions. [2021-05-21 20:55:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:32,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:32,045 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:32,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:32,246 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 722342074, now seen corresponding path program 183 times [2021-05-21 20:55:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:32,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243044356] [2021-05-21 20:55:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:32,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:32,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243044356] [2021-05-21 20:55:32,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243044356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:32,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483815104] [2021-05-21 20:55:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:32,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:55:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:32,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483815104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:32,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:32,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545843825] [2021-05-21 20:55:32,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:32,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:32,809 INFO L87 Difference]: Start difference. First operand 2312 states and 5757 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:33,320 INFO L93 Difference]: Finished difference Result 2558 states and 6344 transitions. [2021-05-21 20:55:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:33,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:33,323 INFO L225 Difference]: With dead ends: 2558 [2021-05-21 20:55:33,323 INFO L226 Difference]: Without dead ends: 2512 [2021-05-21 20:55:33,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-05-21 20:55:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2320. [2021-05-21 20:55:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.491159982751186) internal successors, (5777), 2319 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 5777 transitions. [2021-05-21 20:55:33,341 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 5777 transitions. Word has length 32 [2021-05-21 20:55:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:33,341 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 5777 transitions. [2021-05-21 20:55:33,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 5777 transitions. [2021-05-21 20:55:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:33,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:33,343 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:33,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2744,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:33,543 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash -742734722, now seen corresponding path program 184 times [2021-05-21 20:55:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:33,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785580787] [2021-05-21 20:55:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:33,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785580787] [2021-05-21 20:55:33,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785580787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:33,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234754315] [2021-05-21 20:55:33,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:33,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:55:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:34,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234754315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:34,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:34,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:34,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181192551] [2021-05-21 20:55:34,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:34,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:34,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:34,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:34,064 INFO L87 Difference]: Start difference. First operand 2320 states and 5777 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:34,912 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-05-21 20:55:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:55:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:34,914 INFO L225 Difference]: With dead ends: 2502 [2021-05-21 20:55:34,914 INFO L226 Difference]: Without dead ends: 2472 [2021-05-21 20:55:34,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 979.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:55:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-05-21 20:55:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2328. [2021-05-21 20:55:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4911903738719383) internal successors, (5797), 2327 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5797 transitions. [2021-05-21 20:55:34,933 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5797 transitions. Word has length 32 [2021-05-21 20:55:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:34,933 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 5797 transitions. [2021-05-21 20:55:34,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5797 transitions. [2021-05-21 20:55:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:34,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:34,935 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:35,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2769 [2021-05-21 20:55:35,136 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:35,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1888120646, now seen corresponding path program 185 times [2021-05-21 20:55:35,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:35,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476905207] [2021-05-21 20:55:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:35,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476905207] [2021-05-21 20:55:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476905207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327518480] [2021-05-21 20:55:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:35,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:55:35,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:35,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327518480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:35,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:35,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271922633] [2021-05-21 20:55:35,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:35,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:35,863 INFO L87 Difference]: Start difference. First operand 2328 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:36,660 INFO L93 Difference]: Finished difference Result 2686 states and 6664 transitions. [2021-05-21 20:55:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:55:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:36,663 INFO L225 Difference]: With dead ends: 2686 [2021-05-21 20:55:36,663 INFO L226 Difference]: Without dead ends: 2640 [2021-05-21 20:55:36,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1176.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:55:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-05-21 20:55:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2336. [2021-05-21 20:55:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.491220556745182) internal successors, (5817), 2335 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5817 transitions. [2021-05-21 20:55:36,687 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5817 transitions. Word has length 32 [2021-05-21 20:55:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:36,687 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 5817 transitions. [2021-05-21 20:55:36,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5817 transitions. [2021-05-21 20:55:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:36,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:36,689 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:36,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2784 [2021-05-21 20:55:36,893 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1880818814, now seen corresponding path program 186 times [2021-05-21 20:55:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:36,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875020698] [2021-05-21 20:55:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:37,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:37,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875020698] [2021-05-21 20:55:37,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875020698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:37,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115367737] [2021-05-21 20:55:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:37,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:55:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:37,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115367737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:37,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:37,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:37,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696306520] [2021-05-21 20:55:37,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:37,501 INFO L87 Difference]: Start difference. First operand 2336 states and 5817 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:37,994 INFO L93 Difference]: Finished difference Result 2526 states and 6268 transitions. [2021-05-21 20:55:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:55:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:37,996 INFO L225 Difference]: With dead ends: 2526 [2021-05-21 20:55:37,996 INFO L226 Difference]: Without dead ends: 2488 [2021-05-21 20:55:37,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:55:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-05-21 20:55:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2352. [2021-05-21 20:55:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4912803062526585) internal successors, (5857), 2351 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5857 transitions. [2021-05-21 20:55:38,030 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5857 transitions. Word has length 32 [2021-05-21 20:55:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:38,031 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 5857 transitions. [2021-05-21 20:55:38,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5857 transitions. [2021-05-21 20:55:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:38,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:38,033 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:38,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2802 [2021-05-21 20:55:38,233 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2068509114, now seen corresponding path program 187 times [2021-05-21 20:55:38,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:38,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412659487] [2021-05-21 20:55:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:38,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412659487] [2021-05-21 20:55:38,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412659487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108093509] [2021-05-21 20:55:38,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:38,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108093509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:38,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:38,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:38,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471965351] [2021-05-21 20:55:38,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:38,921 INFO L87 Difference]: Start difference. First operand 2352 states and 5857 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:39,506 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-05-21 20:55:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:39,508 INFO L225 Difference]: With dead ends: 2718 [2021-05-21 20:55:39,508 INFO L226 Difference]: Without dead ends: 2672 [2021-05-21 20:55:39,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1007.0ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-21 20:55:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-05-21 20:55:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-05-21 20:55:39,528 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-05-21 20:55:39,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:39,528 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-05-21 20:55:39,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-05-21 20:55:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:39,529 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:39,529 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:39,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:39,730 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash 603432318, now seen corresponding path program 188 times [2021-05-21 20:55:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:39,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726796014] [2021-05-21 20:55:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:39,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:39,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726796014] [2021-05-21 20:55:39,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726796014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:39,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584668279] [2021-05-21 20:55:39,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:39,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:40,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584668279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:40,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:40,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245829620] [2021-05-21 20:55:40,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:40,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:40,309 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:40,956 INFO L93 Difference]: Finished difference Result 2702 states and 6712 transitions. [2021-05-21 20:55:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:55:40,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:40,959 INFO L225 Difference]: With dead ends: 2702 [2021-05-21 20:55:40,959 INFO L226 Difference]: Without dead ends: 2672 [2021-05-21 20:55:40,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:55:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-21 20:55:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-05-21 20:55:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-05-21 20:55:40,978 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-05-21 20:55:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:40,979 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-05-21 20:55:40,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-05-21 20:55:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:40,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:40,980 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:41,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2843 [2021-05-21 20:55:41,181 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash -951315782, now seen corresponding path program 189 times [2021-05-21 20:55:41,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:41,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728906467] [2021-05-21 20:55:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:41,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:41,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728906467] [2021-05-21 20:55:41,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728906467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:41,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376427252] [2021-05-21 20:55:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:41,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:55:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:41,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376427252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:41,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:41,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:41,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432677046] [2021-05-21 20:55:41,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:41,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:41,882 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:42,470 INFO L93 Difference]: Finished difference Result 2510 states and 6232 transitions. [2021-05-21 20:55:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:42,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:42,472 INFO L225 Difference]: With dead ends: 2510 [2021-05-21 20:55:42,472 INFO L226 Difference]: Without dead ends: 2480 [2021-05-21 20:55:42,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1031.0ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-05-21 20:55:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2392. [2021-05-21 20:55:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-05-21 20:55:42,491 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-05-21 20:55:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:42,491 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-05-21 20:55:42,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-05-21 20:55:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:42,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:42,493 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:42,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2862 [2021-05-21 20:55:42,693 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1878574718, now seen corresponding path program 190 times [2021-05-21 20:55:42,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:42,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666233173] [2021-05-21 20:55:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:42,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666233173] [2021-05-21 20:55:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666233173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591006474] [2021-05-21 20:55:42,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:42,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:55:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:42,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:43,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591006474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:43,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:43,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104030852] [2021-05-21 20:55:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:43,327 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:44,116 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-05-21 20:55:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:55:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:44,118 INFO L225 Difference]: With dead ends: 2622 [2021-05-21 20:55:44,119 INFO L226 Difference]: Without dead ends: 2592 [2021-05-21 20:55:44,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1115.