/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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:26:54,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:26:54,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:26:54,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:26:54,470 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 21:26:54,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:26:54,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:26:54,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:26:54,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:26:54,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:26:54,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:26:54,508 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:26:54,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:26:54,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:26:54,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:26:54,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:26:54,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:26:54,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:26:54,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:26:54,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:26:54,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:26:54,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:26:54,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:26:54,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:26:54,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:26:54,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:26:54,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:26:54,824 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:26:54,828 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:26:54,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-05-21 21:26:54,829 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-05-21 21:26:54,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:26:54,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:26:54,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:26:54,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:26:54,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:26:54,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:26:54,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:26:54,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:26:54,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:26:54,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/1) ... [2021-05-21 21:26:54,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:26:54,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:26:54,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:26:54,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:26:54,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (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 21:26:54,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:26:54,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:26:54,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:26:54,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:26:54,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:26:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:26:54,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:26:54,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:26:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:26:54,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:26:54,986 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 21:26:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 21:26:54,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 21:26:54,987 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 21:26:55,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:26:55,187 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:26:55,188 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:26:55 BoogieIcfgContainer [2021-05-21 21:26:55,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:26:55,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:26:55,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:26:55,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:26:55,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:26:54" (1/2) ... [2021-05-21 21:26:55,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b58f1f and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:26:55, skipping insertion in model container [2021-05-21 21:26:55,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:26:55" (2/2) ... [2021-05-21 21:26:55,194 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-05-21 21:26:55,199 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:26:55,199 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:26:55,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:26:55,200 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:26:55,298 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-21 21:26:55,343 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 21:26:55,358 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:26:55,358 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:26:55,359 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:26:55,359 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:26:55,359 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:26:55,359 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:26:55,359 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:26:55,359 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:26:55,366 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-05-21 21:26:55,461 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:26:55,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:55,491 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:55,492 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -39669396, now seen corresponding path program 1 times [2021-05-21 21:26:55,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:55,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482374384] [2021-05-21 21:26:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:55,679 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 21:26:55,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:55,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482374384] [2021-05-21 21:26:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482374384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:26:55,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:26:55,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:26:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217371016] [2021-05-21 21:26:55,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:26:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:26:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:26:55,705 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:55,776 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-05-21 21:26:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:26:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:26:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:55,797 INFO L225 Difference]: With dead ends: 854 [2021-05-21 21:26:55,798 INFO L226 Difference]: Without dead ends: 823 [2021-05-21 21:26:55,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:26:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-05-21 21:26:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-05-21 21:26:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-05-21 21:26:55,905 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-05-21 21:26:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:55,906 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-05-21 21:26:55,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-05-21 21:26:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:26:55,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:55,909 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:55,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:26:55,909 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1569931572, now seen corresponding path program 1 times [2021-05-21 21:26:55,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:55,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563559049] [2021-05-21 21:26:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:55,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:55,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563559049] [2021-05-21 21:26:55,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563559049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:55,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716876043] [2021-05-21 21:26:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 21:26:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:56,127 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 21:26:56,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716876043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:56,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:56,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 21:26:56,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532926252] [2021-05-21 21:26:56,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:26:56,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:56,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:26:56,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:56,131 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:56,263 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-05-21 21:26:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:26:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:26:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:56,274 INFO L225 Difference]: With dead ends: 1573 [2021-05-21 21:26:56,274 INFO L226 Difference]: Without dead ends: 1573 [2021-05-21 21:26:56,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:26:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-05-21 21:26:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-05-21 21:26:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-05-21 21:26:56,335 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-05-21 21:26:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:56,335 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-05-21 21:26:56,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-05-21 21:26:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:26:56,339 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:56,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:56,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 21:26:56,554 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1597271150, now seen corresponding path program 1 times [2021-05-21 21:26:56,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:56,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572720550] [2021-05-21 21:26:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:56,598 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 21:26:56,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:56,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572720550] [2021-05-21 21:26:56,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572720550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:56,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952798208] [2021-05-21 21:26:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 21:26:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:56,687 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 21:26:56,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952798208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:56,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:56,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 21:26:56,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637914907] [2021-05-21 21:26:56,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:26:56,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:26:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:56,689 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:56,784 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-05-21 21:26:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:26:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:26:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:56,796 INFO L225 Difference]: With dead ends: 1748 [2021-05-21 21:26:56,796 INFO L226 Difference]: Without dead ends: 1748 [2021-05-21 21:26:56,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:26:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-05-21 21:26:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-05-21 21:26:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-05-21 21:26:56,840 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-05-21 21:26:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:56,840 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-05-21 21:26:56,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-05-21 21:26:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:26:56,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:56,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:57,068 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1296417938, now seen corresponding path program 1 times [2021-05-21 21:26:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259193372] [2021-05-21 21:26:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:57,123 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 21:26:57,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:57,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259193372] [2021-05-21 21:26:57,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259193372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:26:57,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:26:57,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:26:57,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934129728] [2021-05-21 