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:55:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-05-21 20:55:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2392. [2021-05-21 20:55:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-05-21 20:55:44,140 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-05-21 20:55:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:44,140 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-05-21 20:55:44,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-05-21 20:55:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:44,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:44,142 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:44,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2882,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:44,342 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:44,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1157254214, now seen corresponding path program 191 times [2021-05-21 20:55:44,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:44,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030172282] [2021-05-21 20:55:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:44,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:44,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030172282] [2021-05-21 20:55:44,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030172282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:44,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952389053] [2021-05-21 20:55:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:44,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:55:44,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:45,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952389053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:45,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:45,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:45,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894125055] [2021-05-21 20:55:45,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:45,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:45,006 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:45,717 INFO L93 Difference]: Finished difference Result 2710 states and 6692 transitions. [2021-05-21 20:55:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:55:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:45,720 INFO L225 Difference]: With dead ends: 2710 [2021-05-21 20:55:45,720 INFO L226 Difference]: Without dead ends: 2680 [2021-05-21 20:55:45,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1075.8ms TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:55:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-21 20:55:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2408. [2021-05-21 20:55:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.493144993768176) internal successors, (6001), 2407 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 6001 transitions. [2021-05-21 20:55:45,739 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 6001 transitions. Word has length 32 [2021-05-21 20:55:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:45,739 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 6001 transitions. [2021-05-21 20:55:45,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 6001 transitions. [2021-05-21 20:55:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:45,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:45,741 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:45,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2902 [2021-05-21 20:55:45,942 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash -969563914, now seen corresponding path program 192 times [2021-05-21 20:55:45,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:45,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936750418] [2021-05-21 20:55:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:46,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936750418] [2021-05-21 20:55:46,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936750418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448011925] [2021-05-21 20:55:46,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:46,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:55:46,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:46,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448011925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:46,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:46,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:46,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003223249] [2021-05-21 20:55:46,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:46,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:46,508 INFO L87 Difference]: Start difference. First operand 2408 states and 6001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:47,056 INFO L93 Difference]: Finished difference Result 2614 states and 6496 transitions. [2021-05-21 20:55:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:55:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:47,059 INFO L225 Difference]: With dead ends: 2614 [2021-05-21 20:55:47,059 INFO L226 Difference]: Without dead ends: 2584 [2021-05-21 20:55:47,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:55:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-05-21 20:55:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2400. [2021-05-21 20:55:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4931221342225927) internal successors, (5981), 2399 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5981 transitions. [2021-05-21 20:55:47,079 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5981 transitions. Word has length 32 [2021-05-21 20:55:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:47,079 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5981 transitions. [2021-05-21 20:55:47,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5981 transitions. [2021-05-21 20:55:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:47,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:47,081 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:47,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2925,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:47,281 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 422868282, now seen corresponding path program 193 times [2021-05-21 20:55:47,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:47,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016221322] [2021-05-21 20:55:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:47,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:47,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016221322] [2021-05-21 20:55:47,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016221322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:47,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596773253] [2021-05-21 20:55:47,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:47,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596773253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:47,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:47,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:47,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616584123] [2021-05-21 20:55:47,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:47,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:47,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:47,939 INFO L87 Difference]: Start difference. First operand 2400 states and 5981 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:48,647 INFO L93 Difference]: Finished difference Result 2670 states and 6632 transitions. [2021-05-21 20:55:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:55:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:48,649 INFO L225 Difference]: With dead ends: 2670 [2021-05-21 20:55:48,649 INFO L226 Difference]: Without dead ends: 2632 [2021-05-21 20:55:48,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1086.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:55:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-05-21 20:55:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2400. [2021-05-21 20:55:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-05-21 20:55:48,668 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-05-21 20:55:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:48,668 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-05-21 20:55:48,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-05-21 20:55:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:48,670 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:48,670 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:48,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2945 [2021-05-21 20:55:48,870 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1307901450, now seen corresponding path program 194 times [2021-05-21 20:55:48,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:48,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443580235] [2021-05-21 20:55:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:49,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:49,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443580235] [2021-05-21 20:55:49,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443580235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:49,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689838286] [2021-05-21 20:55:49,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:49,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:49,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689838286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:49,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:49,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:49,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404169265] [2021-05-21 20:55:49,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:49,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:49,526 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:50,171 INFO L93 Difference]: Finished difference Result 2566 states and 6376 transitions. [2021-05-21 20:55:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:55:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:50,173 INFO L225 Difference]: With dead ends: 2566 [2021-05-21 20:55:50,173 INFO L226 Difference]: Without dead ends: 2544 [2021-05-21 20:55:50,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 977.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:55:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-05-21 20:55:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2392. [2021-05-21 20:55:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-05-21 20:55:50,191 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-05-21 20:55:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:50,191 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-05-21 20:55:50,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-05-21 20:55:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:50,193 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:50,193 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:50,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2969,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:50,393 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1176193470, now seen corresponding path program 195 times [2021-05-21 20:55:50,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:50,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881804228] [2021-05-21 20:55:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:50,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:50,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881804228] [2021-05-21 20:55:50,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881804228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:50,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050725965] [2021-05-21 20:55:50,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:50,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:55:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050725965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:50,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:50,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:50,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326867008] [2021-05-21 20:55:50,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:50,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:50,885 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:51,743 INFO L93 Difference]: Finished difference Result 2526 states and 6272 transitions. [2021-05-21 20:55:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:55:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:51,746 INFO L225 Difference]: With dead ends: 2526 [2021-05-21 20:55:51,746 INFO L226 Difference]: Without dead ends: 2496 [2021-05-21 20:55:51,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1081.5ms TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:55:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-21 20:55:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2400. [2021-05-21 20:55:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-05-21 20:55:51,764 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-05-21 20:55:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:51,764 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-05-21 20:55:51,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-05-21 20:55:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:51,766 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:51,766 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:51,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2989,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:51,967 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:51,967 INFO L82 PathProgramCache]: Analyzing trace with hash -988503170, now seen corresponding path program 196 times [2021-05-21 20:55:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:51,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164123098] [2021-05-21 20:55:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:52,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:52,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164123098] [2021-05-21 20:55:52,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164123098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:52,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124393355] [2021-05-21 20:55:52,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:52,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:55:52,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:52,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:52,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124393355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:52,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:52,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16369115] [2021-05-21 20:55:52,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:52,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:52,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:52,648 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:53,342 INFO L93 Difference]: Finished difference Result 2534 states and 6292 transitions. [2021-05-21 20:55:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:55:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:53,345 INFO L225 Difference]: With dead ends: 2534 [2021-05-21 20:55:53,345 INFO L226 Difference]: Without dead ends: 2504 [2021-05-21 20:55:53,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1056.8ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:55:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-05-21 20:55:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2392. [2021-05-21 20:55:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-05-21 20:55:53,365 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-05-21 20:55:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:53,365 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-05-21 20:55:53,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-05-21 20:55:53,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:53,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:53,367 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:53,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:53,567 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1534490562, now seen corresponding path program 197 times [2021-05-21 20:55:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:53,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419008864] [2021-05-21 20:55:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:53,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:53,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419008864] [2021-05-21 20:55:53,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419008864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:53,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075896460] [2021-05-21 20:55:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:53,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:55:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:54,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075896460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:54,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:54,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987158726] [2021-05-21 20:55:54,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:54,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:54,191 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:54,962 INFO L93 Difference]: Finished difference Result 2646 states and 6572 transitions. [2021-05-21 20:55:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:55:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:54,965 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 20:55:54,965 INFO L226 Difference]: Without dead ends: 2616 [2021-05-21 20:55:54,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:55:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-05-21 20:55:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2408. [2021-05-21 20:55:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4914831740756127) internal successors, (5997), 2407 states have internal predecessors, (5997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5997 transitions. [2021-05-21 20:55:54,984 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5997 transitions. Word has length 32 [2021-05-21 20:55:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:54,984 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 5997 transitions. [2021-05-21 20:55:54,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5997 transitions. [2021-05-21 20:55:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:54,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:54,986 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:55,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3019,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:55,187 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1532779138, now seen corresponding path program 198 times [2021-05-21 20:55:55,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:55,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724565399] [2021-05-21 20:55:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:55,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724565399] [2021-05-21 20:55:55,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724565399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:55,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419869151] [2021-05-21 20:55:55,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:55,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:55:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:55,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:55,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419869151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:55,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:55,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:55,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224403571] [2021-05-21 20:55:55,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:55,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:55,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:55,707 INFO L87 Difference]: Start difference. First operand 2408 states and 5997 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:56,125 INFO L93 Difference]: Finished difference Result 2590 states and 6428 transitions. [2021-05-21 20:55:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:55:56,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:56,127 INFO L225 Difference]: With dead ends: 2590 [2021-05-21 20:55:56,127 INFO L226 Difference]: Without dead ends: 2552 [2021-05-21 20:55:56,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:55:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-05-21 20:55:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2416. [2021-05-21 20:55:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-05-21 20:55:56,145 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-05-21 20:55:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:56,145 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-05-21 20:55:56,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-05-21 20:55:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:56,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:56,147 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:56,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3039 [2021-05-21 20:55:56,348 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:56,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1345088838, now seen corresponding path program 199 times [2021-05-21 20:55:56,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:56,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289752624] [2021-05-21 20:55:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:56,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289752624] [2021-05-21 20:55:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289752624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413287547] [2021-05-21 20:55:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:56,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:56,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:57,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413287547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:57,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:57,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:57,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945987243] [2021-05-21 20:55:57,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:57,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:57,011 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:57,665 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-05-21 20:55:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:55:57,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:57,668 INFO L225 Difference]: With dead ends: 2774 [2021-05-21 20:55:57,668 INFO L226 Difference]: Without dead ends: 2736 [2021-05-21 20:55:57,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1025.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:55:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-05-21 20:55:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2416. [2021-05-21 20:55:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-05-21 20:55:57,688 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-05-21 20:55:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:57,688 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-05-21 20:55:57,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-05-21 20:55:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:57,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:57,690 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:57,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3053 [2021-05-21 20:55:57,891 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash -69946438, now seen corresponding path program 200 times [2021-05-21 20:55:57,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:57,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419877055] [2021-05-21 20:55:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:58,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:58,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419877055] [2021-05-21 20:55:58,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419877055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:58,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849610281] [2021-05-21 20:55:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:58,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:55:58,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:55:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:58,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:55:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:58,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849610281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:58,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:55:58,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:55:58,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342042546] [2021-05-21 20:55:58,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:55:58,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:55:58,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:55:58,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:55:58,564 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:55:59,327 INFO L93 Difference]: Finished difference Result 2622 states and 6516 transitions. [2021-05-21 20:55:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:55:59,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:55:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:55:59,330 INFO L225 Difference]: With dead ends: 2622 [2021-05-21 20:55:59,330 INFO L226 Difference]: Without dead ends: 2600 [2021-05-21 20:55:59,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1153.0ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:55:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-05-21 20:55:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2440. [2021-05-21 20:55:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4915949159491593) internal successors, (6077), 2439 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6077 transitions. [2021-05-21 20:55:59,349 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6077 transitions. Word has length 32 [2021-05-21 20:55:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:55:59,349 INFO L482 AbstractCegarLoop]: Abstraction has 2440 states and 6077 transitions. [2021-05-21 20:55:59,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:55:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6077 transitions. [2021-05-21 20:55:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:55:59,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:55:59,350 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:55:59,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:59,551 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:55:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:55:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1535023234, now seen corresponding path program 201 times [2021-05-21 20:55:59,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:55:59,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204520936] [2021-05-21 20:55:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:55:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:55:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:55:59,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:55:59,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204520936] [2021-05-21 20:55:59,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204520936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:55:59,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4859953] [2021-05-21 20:55:59,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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) [2021-05-21 20:55:59,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:55:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:55:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:55:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:00,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4859953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:00,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:00,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505321614] [2021-05-21 20:56:00,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:00,166 INFO L87 Difference]: Start difference. First operand 2440 states and 6077 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:00,980 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-05-21 20:56:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:56:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:00,983 INFO L225 Difference]: With dead ends: 2718 [2021-05-21 20:56:00,983 INFO L226 Difference]: Without dead ends: 2688 [2021-05-21 20:56:00,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1111.1ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:56:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-05-21 20:56:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2448. [2021-05-21 20:56:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-05-21 20:56:01,003 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-05-21 20:56:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:01,003 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-05-21 20:56:01,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-05-21 20:56:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:01,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:01,004 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:01,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3091 [2021-05-21 20:56:01,205 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash -275884870, now seen corresponding path program 202 times [2021-05-21 20:56:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:01,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511072743] [2021-05-21 20:56:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:01,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511072743] [2021-05-21 20:56:01,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511072743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152974798] [2021-05-21 20:56:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:01,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:56:01,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:01,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152974798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:01,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:01,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802112159] [2021-05-21 20:56:01,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:01,817 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:02,441 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-05-21 20:56:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:56:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:02,444 INFO L225 Difference]: With dead ends: 2742 [2021-05-21 20:56:02,444 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 20:56:02,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 950.3ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:56:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 20:56:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2456. [2021-05-21 20:56:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-05-21 20:56:02,464 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-05-21 20:56:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:02,464 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-05-21 20:56:02,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-05-21 20:56:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:02,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:02,466 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:02,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:02,666 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:02,667 INFO L82 PathProgramCache]: Analyzing trace with hash -88194570, now seen corresponding path program 203 times [2021-05-21 20:56:02,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:02,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464500902] [2021-05-21 20:56:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:02,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464500902] [2021-05-21 20:56:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464500902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060164311] [2021-05-21 20:56:02,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:02,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:56:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:56:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:03,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060164311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:03,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:03,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200716635] [2021-05-21 20:56:03,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:03,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:03,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:03,173 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:03,611 INFO L93 Difference]: Finished difference Result 2710 states and 6732 transitions. [2021-05-21 20:56:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:56:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:03,614 INFO L225 Difference]: With dead ends: 2710 [2021-05-21 20:56:03,614 INFO L226 Difference]: Without dead ends: 2680 [2021-05-21 20:56:03,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:56:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-21 20:56:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2424. [2021-05-21 20:56:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-05-21 20:56:03,636 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-05-21 20:56:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:03,636 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-05-21 20:56:03,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-05-21 20:56:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:03,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:03,638 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:03,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:03,838 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1304237626, now seen corresponding path program 204 times [2021-05-21 20:56:03,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:03,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056918487] [2021-05-21 20:56:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:04,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:04,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056918487] [2021-05-21 20:56:04,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056918487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:04,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135376415] [2021-05-21 20:56:04,020 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:04,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:56:04,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:04,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135376415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:04,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:04,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:04,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937221721] [2021-05-21 20:56:04,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:04,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:04,488 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:05,258 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-05-21 20:56:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:56:05,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:05,261 INFO L225 Difference]: With dead ends: 2798 [2021-05-21 20:56:05,261 INFO L226 Difference]: Without dead ends: 2760 [2021-05-21 20:56:05,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1129.6ms TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:56:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-05-21 20:56:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2432. [2021-05-21 20:56:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.4915672562731386) internal successors, (6057), 2431 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6057 transitions. [2021-05-21 20:56:05,284 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6057 transitions. Word has length 32 [2021-05-21 20:56:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:05,284 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 6057 transitions. [2021-05-21 20:56:05,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6057 transitions. [2021-05-21 20:56:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:05,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:05,286 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:05,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3138,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:05,487 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash -426532106, now seen corresponding path program 205 times [2021-05-21 20:56:05,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:05,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127947086] [2021-05-21 20:56:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:05,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127947086] [2021-05-21 20:56:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127947086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109094310] [2021-05-21 20:56:05,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:06,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109094310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:06,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:06,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253472508] [2021-05-21 20:56:06,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:06,181 INFO L87 Difference]: Start difference. First operand 2432 states and 6057 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:06,925 INFO L93 Difference]: Finished difference Result 2662 states and 6616 transitions. [2021-05-21 20:56:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:56:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:06,927 INFO L225 Difference]: With dead ends: 2662 [2021-05-21 20:56:06,927 INFO L226 Difference]: Without dead ends: 2640 [2021-05-21 20:56:06,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1104.