21:26:57,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:26:57,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:57,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:26:57,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:26:57,126 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:57,207 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-05-21 21:26:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:26:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:26:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:57,213 INFO L225 Difference]: With dead ends: 997 [2021-05-21 21:26:57,213 INFO L226 Difference]: Without dead ends: 884 [2021-05-21 21:26:57,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:26:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-21 21:26:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-05-21 21:26:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-05-21 21:26:57,241 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-05-21 21:26:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:57,242 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-05-21 21:26:57,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-05-21 21:26:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:26:57,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:57,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:57,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:26:57,246 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -845683858, now seen corresponding path program 2 times [2021-05-21 21:26:57,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:57,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002897715] [2021-05-21 21:26:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:57,300 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 21:26:57,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:57,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002897715] [2021-05-21 21:26:57,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002897715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:26:57,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:26:57,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:26:57,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035247156] [2021-05-21 21:26:57,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:26:57,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:26:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:26:57,303 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:57,355 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-05-21 21:26:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:26:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:26:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:57,362 INFO L225 Difference]: With dead ends: 949 [2021-05-21 21:26:57,362 INFO L226 Difference]: Without dead ends: 949 [2021-05-21 21:26:57,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:26:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-05-21 21:26:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-05-21 21:26:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-05-21 21:26:57,387 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-05-21 21:26:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:57,388 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-05-21 21:26:57,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-05-21 21:26:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:26:57,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:57,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:26:57,392 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash -105864754, now seen corresponding path program 1 times [2021-05-21 21:26:57,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:57,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895559120] [2021-05-21 21:26:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:57,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:57,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895559120] [2021-05-21 21:26:57,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895559120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876174387] [2021-05-21 21:26:57,472 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 21:26:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:26:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:57,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876174387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:57,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:57,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 21:26:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019921232] [2021-05-21 21:26:57,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:26:57,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:26:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:26:57,570 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:57,687 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-05-21 21:26:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:26:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:26:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:57,695 INFO L225 Difference]: With dead ends: 1389 [2021-05-21 21:26:57,695 INFO L226 Difference]: Without dead ends: 1389 [2021-05-21 21:26:57,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:26:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-05-21 21:26:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-05-21 21:26:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-05-21 21:26:57,726 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-05-21 21:26:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:57,726 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-05-21 21:26:57,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-05-21 21:26:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:26:57,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:57,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:57,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:57,945 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 993256014, now seen corresponding path program 1 times [2021-05-21 21:26:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:57,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886235568] [2021-05-21 21:26:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:58,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:58,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886235568] [2021-05-21 21:26:58,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886235568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:58,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640622413] [2021-05-21 21:26:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:26:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:58,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:26:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:58,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640622413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:58,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:58,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:26:58,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994624872] [2021-05-21 21:26:58,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:26:58,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:58,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:26:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:58,135 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:58,198 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-05-21 21:26:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:26:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:26:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:58,209 INFO L225 Difference]: With dead ends: 1781 [2021-05-21 21:26:58,209 INFO L226 Difference]: Without dead ends: 1738 [2021-05-21 21:26:58,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-05-21 21:26:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-05-21 21:26:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-05-21 21:26:58,251 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-05-21 21:26:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:58,251 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-05-21 21:26:58,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-05-21 21:26:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:26:58,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:58,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:58,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:58,469 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-05-21 21:26:58,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:58,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129661375] [2021-05-21 21:26:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:58,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:58,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129661375] [2021-05-21 21:26:58,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129661375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:58,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392751291] [2021-05-21 21:26:58,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:26:58,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:26:58,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:58,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:26:58,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392751291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:58,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:58,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:26:58,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961132156] [2021-05-21 21:26:58,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:26:58,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:26:58,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:58,681 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:58,746 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-05-21 21:26:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:26:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:26:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:58,757 INFO L225 Difference]: With dead ends: 1504 [2021-05-21 21:26:58,757 INFO L226 Difference]: Without dead ends: 1461 [2021-05-21 21:26:58,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-05-21 21:26:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-05-21 21:26:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-05-21 21:26:58,820 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-05-21 21:26:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:58,820 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-05-21 21:26:58,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-05-21 21:26:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:26:58,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:58,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:59,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:59,046 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-05-21 21:26:59,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:59,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944126303] [2021-05-21 21:26:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:26:59,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:59,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944126303] [2021-05-21 21:26:59,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944126303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:59,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681897609] [2021-05-21 21:26:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:26:59,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:26:59,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:59,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:26:59,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:26:59,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681897609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:59,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:59,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:26:59,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118659473] [2021-05-21 21:26:59,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:26:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:26:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:59,205 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:59,264 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-05-21 21:26:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:26:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:26:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:59,272 INFO L225 Difference]: With dead ends: 1444 [2021-05-21 21:26:59,272 INFO L226 Difference]: Without dead ends: 1401 [2021-05-21 21:26:59,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-05-21 21:26:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-05-21 21:26:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-05-21 21:26:59,306 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-05-21 21:26:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:59,306 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-05-21 21:26:59,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-05-21 21:26:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:26:59,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:59,310 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:26:59,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:59,523 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash -154583568, now seen corresponding path program 1 times [2021-05-21 21:26:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:59,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219094577] [2021-05-21 21:26:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:59,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219094577] [2021-05-21 21:26:59,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219094577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817560081] [2021-05-21 