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:56:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-05-21 20:56:06,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2424. [2021-05-21 20:56:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-05-21 20:56:06,949 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-05-21 20:56:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:06,949 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-05-21 20:56:06,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-05-21 20:56:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:06,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:06,950 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:07,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:07,151 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1644562630, now seen corresponding path program 206 times [2021-05-21 20:56:07,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:07,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164661309] [2021-05-21 20:56:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:07,545 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 17 [2021-05-21 20:56:07,784 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-05-21 20:56:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:07,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164661309] [2021-05-21 20:56:07,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164661309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054415104] [2021-05-21 20:56:07,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:07,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:56:07,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:08,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054415104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:08,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:08,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:08,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569172550] [2021-05-21 20:56:08,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:08,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:08,271 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:08,937 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-05-21 20:56:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:56:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:08,940 INFO L225 Difference]: With dead ends: 2742 [2021-05-21 20:56:08,940 INFO L226 Difference]: Without dead ends: 2704 [2021-05-21 20:56:08,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 954.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:56:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-05-21 20:56:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2424. [2021-05-21 20:56:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-05-21 20:56:08,962 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-05-21 20:56:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:08,962 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-05-21 20:56:08,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-05-21 20:56:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:08,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:08,964 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:09,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:09,181 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -369420230, now seen corresponding path program 207 times [2021-05-21 20:56:09,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:09,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025700983] [2021-05-21 20:56:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:09,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:09,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025700983] [2021-05-21 20:56:09,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025700983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:09,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999298350] [2021-05-21 20:56:09,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:09,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:56:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:09,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999298350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:09,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:09,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198451828] [2021-05-21 20:56:09,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:09,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:09,704 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:10,270 INFO L93 Difference]: Finished difference Result 2678 states and 6644 transitions. [2021-05-21 20:56:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:56:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:10,272 INFO L225 Difference]: With dead ends: 2678 [2021-05-21 20:56:10,272 INFO L226 Difference]: Without dead ends: 2632 [2021-05-21 20:56:10,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:56:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-05-21 20:56:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2456. [2021-05-21 20:56:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-05-21 20:56:10,293 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-05-21 20:56:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:10,293 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-05-21 20:56:10,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-05-21 20:56:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:10,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:10,295 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:10,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-05-21 20:56:10,495 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:10,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2100189962, now seen corresponding path program 208 times [2021-05-21 20:56:10,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:10,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435723071] [2021-05-21 20:56:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:10,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:10,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435723071] [2021-05-21 20:56:10,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435723071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:10,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876489367] [2021-05-21 20:56:10,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:10,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:56:10,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:10,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:11,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876489367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:11,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:11,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:11,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099335561] [2021-05-21 20:56:11,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:11,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:11,029 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:11,536 INFO L93 Difference]: Finished difference Result 2646 states and 6576 transitions. [2021-05-21 20:56:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:11,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:11,538 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 20:56:11,538 INFO L226 Difference]: Without dead ends: 2624 [2021-05-21 20:56:11,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-05-21 20:56:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2448. [2021-05-21 20:56:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-05-21 20:56:11,558 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-05-21 20:56:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:11,558 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-05-21 20:56:11,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-05-21 20:56:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:11,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:11,560 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-05-21 20:56:11,760 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1988838902, now seen corresponding path program 209 times [2021-05-21 20:56:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329677619] [2021-05-21 20:56:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:11,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329677619] [2021-05-21 20:56:11,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329677619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142091656] [2021-05-21 20:56:11,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:11,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:56:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:11,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:12,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142091656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:12,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:12,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:12,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405351154] [2021-05-21 20:56:12,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:12,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:12,238 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:12,715 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-05-21 20:56:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:12,717 INFO L225 Difference]: With dead ends: 2702 [2021-05-21 20:56:12,717 INFO L226 Difference]: Without dead ends: 2664 [2021-05-21 20:56:12,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 673.0ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-05-21 20:56:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2456. [2021-05-21 20:56:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-05-21 20:56:12,737 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-05-21 20:56:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:12,737 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-05-21 20:56:12,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-05-21 20:56:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:12,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:12,739 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:12,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3222,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:12,939 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2118438094, now seen corresponding path program 210 times [2021-05-21 20:56:12,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:12,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651806845] [2021-05-21 20:56:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:13,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:13,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651806845] [2021-05-21 20:56:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651806845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:13,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521799599] [2021-05-21 20:56:13,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:13,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:56:13,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:13,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521799599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:13,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:13,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:13,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438657065] [2021-05-21 20:56:13,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:13,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:13,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:13,592 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:14,203 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-05-21 20:56:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:14,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:14,205 INFO L225 Difference]: With dead ends: 2718 [2021-05-21 20:56:14,205 INFO L226 Difference]: Without dead ends: 2672 [2021-05-21 20:56:14,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 973.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-21 20:56:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2448. [2021-05-21 20:56:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-05-21 20:56:14,225 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-05-21 20:56:14,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:14,225 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-05-21 20:56:14,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-05-21 20:56:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:14,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:14,227 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:14,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-05-21 20:56:14,427 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash 373114870, now seen corresponding path program 211 times [2021-05-21 20:56:14,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:14,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225701893] [2021-05-21 20:56:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:14,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:14,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225701893] [2021-05-21 20:56:14,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225701893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:14,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749623170] [2021-05-21 20:56:14,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:14,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749623170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:14,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:14,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:14,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504773143] [2021-05-21 20:56:14,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:14,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:14,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:14,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:14,880 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:15,367 INFO L93 Difference]: Finished difference Result 2606 states and 6468 transitions. [2021-05-21 20:56:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:15,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:15,369 INFO L225 Difference]: With dead ends: 2606 [2021-05-21 20:56:15,369 INFO L226 Difference]: Without dead ends: 2568 [2021-05-21 20:56:15,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-05-21 20:56:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2448. [2021-05-21 20:56:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-05-21 20:56:15,388 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-05-21 20:56:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:15,388 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-05-21 20:56:15,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-05-21 20:56:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:15,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:15,390 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:15,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3259,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:15,590 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:15,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1629648834, now seen corresponding path program 212 times [2021-05-21 20:56:15,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:15,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190143374] [2021-05-21 20:56:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:16,147 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-05-21 20:56:16,340 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-05-21 20:56:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:16,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:16,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190143374] [2021-05-21 20:56:16,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190143374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:16,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422548181] [2021-05-21 20:56:16,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:16,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:56:16,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:16,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422548181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:16,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:16,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998519817] [2021-05-21 20:56:16,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:16,835 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:17,599 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-05-21 20:56:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:17,601 INFO L225 Difference]: With dead ends: 2598 [2021-05-21 20:56:17,601 INFO L226 Difference]: Without dead ends: 2560 [2021-05-21 20:56:17,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-05-21 20:56:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2456. [2021-05-21 20:56:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-05-21 20:56:17,620 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-05-21 20:56:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:17,620 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-05-21 20:56:17,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-05-21 20:56:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:17,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:17,622 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:17,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3275,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:17,822 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1611400702, now seen corresponding path program 213 times [2021-05-21 20:56:17,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:17,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323619129] [2021-05-21 20:56:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:18,778 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 16 [2021-05-21 20:56:19,238 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 10 [2021-05-21 20:56:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:19,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:19,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323619129] [2021-05-21 20:56:19,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323619129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:19,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713875573] [2021-05-21 20:56:19,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:19,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:56:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:19,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:19,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713875573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:19,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:19,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:19,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726548409] [2021-05-21 20:56:19,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:19,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:19,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:19,753 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:20,359 INFO L93 Difference]: Finished difference Result 2694 states and 6688 transitions. [2021-05-21 20:56:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:56:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:20,362 INFO L225 Difference]: With dead ends: 2694 [2021-05-21 20:56:20,362 INFO L226 Difference]: Without dead ends: 2656 [2021-05-21 20:56:20,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:56:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-05-21 20:56:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2480. [2021-05-21 20:56:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.491730536506656) internal successors, (6177), 2479 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6177 transitions. [2021-05-21 20:56:20,383 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6177 transitions. Word has length 32 [2021-05-21 20:56:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:20,383 INFO L482 AbstractCegarLoop]: Abstraction has 2480 states and 6177 transitions. [2021-05-21 20:56:20,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:20,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6177 transitions. [2021-05-21 20:56:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:20,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:20,384 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:20,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-05-21 20:56:20,585 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash -645396866, now seen corresponding path program 214 times [2021-05-21 20:56:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:20,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048516606] [2021-05-21 20:56:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:20,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048516606] [2021-05-21 20:56:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048516606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747133651] [2021-05-21 20:56:20,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:20,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:56:20,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747133651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:21,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:21,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464679699] [2021-05-21 20:56:21,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:21,175 INFO L87 Difference]: Start difference. First operand 2480 states and 6177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:21,652 INFO L93 Difference]: Finished difference Result 2622 states and 6508 transitions. [2021-05-21 20:56:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:56:21,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:21,655 INFO L225 Difference]: With dead ends: 2622 [2021-05-21 20:56:21,655 INFO L226 Difference]: Without dead ends: 2584 [2021-05-21 20:56:21,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:56:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-05-21 20:56:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2488. [2021-05-21 20:56:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-05-21 20:56:21,674 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-05-21 20:56:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:21,674 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-05-21 20:56:21,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-05-21 20:56:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:21,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:21,676 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:21,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:21,876 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash -457706566, now seen corresponding path program 215 times [2021-05-21 20:56:21,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:21,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143717186] [2021-05-21 20:56:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143717186] [2021-05-21 20:56:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143717186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83941746] [2021-05-21 20:56:22,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:22,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:56:22,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83941746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:22,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:22,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628379504] [2021-05-21 20:56:22,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:22,538 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:23,145 INFO L93 Difference]: Finished difference Result 2758 states and 6852 transitions. [2021-05-21 20:56:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:23,147 INFO L225 Difference]: With dead ends: 2758 [2021-05-21 20:56:23,147 INFO L226 Difference]: Without dead ends: 2728 [2021-05-21 20:56:23,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1016.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-05-21 20:56:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2488. [2021-05-21 20:56:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-05-21 20:56:23,168 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-05-21 20:56:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:23,168 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-05-21 20:56:23,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-05-21 20:56:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:23,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:23,170 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:23,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-05-21 20:56:23,371 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1254815034, now seen corresponding path program 216 times [2021-05-21 20:56:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339793319] [2021-05-21 20:56:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:23,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339793319] [2021-05-21 20:56:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339793319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265319421] [2021-05-21 20:56:23,501 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:23,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:56:23,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:23,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265319421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:23,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:23,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24721346] [2021-05-21 20:56:23,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:23,980 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:24,674 INFO L93 Difference]: Finished difference Result 2710 states and 6728 transitions. [2021-05-21 20:56:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:56:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:24,676 INFO L225 Difference]: With dead ends: 2710 [2021-05-21 20:56:24,676 INFO L226 Difference]: Without dead ends: 2672 [2021-05-21 20:56:24,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1002.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:56:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-05-21 20:56:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2504. [2021-05-21 20:56:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.4918098282061525) internal successors, (6237), 2503 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 6237 transitions. [2021-05-21 20:56:24,696 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 6237 transitions. Word has length 32 [2021-05-21 20:56:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:24,697 INFO L482 AbstractCegarLoop]: Abstraction has 2504 states and 6237 transitions. [2021-05-21 20:56:24,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 6237 transitions. [2021-05-21 20:56:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:24,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:24,698 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:24,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3347,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:24,899 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1746761730, now seen corresponding path program 217 times [2021-05-21 20:56:24,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:24,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115237632] [2021-05-21 20:56:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:25,615 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-05-21 20:56:31,704 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2021-05-21 20:56:33,771 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 70 DAG size of output: 17 [2021-05-21 20:56:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:33,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:33,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115237632] [2021-05-21 20:56:33,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115237632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:33,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526074587] [2021-05-21 20:56:33,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:33,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:33,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:34,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526074587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:34,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:34,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:34,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756764859] [2021-05-21 20:56:34,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:34,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:34,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:34,309 INFO L87 Difference]: Start difference. First operand 2504 states and 6237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:34,872 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-05-21 20:56:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:34,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:34,875 INFO L225 Difference]: With dead ends: 2734 [2021-05-21 20:56:34,875 INFO L226 Difference]: Without dead ends: 2704 [2021-05-21 20:56:34,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-05-21 20:56:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2520. [2021-05-21 20:56:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-05-21 20:56:34,897 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-05-21 20:56:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:34,897 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-05-21 20:56:34,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-05-21 20:56:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:34,899 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:34,899 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:35,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:35,099 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:35,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:35,099 INFO L82 PathProgramCache]: Analyzing trace with hash 817435834, now seen corresponding path program 218 times [2021-05-21 20:56:35,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:35,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602472482] [2021-05-21 20:56:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:35,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:35,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602472482] [2021-05-21 20:56:35,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602472482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:35,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869439727] [2021-05-21 20:56:35,456 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:35,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:56:35,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:35,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869439727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:35,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:35,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:35,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001195490] [2021-05-21 20:56:35,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:35,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:35,926 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:36,662 INFO L93 Difference]: Finished difference Result 2750 states and 6832 transitions. [2021-05-21 20:56:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:56:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:36,665 INFO L225 Difference]: With dead ends: 2750 [2021-05-21 20:56:36,665 INFO L226 Difference]: Without dead ends: 2720 [2021-05-21 20:56:36,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1104.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:56:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-05-21 20:56:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2520. [2021-05-21 20:56:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-05-21 20:56:36,686 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-05-21 20:56:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:36,686 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-05-21 20:56:36,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-05-21 20:56:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:36,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:36,688 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:36,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-05-21 20:56:36,888 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash -647640962, now seen corresponding path program 219 times [2021-05-21 20:56:36,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915593379] [2021-05-21 20:56:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:37,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:37,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915593379] [2021-05-21 20:56:37,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915593379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:37,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918196483] [2021-05-21 20:56:37,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:37,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:56:37,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:37,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:56:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:37,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918196483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:37,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:37,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:37,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826445307] [2021-05-21 20:56:37,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:37,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:37,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:37,395 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:37,957 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-05-21 20:56:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:56:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:37,960 INFO L225 Difference]: With dead ends: 2734 [2021-05-21 20:56:37,960 INFO L226 Difference]: Without dead ends: 2704 [2021-05-21 20:56:37,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:56:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-05-21 20:56:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2528. [2021-05-21 20:56:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.4918876137712704) internal successors, (6297), 2527 states have internal predecessors, (6297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6297 transitions. [2021-05-21 20:56:37,980 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6297 transitions. Word has length 32 [2021-05-21 20:56:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:37,981 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6297 transitions. [2021-05-21 20:56:37,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6297 transitions. [2021-05-21 20:56:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:37,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:37,982 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:38,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3407,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:38,183 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash 611497402, now seen corresponding path program 220 times [2021-05-21 20:56:38,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:38,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689423449] [2021-05-21 20:56:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:38,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:38,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689423449] [2021-05-21 20:56:38,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689423449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:38,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219345326] [2021-05-21 20:56:38,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:38,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:56:38,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:38,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219345326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:38,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:38,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:38,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395126880] [2021-05-21 20:56:38,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:38,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:38,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:38,851 INFO L87 Difference]: Start difference. First operand 2528 states and 6297 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:39,489 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-05-21 20:56:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:56:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:39,491 INFO L225 Difference]: With dead ends: 2814 [2021-05-21 20:56:39,491 INFO L226 Difference]: Without dead ends: 2784 [2021-05-21 20:56:39,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:56:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-05-21 20:56:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2544. [2021-05-21 20:56:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 2.491938655131734) internal successors, (6337), 2543 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 6337 transitions. [2021-05-21 20:56:39,511 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 6337 transitions. Word has length 32 [2021-05-21 20:56:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:39,511 INFO L482 AbstractCegarLoop]: Abstraction has 2544 states and 6337 transitions. [2021-05-21 20:56:39,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 6337 transitions. [2021-05-21 20:56:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:39,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:39,513 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:39,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3422,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:39,713 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 799187702, now seen corresponding path program 221 times [2021-05-21 20:56:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:39,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678344447] [2021-05-21 20:56:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:39,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:39,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678344447] [2021-05-21 20:56:39,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678344447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:39,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50052199] [2021-05-21 