21:26:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:26:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:26:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:26:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817560081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:59,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:59,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:26:59,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870608148] [2021-05-21 21:26:59,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:26:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:59,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:26:59,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:59,680 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:26:59,746 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-05-21 21:26:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:26:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:26:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:26:59,760 INFO L225 Difference]: With dead ends: 2517 [2021-05-21 21:26:59,760 INFO L226 Difference]: Without dead ends: 2474 [2021-05-21 21:26:59,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:26:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-05-21 21:26:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-05-21 21:26:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-05-21 21:26:59,806 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-05-21 21:26:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:59,806 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-05-21 21:26:59,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-05-21 21:26:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:26:59,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:59,810 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:00,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:27:00,026 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1613744344, now seen corresponding path program 2 times [2021-05-21 21:27:00,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:00,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432277093] [2021-05-21 21:27:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:00,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432277093] [2021-05-21 21:27:00,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432277093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867614392] [2021-05-21 21:27:00,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:00,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:00,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867614392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:00,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:00,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131689170] [2021-05-21 21:27:00,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:00,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:00,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:00,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:00,177 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:00,250 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-05-21 21:27:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:00,257 INFO L225 Difference]: With dead ends: 2128 [2021-05-21 21:27:00,257 INFO L226 Difference]: Without dead ends: 2085 [2021-05-21 21:27:00,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-05-21 21:27:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-05-21 21:27:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-05-21 21:27:00,297 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-05-21 21:27:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:00,297 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-05-21 21:27:00,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-05-21 21:27:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:00,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:00,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:00,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-21 21:27:00,517 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash 909626392, now seen corresponding path program 3 times [2021-05-21 21:27:00,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:00,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444041995] [2021-05-21 21:27:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:00,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444041995] [2021-05-21 21:27:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444041995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959724887] [2021-05-21 21:27:00,572 INFO L93 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 21:27:00,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:27:00,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:00,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959724887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:00,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:00,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:00,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628065060] [2021-05-21 21:27:00,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:00,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:00,675 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:00,766 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-05-21 21:27:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:00,773 INFO L225 Difference]: With dead ends: 2247 [2021-05-21 21:27:00,773 INFO L226 Difference]: Without dead ends: 2204 [2021-05-21 21:27:00,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-05-21 21:27:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-05-21 21:27:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-05-21 21:27:00,812 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-05-21 21:27:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:00,812 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-05-21 21:27:00,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-05-21 21:27:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:00,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:00,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:01,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:01,034 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:01,034 INFO L82 PathProgramCache]: Analyzing trace with hash -461480336, now seen corresponding path program 1 times [2021-05-21 21:27:01,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:01,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479107074] [2021-05-21 21:27:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:01,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:01,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479107074] [2021-05-21 21:27:01,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479107074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:27:01,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:27:01,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:27:01,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154786125] [2021-05-21 21:27:01,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:27:01,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:27:01,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:27:01,072 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:01,108 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-05-21 21:27:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:27:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:01,112 INFO L225 Difference]: With dead ends: 1413 [2021-05-21 21:27:01,112 INFO L226 Difference]: Without dead ends: 1413 [2021-05-21 21:27:01,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:27:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-05-21 21:27:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-05-21 21:27:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-05-21 21:27:01,141 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-05-21 21:27:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:01,141 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-05-21 21:27:01,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-05-21 21:27:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:01,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:01,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:01,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-21 21:27:01,145 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1970176528, now seen corresponding path program 4 times [2021-05-21 21:27:01,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:01,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709447565] [2021-05-21 21:27:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:01,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:01,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709447565] [2021-05-21 21:27:01,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709447565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:01,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056097335] [2021-05-21 21:27:01,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:01,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:01,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056097335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:01,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:01,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913096479] [2021-05-21 21:27:01,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:01,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:01,276 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:01,334 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-05-21 21:27:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:01,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:01,342 INFO L225 Difference]: With dead ends: 2930 [2021-05-21 21:27:01,343 INFO L226 Difference]: Without dead ends: 2887 [2021-05-21 21:27:01,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-05-21 21:27:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-05-21 21:27:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-05-21 21:27:01,385 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-05-21 21:27:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:01,385 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-05-21 21:27:01,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-05-21 21:27:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:01,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:01,390 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:01,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:01,613 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash -210123588, now seen corresponding path program 5 times [2021-05-21 21:27:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:01,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971205449] [2021-05-21 21:27:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:01,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:01,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971205449] [2021-05-21 21:27:01,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971205449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:01,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495600853] [2021-05-21 21:27:01,652 INFO L93 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 21:27:01,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:27:01,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:01,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495600853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:01,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:01,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:01,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294375953] [2021-05-21 21:27:01,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:01,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:01,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:01,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:01,758 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:01,827 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-05-21 21:27:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:01,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:01,834 INFO L225 Difference]: With dead ends: 2434 [2021-05-21 21:27:01,834 INFO L226 Difference]: Without dead ends: 2391 [2021-05-21 21:27:01,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-05-21 21:27:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-05-21 21:27:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-05-21 21:27:01,873 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-05-21 21:27:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:01,873 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-05-21 21:27:01,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-05-21 21:27:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:01,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:01,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:02,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:27:02,093 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1981720148, now seen corresponding path program 6 times [2021-05-21 21:27:02,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:02,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573792434] [2021-05-21 21:27:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:02,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:02,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573792434] [2021-05-21 21:27:02,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573792434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:02,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316237218] [2021-05-21 21:27:02,131 INFO L93 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 