20:56:39,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:39,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:56:39,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:39,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:40,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50052199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:40,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:40,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:40,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800345268] [2021-05-21 20:56:40,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:40,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:40,331 INFO L87 Difference]: Start difference. First operand 2544 states and 6337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:40,962 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-05-21 20:56:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:40,965 INFO L225 Difference]: With dead ends: 2718 [2021-05-21 20:56:40,965 INFO L226 Difference]: Without dead ends: 2688 [2021-05-21 20:56:40,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 973.9ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-05-21 20:56:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2552. [2021-05-21 20:56:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-05-21 20:56:40,986 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-05-21 20:56:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:40,986 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-05-21 20:56:40,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-05-21 20:56:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:40,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:40,988 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:41,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3438 [2021-05-21 20:56:41,188 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:41,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2103347398, now seen corresponding path program 222 times [2021-05-21 20:56:41,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:41,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51705069] [2021-05-21 20:56:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:41,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:41,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51705069] [2021-05-21 20:56:41,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51705069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:41,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289574917] [2021-05-21 20:56:41,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:41,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:56:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:41,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289574917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:41,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:41,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:41,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374562985] [2021-05-21 20:56:41,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:41,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:41,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:41,860 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:42,635 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-05-21 20:56:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:42,638 INFO L225 Difference]: With dead ends: 2814 [2021-05-21 20:56:42,638 INFO L226 Difference]: Without dead ends: 2784 [2021-05-21 20:56:42,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1145.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-05-21 20:56:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2568. [2021-05-21 20:56:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-05-21 20:56:42,659 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-05-21 20:56:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:42,659 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-05-21 20:56:42,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-05-21 20:56:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:42,661 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:42,661 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:42,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3452 [2021-05-21 20:56:42,861 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 460850166, now seen corresponding path program 223 times [2021-05-21 20:56:42,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:42,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954925352] [2021-05-21 20:56:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:43,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:43,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954925352] [2021-05-21 20:56:43,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954925352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:43,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701800403] [2021-05-21 20:56:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:43,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:43,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:43,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701800403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:43,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:43,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:43,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205587689] [2021-05-21 20:56:43,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:43,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:43,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:43,479 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:44,108 INFO L93 Difference]: Finished difference Result 2798 states and 6956 transitions. [2021-05-21 20:56:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:56:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:44,110 INFO L225 Difference]: With dead ends: 2798 [2021-05-21 20:56:44,110 INFO L226 Difference]: Without dead ends: 2776 [2021-05-21 20:56:44,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 968.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:56:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-05-21 20:56:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2552. [2021-05-21 20:56:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-05-21 20:56:44,132 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-05-21 20:56:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:44,132 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-05-21 20:56:44,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-05-21 20:56:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:44,134 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:44,134 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:44,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-05-21 20:56:44,334 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash 698526078, now seen corresponding path program 224 times [2021-05-21 20:56:44,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:44,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029358220] [2021-05-21 20:56:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:44,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:44,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029358220] [2021-05-21 20:56:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029358220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:44,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867021547] [2021-05-21 20:56:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:44,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:56:44,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:44,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:44,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:44,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867021547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:44,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:44,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:44,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548277360] [2021-05-21 20:56:44,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:44,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:44,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:44,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:44,901 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:45,438 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-05-21 20:56:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:45,441 INFO L225 Difference]: With dead ends: 2798 [2021-05-21 20:56:45,441 INFO L226 Difference]: Without dead ends: 2760 [2021-05-21 20:56:45,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-05-21 20:56:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2576. [2021-05-21 20:56:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.4920388349514564) internal successors, (6417), 2575 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6417 transitions. [2021-05-21 20:56:45,460 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6417 transitions. Word has length 32 [2021-05-21 20:56:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:45,460 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 6417 transitions. [2021-05-21 20:56:45,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6417 transitions. [2021-05-21 20:56:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:45,462 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:45,462 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:45,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3494 [2021-05-21 20:56:45,663 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2145354742, now seen corresponding path program 225 times [2021-05-21 20:56:45,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:45,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839705601] [2021-05-21 20:56:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:45,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839705601] [2021-05-21 20:56:45,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839705601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:45,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233285542] [2021-05-21 20:56:45,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:45,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:56:45,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:45,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:46,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233285542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:46,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:46,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:46,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055427697] [2021-05-21 20:56:46,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:46,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:46,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:46,215 INFO L87 Difference]: Start difference. First operand 2576 states and 6417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:46,780 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-05-21 20:56:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:56:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:46,783 INFO L225 Difference]: With dead ends: 2742 [2021-05-21 20:56:46,783 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 20:56:46,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 805.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:56:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 20:56:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2568. [2021-05-21 20:56:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-05-21 20:56:46,806 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-05-21 20:56:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:46,806 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-05-21 20:56:46,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-05-21 20:56:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:46,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:46,808 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:47,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3515,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:47,021 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1619326906, now seen corresponding path program 226 times [2021-05-21 20:56:47,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:47,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628220355] [2021-05-21 20:56:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:47,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:47,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628220355] [2021-05-21 20:56:47,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628220355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:47,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267432786] [2021-05-21 20:56:47,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:47,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:56:47,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:47,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267432786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:47,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:47,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:47,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031674671] [2021-05-21 20:56:47,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:47,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:47,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:47,544 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:48,380 INFO L93 Difference]: Finished difference Result 2886 states and 7172 transitions. [2021-05-21 20:56:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:56:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:48,382 INFO L225 Difference]: With dead ends: 2886 [2021-05-21 20:56:48,382 INFO L226 Difference]: Without dead ends: 2856 [2021-05-21 20:56:48,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 969.5ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:56:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-05-21 20:56:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2600. [2021-05-21 20:56:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-05-21 20:56:48,403 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-05-21 20:56:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:48,403 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-05-21 20:56:48,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-05-21 20:56:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:48,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:48,405 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:48,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3537 [2021-05-21 20:56:48,609 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash -757180358, now seen corresponding path program 227 times [2021-05-21 20:56:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:48,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536378968] [2021-05-21 20:56:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536378968] [2021-05-21 20:56:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536378968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937333022] [2021-05-21 20:56:48,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:48,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:56:48,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:49,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937333022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:49,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:49,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:49,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777259292] [2021-05-21 20:56:49,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:49,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:49,258 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:49,928 INFO L93 Difference]: Finished difference Result 2910 states and 7232 transitions. [2021-05-21 20:56:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:49,930 INFO L225 Difference]: With dead ends: 2910 [2021-05-21 20:56:49,930 INFO L226 Difference]: Without dead ends: 2880 [2021-05-21 20:56:49,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 985.5ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-05-21 20:56:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2616. [2021-05-21 20:56:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-05-21 20:56:49,951 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-05-21 20:56:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:49,951 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-05-21 20:56:49,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-05-21 20:56:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:49,952 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:49,952 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:50,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:50,153 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1807017206, now seen corresponding path program 228 times [2021-05-21 20:56:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:50,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816786459] [2021-05-21 20:56:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816786459] [2021-05-21 20:56:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816786459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9922846] [2021-05-21 20:56:50,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:50,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:56:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:50,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:50,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9922846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:50,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:50,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:50,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303498578] [2021-05-21 20:56:50,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:50,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:50,767 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:51,371 INFO L93 Difference]: Finished difference Result 2894 states and 7196 transitions. [2021-05-21 20:56:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:56:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:51,373 INFO L225 Difference]: With dead ends: 2894 [2021-05-21 20:56:51,373 INFO L226 Difference]: Without dead ends: 2872 [2021-05-21 20:56:51,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:56:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-05-21 20:56:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2600. [2021-05-21 20:56:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-05-21 20:56:51,395 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-05-21 20:56:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:51,395 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-05-21 20:56:51,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-05-21 20:56:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:51,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:51,397 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:51,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3580 [2021-05-21 20:56:51,597 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:51,598 INFO L82 PathProgramCache]: Analyzing trace with hash 517962042, now seen corresponding path program 229 times [2021-05-21 20:56:51,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:51,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379108602] [2021-05-21 20:56:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:51,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:51,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379108602] [2021-05-21 20:56:51,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379108602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:51,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455612867] [2021-05-21 20:56:51,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:52,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455612867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:52,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:52,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71786610] [2021-05-21 20:56:52,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:52,224 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:52,833 INFO L93 Difference]: Finished difference Result 2822 states and 7008 transitions. [2021-05-21 20:56:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:56:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:52,836 INFO L225 Difference]: With dead ends: 2822 [2021-05-21 20:56:52,836 INFO L226 Difference]: Without dead ends: 2784 [2021-05-21 20:56:52,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 931.5ms TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:56:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-05-21 20:56:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2600. [2021-05-21 20:56:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-05-21 20:56:52,859 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-05-21 20:56:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:52,859 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-05-21 20:56:52,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-05-21 20:56:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:52,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:52,861 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:53,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:53,061 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1231055822, now seen corresponding path program 230 times [2021-05-21 20:56:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:53,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278681743] [2021-05-21 20:56:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:53,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278681743] [2021-05-21 20:56:53,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278681743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618977622] [2021-05-21 20:56:53,220 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:53,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:56:53,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:53,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618977622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:53,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:53,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:53,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626281076] [2021-05-21 20:56:53,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:53,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:53,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:53,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:53,624 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:54,264 INFO L93 Difference]: Finished difference Result 2926 states and 7264 transitions. [2021-05-21 20:56:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:56:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:54,267 INFO L225 Difference]: With dead ends: 2926 [2021-05-21 20:56:54,267 INFO L226 Difference]: Without dead ends: 2880 [2021-05-21 20:56:54,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:56:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-05-21 20:56:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2600. [2021-05-21 20:56:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-05-21 20:56:54,289 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-05-21 20:56:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:54,289 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-05-21 20:56:54,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-05-21 20:56:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:54,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:54,291 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:54,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:54,492 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1260497142, now seen corresponding path program 231 times [2021-05-21 20:56:54,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:54,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704422441] [2021-05-21 20:56:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:54,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:54,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704422441] [2021-05-21 20:56:54,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704422441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:54,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31203928] [2021-05-21 20:56:54,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:54,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:56:54,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:55,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31203928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:55,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:55,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911233547] [2021-05-21 20:56:55,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:55,015 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:55,545 INFO L93 Difference]: Finished difference Result 2782 states and 6908 transitions. [2021-05-21 20:56:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:55,548 INFO L225 Difference]: With dead ends: 2782 [2021-05-21 20:56:55,548 INFO L226 Difference]: Without dead ends: 2744 [2021-05-21 20:56:55,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-05-21 20:56:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2600. [2021-05-21 20:56:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-05-21 20:56:55,569 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-05-21 20:56:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:55,569 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-05-21 20:56:55,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-05-21 20:56:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:55,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:55,571 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:55,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3657 [2021-05-21 20:56:55,772 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1455933510, now seen corresponding path program 232 times [2021-05-21 20:56:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:55,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855846100] [2021-05-21 20:56:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:56,001 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 10 [2021-05-21 20:56:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:56,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:56,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855846100] [2021-05-21 20:56:56,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855846100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:56,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454406491] [2021-05-21 20:56:56,093 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:56,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:56:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:56,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:56,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:56,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454406491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:56,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:56,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:56,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595027129] [2021-05-21 20:56:56,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:56,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:56,457 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:57,105 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-05-21 20:56:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:56:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:57,108 INFO L225 Difference]: With dead ends: 2806 [2021-05-21 20:56:57,108 INFO L226 Difference]: Without dead ends: 2776 [2021-05-21 20:56:57,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:56:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-05-21 20:56:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2624. [2021-05-21 20:56:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-05-21 20:56:57,130 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-05-21 20:56:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:57,130 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-05-21 20:56:57,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-05-21 20:56:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:57,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:57,132 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:57,341 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash 462526522, now seen corresponding path program 233 times [2021-05-21 20:56:57,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:57,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402470980] [2021-05-21 20:56:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:57,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402470980] [2021-05-21 20:56:57,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402470980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559989] [2021-05-21 20:56:57,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:57,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:56:57,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:57,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:57,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:57,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:57,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461710312] [2021-05-21 20:56:57,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:57,952 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:56:58,518 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-05-21 20:56:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:56:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:56:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:56:58,521 INFO L225 Difference]: With dead ends: 2798 [2021-05-21 20:56:58,521 INFO L226 Difference]: Without dead ends: 2760 [2021-05-21 20:56:58,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:56:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-05-21 20:56:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-05-21 20:56:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-05-21 20:56:58,542 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-05-21 20:56:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:56:58,542 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-05-21 20:56:58,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:56:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-05-21 20:56:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:56:58,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:56:58,544 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:56:58,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-05-21 20:56:58,744 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:56:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:56:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash 124188986, now seen corresponding path program 234 times [2021-05-21 20:56:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:56:58,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189690449] [2021-05-21 20:56:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:56:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:56:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:58,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:56:58,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189690449] [2021-05-21 20:56:58,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189690449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:58,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755735387] [2021-05-21 20:56:58,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:56:58,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:56:58,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:56:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:56:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:56:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:56:59,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755735387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:56:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:56:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:56:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033175877] [2021-05-21 20:56:59,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:56:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:56:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:56:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:56:59,370 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:00,036 INFO L93 Difference]: Finished difference Result 2894 states and 7192 transitions. [2021-05-21 20:57:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:57:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:00,038 INFO L225 Difference]: With dead ends: 2894 [2021-05-21 20:57:00,039 INFO L226 Difference]: Without dead ends: 2864 [2021-05-21 20:57:00,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1008.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:57:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-05-21 20:57:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2640. [2021-05-21 20:57:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.4922319060250095) internal successors, (6577), 2639 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6577 transitions. [2021-05-21 20:57:00,060 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6577 transitions. Word has length 32 [2021-05-21 20:57:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:00,060 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 6577 transitions. [2021-05-21 20:57:00,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6577 transitions. [2021-05-21 20:57:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:00,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:00,062 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:00,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3715 [2021-05-21 20:57:00,262 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1606580746, now seen corresponding path program 235 times [2021-05-21 20:57:00,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:00,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227271228] [2021-05-21 20:57:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:00,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:00,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227271228] [2021-05-21 20:57:00,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227271228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:00,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631801969] [2021-05-21 20:57:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:00,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631801969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:00,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:00,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674979105] [2021-05-21 20:57:00,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:00,836 INFO L87 Difference]: Start difference. First operand 2640 states and 6577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:01,450 INFO L93 Difference]: Finished difference Result 2878 states and 7156 transitions. [2021-05-21 20:57:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:57:01,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:01,453 INFO L225 Difference]: With dead ends: 2878 [2021-05-21 20:57:01,453 INFO L226 Difference]: Without dead ends: 2856 [2021-05-21 20:57:01,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 877.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:57:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-05-21 20:57:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2616. [2021-05-21 20:57:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-05-21 20:57:01,485 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-05-21 20:57:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:01,485 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-05-21 20:57:01,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-05-21 20:57:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:01,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:01,487 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:01,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3735,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:01,688 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2103411910, now seen corresponding path program 236 times [2021-05-21 20:57:01,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:01,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538180303] [2021-05-21 20:57:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:01,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:01,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538180303] [2021-05-21 20:57:01,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538180303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:01,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64258449] [2021-05-21 20:57:01,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:01,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:57:01,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:01,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:01,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:02,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64258449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:02,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:02,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:02,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292471798] [2021-05-21 20:57:02,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:02,250 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:02,827 INFO L93 Difference]: Finished difference Result 2790 states and 6932 transitions. [2021-05-21 20:57:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:57:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:02,829 INFO L225 Difference]: With dead ends: 2790 [2021-05-21 20:57:02,829 INFO L226 Difference]: Without dead ends: 2760 [2021-05-21 20:57:02,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:57:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-05-21 20:57:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-05-21 20:57:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-05-21 20:57:02,849 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-05-21 20:57:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:02,850 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-05-21 20:57:02,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-05-21 20:57:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:02,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:02,851 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:03,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3757 [2021-05-21 20:57:03,052 