21:27:02,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:27:02,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316237218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:02,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:02,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 21:27:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268933705] [2021-05-21 21:27:02,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:02,238 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 21:27:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:02,348 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-05-21 21:27:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:27:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 23 [2021-05-21 21:27:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:02,356 INFO L225 Difference]: With dead ends: 2600 [2021-05-21 21:27:02,356 INFO L226 Difference]: Without dead ends: 2557 [2021-05-21 21:27:02,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:27:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-05-21 21:27:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-05-21 21:27:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-05-21 21:27:02,396 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-05-21 21:27:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:02,397 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-05-21 21:27:02,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 21:27:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-05-21 21:27:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:02,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:02,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:02,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:27:02,623 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash 157052528, now seen corresponding path program 2 times [2021-05-21 21:27:02,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:02,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614107052] [2021-05-21 21:27:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:02,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:02,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614107052] [2021-05-21 21:27:02,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614107052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:27:02,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:27:02,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:27:02,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079949613] [2021-05-21 21:27:02,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:27:02,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:02,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:27:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:27:02,649 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:02,739 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-05-21 21:27:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:27:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:02,745 INFO L225 Difference]: With dead ends: 1899 [2021-05-21 21:27:02,745 INFO L226 Difference]: Without dead ends: 1866 [2021-05-21 21:27:02,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:27:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-05-21 21:27:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-05-21 21:27:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-05-21 21:27:02,784 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-05-21 21:27:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:02,784 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-05-21 21:27:02,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-05-21 21:27:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:02,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:02,788 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:02,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-21 21:27:02,788 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-05-21 21:27:02,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:02,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423605696] [2021-05-21 21:27:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:02,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:02,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423605696] [2021-05-21 21:27:02,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423605696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:02,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552821768] [2021-05-21 21:27:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:02,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:27:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:02,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552821768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:02,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:02,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-21 21:27:02,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539408599] [2021-05-21 21:27:02,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:02,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:02,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:02,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:02,898 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:27:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:03,055 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-05-21 21:27:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:27:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 23 [2021-05-21 21:27:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:03,066 INFO L225 Difference]: With dead ends: 3584 [2021-05-21 21:27:03,066 INFO L226 Difference]: Without dead ends: 3584 [2021-05-21 21:27:03,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:27:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-05-21 21:27:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-05-21 21:27:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-05-21 21:27:03,124 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-05-21 21:27:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:03,124 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-05-21 21:27:03,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:27:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-05-21 21:27:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:03,129 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:03,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:03,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:27:03,349 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-05-21 21:27:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:03,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857516737] [2021-05-21 21:27:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:03,372 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 21:27:03,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:03,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857516737] [2021-05-21 21:27:03,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857516737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:03,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106736334] [2021-05-21 21:27:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:27:03,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:27:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:27:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:03,489 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 21:27:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106736334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:03,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:03,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-21 21:27:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511047189] [2021-05-21 21:27:03,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:03,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:03,491 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:27:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:03,728 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-05-21 21:27:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:27:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 23 [2021-05-21 21:27:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:03,737 INFO L225 Difference]: With dead ends: 4126 [2021-05-21 21:27:03,737 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 21:27:03,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:27:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 21:27:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-05-21 21:27:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-05-21 21:27:03,802 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-05-21 21:27:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:03,802 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-05-21 21:27:03,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:27:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-05-21 21:27:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:03,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:03,808 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:04,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:04,031 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-05-21 21:27:04,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:04,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639303430] [2021-05-21 21:27:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:04,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639303430] [2021-05-21 21:27:04,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639303430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093603457] [2021-05-21 21:27:04,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:04,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093603457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:04,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:04,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12913328] [2021-05-21 21:27:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:04,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:04,182 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:04,271 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-05-21 21:27:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:04,278 INFO L225 Difference]: With dead ends: 2707 [2021-05-21 21:27:04,278 INFO L226 Difference]: Without dead ends: 2643 [2021-05-21 21:27:04,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-05-21 21:27:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-05-21 21:27:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-05-21 21:27:04,357 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-05-21 21:27:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:04,358 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-05-21 21:27:04,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-05-21 21:27:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:04,363 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:04,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:04,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:04,579 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-05-21 21:27:04,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:04,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118173020] [2021-05-21 21:27:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:04,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118173020] [2021-05-21 21:27:04,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118173020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005896366] [2021-05-21 21:27:04,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:27:04,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:27:04,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:04,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:04,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005896366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:04,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:04,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:04,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609021903] [2021-05-21 21:27:04,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:04,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:04,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:04,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:04,699 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:04,776 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-05-21 21:27:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:04,782 INFO L225 Difference]: With dead ends: 2722 [2021-05-21 21:27:04,782 INFO L226 Difference]: Without dead ends: 2658 [2021-05-21 21:27:04,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-05-21 21:27:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-05-21 21:27:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-05-21 21:27:04,828 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-05-21 21:27:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:04,829 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-05-21 21:27:04,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-05-21 21:27:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:04,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:04,835 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:05,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:05,058 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-05-21 21:27:05,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:05,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172449069] [2021-05-21 21:27:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:05,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172449069] [2021-05-21 21:27:05,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172449069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508011522] [2021-05-21 21:27:05,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:27:05,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:27:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:27:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508011522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:05,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:05,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:27:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248136318] [2021-05-21 21:27:05,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:27:05,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:27:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:05,173 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:05,234 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-05-21 21:27:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:27:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:05,240 INFO L225 Difference]: With dead ends: 3086 [2021-05-21 21:27:05,240 INFO L226 Difference]: Without dead ends: 3022 [2021-05-21 21:27:05,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:27:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-05-21 21:27:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-05-21 21:27:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-05-21 21:27:05,284 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-05-21 21:27:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:05,284 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-05-21 21:27:05,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-05-21 21:27:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:05,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:05,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:05,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:27:05,512 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-05-21 21:27:05,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:05,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132038615] [2021-05-21 21:27:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:05,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:05,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132038615] [2021-05-21 21:27:05,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132038615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:27:05,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:27:05,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:27:05,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776809743] [2021-05-21 21:27:05,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:27:05,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:27:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:27:05,531 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:05,572 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-05-21 21:27:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:27:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:05,578 INFO L225 Difference]: With dead ends: 2525 [2021-05-21 21:27:05,578 INFO L226 Difference]: Without dead ends: 2525 [2021-05-21 21:27:05,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:27:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-05-21 21:27:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-05-21 21:27:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-05-21 21:27:05,620 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-05-21 21:27:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:05,620 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-05-21 21:27:05,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-05-21 21:27:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:05,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:05,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:05,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-21 21:27:05,626 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-05-21 21:27:05,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:05,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794812304] [2021-05-21 21:27:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:05,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:05,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794812304] [2021-05-21 21:27:05,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794812304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:05,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109129196] [2021-05-21 21:27:05,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 21:27:05,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:27:05,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:05,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109129196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:05,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:05,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 21:27:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718703111] [2021-05-21 21:27:05,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:27:05,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:27:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:27:05,748 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:05,867 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-05-21 21:27:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:27:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:05,874 INFO L225 Difference]: With dead ends: 3537 [2021-05-21 21:27:05,874 INFO L226 Difference]: Without dead ends: 3537 [2021-05-21 21:27:05,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:27:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-05-21 21:27:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-05-21 21:27:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-05-21 21:27:05,929 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-05-21 21:27:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:05,929 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-05-21 21:27:05,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-05-21 21:27:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:05,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:05,937 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:06,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 21:27:06,142 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-05-21 21:27:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:06,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258960952] [2021-05-21 21:27:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:06,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258960952] [2021-05-21 21:27:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258960952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567248793] [2021-05-21 21:27:06,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:06,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:27:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:27:06,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:06,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567248793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:06,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:06,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-21 21:27:06,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192858481] [2021-05-21 21:27:06,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:06,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:06,274 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:06,432 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-05-21 21:27:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:27:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:06,450 INFO L225 Difference]: With dead ends: 5435 [2021-05-21 21:27:06,450 INFO L226 Difference]: Without dead ends: 5435 [2021-05-21 21:27:06,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:27:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-05-21 21:27:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-05-21 21:27:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-05-21 21:27:06,560 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-05-21 21:27:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:06,560 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-05-21 21:27:06,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-05-21 21:27:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:27:06,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:06,569 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:06,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:27:06,777 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-05-21 21:27:06,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:06,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152816550] [2021-05-21 21:27:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:06,798 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 21:27:06,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152816550] [2021-05-21 21:27:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152816550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5886472] [2021-05-21 21:27:06,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:27:06,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:27:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:27:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:06,909 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 21:27:06,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5886472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:06,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:06,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-05-21 21:27:06,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244379561] [2021-05-21 21:27:06,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:06,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:06,911 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:07,149 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-05-21 21:27:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:27:07,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:27:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:07,163 INFO L225 Difference]: With dead ends: 6635 [2021-05-21 21:27:07,163 INFO L226 Difference]: Without dead ends: 6635 [2021-05-21 21:27:07,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:27:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-05-21 21:27:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-05-21 21:27:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-05-21 21:27:07,271 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-05-21 21:27:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:07,271 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-05-21 21:27:07,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-05-21 21:27:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:07,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:07,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:07,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:27:07,505 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1097839692, now seen corresponding path program 7 times [2021-05-21 21:27:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:07,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212282482] [2021-05-21 21:27:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:07,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:07,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212282482] [2021-05-21 21:27:07,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212282482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:07,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452624100] [2021-05-21 21:27:07,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:27:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:07,638 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 21:27:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452624100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:07,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:07,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 21:27:07,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921261889] [2021-05-21 21:27:07,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:27:07,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:27:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:27:07,640 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:07,891 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-05-21 21:27:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:27:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:07,907 INFO L225 Difference]: With dead ends: 8080 [2021-05-21 21:27:07,907 INFO L226 Difference]: Without dead ends: 7806 [2021-05-21 21:27:07,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:27:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-05-21 21:27:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-05-21 21:27:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-05-21 21:27:08,046 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-05-21 21:27:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:08,046 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-05-21 21:27:08,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-05-21 21:27:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:08,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:08,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:08,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:27:08,257 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:08,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1886925744, now seen corresponding path program 4 times [2021-05-21 21:27:08,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:08,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925646215] [2021-05-21 21:27:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:08,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925646215] [2021-05-21 21:27:08,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925646215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:08,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181666655] [2021-05-21 21:27:08,315 INFO L93 rtionOrderModulation]: Changing 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 21:27:08,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:08,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:27:08,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:08,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181666655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:08,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:08,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:27:08,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935540986] [2021-05-21 21:27:08,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:08,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:08,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:08,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:08,394 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:08,570 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-05-21 21:27:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:27:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:08,586 INFO L225 Difference]: With dead ends: 7686 [2021-05-21 21:27:08,586 INFO L226 Difference]: Without dead ends: 7610 [2021-05-21 21:27:08,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-05-21 21:27:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-05-21 21:27:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-05-21 21:27:08,693 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-05-21 21:27:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:08,694 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-05-21 21:27:08,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-05-21 21:27:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:08,705 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:08,705 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:08,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:08,905 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash -787804976, now seen corresponding path program 1 times [2021-05-21 21:27:08,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:08,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367394198] [2021-05-21 21:27:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:08,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367394198] [2021-05-21 21:27:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367394198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904087846] [2021-05-21 21:27:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:27:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:09,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904087846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:09,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:09,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:27:09,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053355150] [2021-05-21 21:27:09,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:27:09,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:27:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:27:09,066 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:09,504 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-05-21 21:27:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:27:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:09,536 INFO L225 Difference]: With dead ends: 13992 [2021-05-21 21:27:09,536 INFO L226 Difference]: Without dead ends: 13926 [2021-05-21 21:27:09,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:27:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-05-21 21:27:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-05-21 21:27:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-05-21 21:27:09,738 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-05-21 21:27:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:09,738 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-05-21 21:27:09,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-05-21 21:27:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:09,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:09,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:09,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 21:27:09,954 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:09,954 INFO L82 PathProgramCache]: Analyzing trace with hash -717911412, now seen corresponding path program 2 times [2021-05-21 21:27:09,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:09,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635930262] [2021-05-21 21:27:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:09,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:09,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635930262] [2021-05-21 21:27:09,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635930262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:09,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434920927] [2021-05-21 21:27:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:10,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:10,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:10,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434920927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:10,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:10,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:27:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812845579] [2021-05-21 21:27:10,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:27:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:27:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:27:10,121 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:10,655 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-05-21 21:27:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:27:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:10,683 INFO L225 Difference]: With dead ends: 12594 [2021-05-21 21:27:10,683 INFO L226 Difference]: Without dead ends: 12594 [2021-05-21 21:27:10,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:27:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-05-21 21:27:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-05-21 21:27:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-05-21 21:27:10,884 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-05-21 21:27:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:10,885 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-05-21 21:27:10,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-05-21 21:27:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:10,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:10,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:11,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:11,101 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1056551404, now seen corresponding path program 3 times [2021-05-21 21:27:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:11,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059261966] [2021-05-21 21:27:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:11,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:11,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059261966] [2021-05-21 21:27:11,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059261966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428913325] [2021-05-21 21:27:11,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:11,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:27:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:27:11,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:11,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428913325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:11,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:11,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 21:27:11,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502215431] [2021-05-21 21:27:11,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:27:11,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:11,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:27:11,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:27:11,336 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:12,060 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-05-21 21:27:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:27:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:12,153 INFO L225 Difference]: With dead ends: 29971 [2021-05-21 21:27:12,153 INFO L226 Difference]: Without dead ends: 29848 [2021-05-21 21:27:12,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:27:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-05-21 21:27:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-05-21 21:27:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-05-21 21:27:12,580 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-05-21 21:27:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:12,580 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-05-21 21:27:12,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-05-21 21:27:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:12,607 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:12,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:12,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 21:27:12,809 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash -839523414, now seen corresponding path program 4 times [2021-05-21 21:27:12,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:12,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710261113] [2021-05-21 21:27:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:12,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710261113] [2021-05-21 21:27:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710261113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421851498] [2021-05-21 21:27:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:12,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:12,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:27:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421851498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:12,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:12,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-05-21 21:27:12,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736728780] [2021-05-21 21:27:12,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:27:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:12,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:27:12,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:27:12,997 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:13,561 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-05-21 21:27:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:27:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:13,644 INFO L225 Difference]: With dead ends: 31001 [2021-05-21 21:27:13,644 INFO L226 Difference]: Without dead ends: 30851 [2021-05-21 21:27:13,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:27:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-05-21 21:27:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-05-21 21:27:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-05-21 21:27:14,275 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-05-21 21:27:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:14,275 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-05-21 21:27:14,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-05-21 21:27:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:14,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:14,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:14,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:14,525 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1905173876, now seen corresponding path program 5 times [2021-05-21 21:27:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:14,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803036914] [2021-05-21 21:27:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:14,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803036914] [2021-05-21 21:27:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803036914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863206202] [2021-05-21 21:27:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:14,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:27:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:14,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863206202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:14,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:14,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:27:14,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361607296] [2021-05-21 21:27:14,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:27:14,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:27:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:27:14,741 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:27:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:15,114 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-05-21 21:27:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:27:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-05-21 21:27:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:15,189 INFO L225 Difference]: With dead ends: 27651 [2021-05-21 21:27:15,189 INFO L226 Difference]: Without dead ends: 27523 [2021-05-21 21:27:15,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:27:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-05-21 21:27:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-05-21 21:27:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-05-21 21:27:16,070 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-05-21 21:27:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:16,070 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-05-21 21:27:16,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:27:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-05-21 21:27:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:16,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:16,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:16,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 21:27:16,318 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:16,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:16,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2009638882, now seen corresponding path program 6 times [2021-05-21 21:27:16,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:16,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870762917] [2021-05-21 21:27:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:16,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870762917] [2021-05-21 21:27:16,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870762917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988681497] [2021-05-21 21:27:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:16,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:27:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:27:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988681497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:16,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:16,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:27:16,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125160480] [2021-05-21 21:27:16,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:27:16,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:16,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:27:16,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:27:16,588 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:16,889 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-05-21 21:27:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:27:16,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:16,963 INFO L225 Difference]: With dead ends: 22500 [2021-05-21 21:27:16,963 INFO L226 Difference]: Without dead ends: 22316 [2021-05-21 21:27:16,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:27:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-05-21 21:27:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-05-21 21:27:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-05-21 21:27:17,597 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-05-21 21:27:17,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:17,597 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-05-21 21:27:17,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-05-21 21:27:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:17,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:17,639 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:17,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:27:17,841 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1604748080, now seen corresponding path program 7 times [2021-05-21 21:27:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:17,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373635567] [2021-05-21 21:27:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:17,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:17,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373635567] [2021-05-21 21:27:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373635567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:17,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848500223] [2021-05-21 21:27:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:27:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:27:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848500223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:18,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:18,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-05-21 21:27:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065021679] [2021-05-21 21:27:18,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:27:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:27:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:27:18,115 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:18,817 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-05-21 21:27:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:27:18,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:18,946 INFO L225 Difference]: With dead ends: 37571 [2021-05-21 21:27:18,946 INFO L226 Difference]: Without dead ends: 37406 [2021-05-21 21:27:18,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:27:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-05-21 21:27:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-05-21 21:27:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-05-21 21:27:19,790 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-05-21 21:27:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:19,791 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-05-21 21:27:19,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-05-21 21:27:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:19,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:19,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:20,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:27:20,041 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 544048456, now seen corresponding path program 8 times [2021-05-21 21:27:20,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:20,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666729872] [2021-05-21 21:27:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:20,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:20,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666729872] [2021-05-21 21:27:20,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666729872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:20,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33582561] [2021-05-21 21:27:20,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:20,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:20,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:20,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:27:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:20,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33582561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:20,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:20,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:27:20,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772291168] [2021-05-21 21:27:20,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:27:20,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:27:20,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:27:20,232 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:20,715 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-05-21 21:27:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:27:20,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:20,787 INFO L225 Difference]: With dead ends: 26558 [2021-05-21 21:27:20,787 INFO L226 Difference]: Without dead ends: 26388 [2021-05-21 21:27:20,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:27:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-05-21 21:27:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-05-21 21:27:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-05-21 21:27:21,473 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-05-21 21:27:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:21,473 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-05-21 21:27:21,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-05-21 21:27:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:21,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:21,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:21,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:21,729 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:21,730 INFO L82 PathProgramCache]: Analyzing trace with hash -792544304, now seen corresponding path program 1 times [2021-05-21 21:27:21,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:21,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491733112] [2021-05-21 21:27:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:21,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491733112] [2021-05-21 21:27:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491733112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910212338] [2021-05-21 21:27:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order 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 21:27:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:21,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:21,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910212338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:21,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:21,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 21:27:21,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118503841] [2021-05-21 21:27:21,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:27:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:27:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:27:21,866 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:22,371 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-05-21 21:27:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:27:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:22,450 INFO L225 Difference]: With dead ends: 28634 [2021-05-21 21:27:22,450 INFO L226 Difference]: Without dead ends: 28616 [2021-05-21 21:27:22,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:27:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-05-21 21:27:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-05-21 21:27:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-05-21 21:27:23,157 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-05-21 21:27:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:23,158 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-05-21 21:27:23,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-05-21 21:27:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:23,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:23,209 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:23,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:27:23,410 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash -341810224, now seen corresponding path program 2 times [2021-05-21 21:27:23,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:23,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054750444] [2021-05-21 21:27:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054750444] [2021-05-21 21:27:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054750444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694583534] [2021-05-21 21:27:23,443 INFO L93 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 21:27:23,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694583534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:23,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:23,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 21:27:23,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554666572] [2021-05-21 21:27:23,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:27:23,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:27:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:27:23,560 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 21:27:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:24,070 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-05-21 21:27:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:27:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 25 [2021-05-21 21:27:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:24,167 INFO L225 Difference]: With dead ends: 30645 [2021-05-21 21:27:24,167 INFO L226 Difference]: Without dead ends: 30645 [2021-05-21 21:27:24,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:27:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-05-21 21:27:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-05-21 21:27:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-05-21 21:27:24,896 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-05-21 21:27:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:24,896 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-05-21 21:27:24,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 21:27:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-05-21 21:27:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:24,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:24,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:25,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:27:25,156 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:25,157 INFO L82 PathProgramCache]: Analyzing trace with hash 35028364, now seen corresponding path program 3 times [2021-05-21 21:27:25,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:25,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920925883] [2021-05-21 21:27:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:25,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920925883] [2021-05-21 21:27:25,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920925883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833265126] [2021-05-21 21:27:25,195 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:25,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:27:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:25,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833265126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:27:25,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:27:25,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-05-21 21:27:25,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088681356] [2021-05-21 21:27:25,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:27:25,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:27:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:27:25,300 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:25,650 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-05-21 21:27:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:27:25,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:25,762 INFO L225 Difference]: With dead ends: 33932 [2021-05-21 21:27:25,762 INFO L226 Difference]: Without dead ends: 33850 [2021-05-21 21:27:25,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:27:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-05-21 21:27:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-05-21 21:27:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-05-21 21:27:26,617 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-05-21 21:27:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:26,617 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-05-21 21:27:26,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-05-21 21:27:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:26,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:26,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:26,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:26,874 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-05-21 21:27:26,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:26,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424711035] [2021-05-21 21:27:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:26,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424711035] [2021-05-21 21:27:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424711035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687061697] [2021-05-21 21:27:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:27:26,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:26,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:27:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:27,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687061697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:27,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:27,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:27:27,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265097825] [2021-05-21 21:27:27,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:27,018 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:27,511 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-05-21 21:27:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:27:27,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:27,594 INFO L225 Difference]: With dead ends: 29638 [2021-05-21 21:27:27,595 INFO L226 Difference]: Without dead ends: 29562 [2021-05-21 21:27:27,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-05-21 21:27:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-05-21 21:27:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-05-21 21:27:28,415 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-05-21 21:27:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:28,415 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-05-21 21:27:28,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-05-21 21:27:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:28,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:28,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:28,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 21:27:28,680 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:28,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-05-21 21:27:28,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:28,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794626315] [2021-05-21 21:27:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:28,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:28,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794626315] [2021-05-21 21:27:28,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794626315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:28,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429069051] [2021-05-21 21:27:28,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:27:28,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:27:28,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:27:28,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:28,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429069051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:28,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:28,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:27:28,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670688348] [2021-05-21 21:27:28,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:28,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:28,827 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:29,121 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-05-21 21:27:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:27:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:29,205 INFO L225 Difference]: With dead ends: 29552 [2021-05-21 21:27:29,205 INFO L226 Difference]: Without dead ends: 29476 [2021-05-21 21:27:29,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-05-21 21:27:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-05-21 21:27:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-05-21 21:27:30,037 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-05-21 21:27:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:30,037 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-05-21 21:27:30,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-05-21 21:27:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:30,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:30,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:30,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:30,304 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-05-21 21:27:30,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:30,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904155679] [2021-05-21 21:27:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:30,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:30,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904155679] [2021-05-21 21:27:30,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904155679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:30,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368872582] [2021-05-21 21:27:30,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:27:30,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:27:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:30,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368872582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:30,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:30,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:27:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970665084] [2021-05-21 21:27:30,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:27:30,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:27:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:27:30,460 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:31,398 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-05-21 21:27:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:27:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:31,663 INFO L225 Difference]: With dead ends: 58244 [2021-05-21 21:27:31,663 INFO L226 Difference]: Without dead ends: 58083 [2021-05-21 21:27:31,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:27:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-05-21 21:27:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-05-21 21:27:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-05-21 21:27:32,998 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-05-21 21:27:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:32,998 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-05-21 21:27:32,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-05-21 21:27:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:33,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:33,097 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:33,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 21:27:33,298 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-05-21 21:27:33,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:33,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788725355] [2021-05-21 21:27:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:33,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788725355] [2021-05-21 21:27:33,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788725355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632809638] [2021-05-21 21:27:33,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:33,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:27:33,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:33,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:33,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632809638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:33,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:33,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:27:33,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217181392] [2021-05-21 21:27:33,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:27:33,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:27:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:27:33,419 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:34,633 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-05-21 21:27:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:27:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:34,929 INFO L225 Difference]: With dead ends: 83779 [2021-05-21 21:27:34,929 INFO L226 Difference]: Without dead ends: 83779 [2021-05-21 21:27:34,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:27:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-05-21 21:27:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-05-21 21:27:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-05-21 21:27:37,423 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-05-21 21:27:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:37,423 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-05-21 21:27:37,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-05-21 21:27:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:37,578 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:37,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:37,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 21:27:37,778 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-05-21 21:27:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:37,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707563320] [2021-05-21 21:27:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:37,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707563320] [2021-05-21 21:27:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707563320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716326802] [2021-05-21 21:27:37,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:27:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716326802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:37,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:37,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:27:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460617776] [2021-05-21 21:27:37,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:37,965 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:38,953 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-05-21 21:27:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:27:38,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:39,191 INFO L225 Difference]: With dead ends: 74099 [2021-05-21 21:27:39,192 INFO L226 Difference]: Without dead ends: 74023 [2021-05-21 21:27:39,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-05-21 21:27:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-05-21 21:27:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-05-21 21:27:41,469 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-05-21 21:27:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:41,469 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-05-21 21:27:41,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-05-21 21:27:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:41,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:41,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:41,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 21:27:41,847 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-05-21 21:27:41,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:41,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69517115] [2021-05-21 21:27:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:41,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:41,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69517115] [2021-05-21 21:27:41,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69517115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:41,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523242209] [2021-05-21 21:27:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:27:41,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:27:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:27:42,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523242209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:42,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:42,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:27:42,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767781174] [2021-05-21 21:27:42,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:27:42,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:27:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:42,011 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:42,694 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-05-21 21:27:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:27:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:43,606 INFO L225 Difference]: With dead ends: 73874 [2021-05-21 21:27:43,606 INFO L226 Difference]: Without dead ends: 73798 [2021-05-21 21:27:43,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:27:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-05-21 21:27:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-05-21 21:27:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-05-21