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1042745718, now seen corresponding path program 237 times [2021-05-21 20:57:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:03,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857361681] [2021-05-21 20:57:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:03,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:03,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857361681] [2021-05-21 20:57:03,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857361681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:03,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749977766] [2021-05-21 20:57:03,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:03,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:57:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:03,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749977766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:03,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:03,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:03,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648238304] [2021-05-21 20:57:03,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:03,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:03,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:03,552 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:03,998 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-05-21 20:57:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:57:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:04,001 INFO L225 Difference]: With dead ends: 2774 [2021-05-21 20:57:04,001 INFO L226 Difference]: Without dead ends: 2744 [2021-05-21 20:57:04,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:57:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-05-21 20:57:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2632. [2021-05-21 20:57:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.492208285822881) internal successors, (6557), 2631 states have internal predecessors, (6557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6557 transitions. [2021-05-21 20:57:04,023 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6557 transitions. Word has length 32 [2021-05-21 20:57:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:04,023 INFO L482 AbstractCegarLoop]: Abstraction has 2632 states and 6557 transitions. [2021-05-21 20:57:04,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6557 transitions. [2021-05-21 20:57:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:04,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:04,025 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:04,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:04,225 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash -757244870, now seen corresponding path program 238 times [2021-05-21 20:57:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270057455] [2021-05-21 20:57:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:04,503 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 19 [2021-05-21 20:57:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:04,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:04,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270057455] [2021-05-21 20:57:04,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270057455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:04,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792418079] [2021-05-21 20:57:04,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:04,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:57:04,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:04,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792418079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:04,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:04,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:04,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296209146] [2021-05-21 20:57:04,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:04,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:04,925 INFO L87 Difference]: Start difference. First operand 2632 states and 6557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:05,625 INFO L93 Difference]: Finished difference Result 2766 states and 6876 transitions. [2021-05-21 20:57:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:57:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:05,628 INFO L225 Difference]: With dead ends: 2766 [2021-05-21 20:57:05,628 INFO L226 Difference]: Without dead ends: 2736 [2021-05-21 20:57:05,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 946.1ms TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:57:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-05-21 20:57:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2616. [2021-05-21 20:57:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-05-21 20:57:05,649 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-05-21 20:57:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:05,649 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-05-21 20:57:05,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-05-21 20:57:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:05,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:05,651 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:05,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3795,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:05,851 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:05,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1906054538, now seen corresponding path program 239 times [2021-05-21 20:57:05,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:05,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789124928] [2021-05-21 20:57:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:06,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789124928] [2021-05-21 20:57:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789124928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866400280] [2021-05-21 20:57:06,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:06,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:57:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866400280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:06,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:06,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:06,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558623182] [2021-05-21 20:57:06,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:06,352 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:06,906 INFO L93 Difference]: Finished difference Result 2898 states and 7143 transitions. [2021-05-21 20:57:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:57:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:06,909 INFO L225 Difference]: With dead ends: 2898 [2021-05-21 20:57:06,909 INFO L226 Difference]: Without dead ends: 2868 [2021-05-21 20:57:06,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:57:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-05-21 20:57:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2656. [2021-05-21 20:57:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4937853107344634) internal successors, (6621), 2655 states have internal predecessors, (6621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6621 transitions. [2021-05-21 20:57:06,930 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6621 transitions. Word has length 32 [2021-05-21 20:57:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:06,930 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6621 transitions. [2021-05-21 20:57:06,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6621 transitions. [2021-05-21 20:57:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:06,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:06,932 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:07,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3815,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:07,137 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash 639894894, now seen corresponding path program 240 times [2021-05-21 20:57:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:07,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159808722] [2021-05-21 20:57:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:07,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:07,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159808722] [2021-05-21 20:57:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159808722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:07,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734937041] [2021-05-21 20:57:07,310 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:07,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:57:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:07,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:07,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734937041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:07,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:07,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343524068] [2021-05-21 20:57:07,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:07,640 INFO L87 Difference]: Start difference. First operand 2656 states and 6621 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:08,084 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-05-21 20:57:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:57:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:08,086 INFO L225 Difference]: With dead ends: 2742 [2021-05-21 20:57:08,086 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 20:57:08,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:57:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 20:57:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2648. [2021-05-21 20:57:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-05-21 20:57:08,106 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-05-21 20:57:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:08,106 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-05-21 20:57:08,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-05-21 20:57:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:08,108 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:08,108 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:08,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3829 [2021-05-21 20:57:08,308 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash 468208630, now seen corresponding path program 241 times [2021-05-21 20:57:08,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:08,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542156784] [2021-05-21 20:57:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:08,649 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 13 [2021-05-21 20:57:08,797 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 10 [2021-05-21 20:57:08,984 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 9 [2021-05-21 20:57:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:09,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:09,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542156784] [2021-05-21 20:57:09,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542156784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:09,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111368770] [2021-05-21 20:57:09,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:57:09,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111368770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:09,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:09,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126681196] [2021-05-21 20:57:09,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:09,344 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:09,837 INFO L93 Difference]: Finished difference Result 2814 states and 6984 transitions. [2021-05-21 20:57:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:57:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:09,840 INFO L225 Difference]: With dead ends: 2814 [2021-05-21 20:57:09,840 INFO L226 Difference]: Without dead ends: 2768 [2021-05-21 20:57:09,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 677.0ms TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:57:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-05-21 20:57:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2648. [2021-05-21 20:57:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-05-21 20:57:09,864 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-05-21 20:57:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:09,864 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-05-21 20:57:09,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-05-21 20:57:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:09,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:09,866 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:10,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3843 [2021-05-21 20:57:10,066 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1915037294, now seen corresponding path program 242 times [2021-05-21 20:57:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:10,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154408346] [2021-05-21 20:57:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:10,440 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 12 [2021-05-21 20:57:10,669 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 10 [2021-05-21 20:57:10,907 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-05-21 20:57:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:10,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154408346] [2021-05-21 20:57:10,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154408346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049577452] [2021-05-21 20:57:10,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:11,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:57:11,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:11,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:11,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:11,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049577452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:11,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:11,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:11,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247320545] [2021-05-21 20:57:11,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:11,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:11,316 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:11,769 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-05-21 20:57:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:57:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:11,772 INFO L225 Difference]: With dead ends: 2806 [2021-05-21 20:57:11,772 INFO L226 Difference]: Without dead ends: 2776 [2021-05-21 20:57:11,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:57:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-05-21 20:57:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2648. [2021-05-21 20:57:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-05-21 20:57:11,793 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-05-21 20:57:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:11,793 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-05-21 20:57:11,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-05-21 20:57:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:57:11,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:11,795 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:11,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-05-21 20:57:11,995 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1558451626, now seen corresponding path program 243 times [2021-05-21 20:57:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:11,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274211335] [2021-05-21 20:57:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:12,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:57:12,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274211335] [2021-05-21 20:57:12,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274211335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:12,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775573676] [2021-05-21 20:57:12,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:12,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 20:57:12,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:57:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:57:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:57:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:57:12,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775573676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:57:12,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:57:12,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 20:57:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948406860] [2021-05-21 20:57:12,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:57:12,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:57:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:57:12,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:57:12,636 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:57:13,087 INFO L93 Difference]: Finished difference Result 2718 states and 6756 transitions. [2021-05-21 20:57:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:57:13,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 20:57:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:57:13,090 INFO L225 Difference]: With dead ends: 2718 [2021-05-21 20:57:13,090 INFO L226 Difference]: Without dead ends: 2696 [2021-05-21 20:57:13,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:57:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-05-21 20:57:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2656. [2021-05-21 20:57:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4922787193973637) internal successors, (6617), 2655 states have internal predecessors, (6617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6617 transitions. [2021-05-21 20:57:13,111 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6617 transitions. Word has length 32 [2021-05-21 20:57:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:57:13,111 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6617 transitions. [2021-05-21 20:57:13,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:57:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6617 transitions. [2021-05-21 20:57:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 20:57:13,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:57:13,113 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:57:13,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3872,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:57:13,313 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:57:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:57:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1344530956, now seen corresponding path program 6 times [2021-05-21 20:57:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:57:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857873696] [2021-05-21 20:57:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:57:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:57:14,369 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 15 [2021-05-21 21:05:05,367 WARN L205 SmtUtils]: Spent 7.85 m on a formula simplification. DAG size of input: 115 DAG size of output: 13 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown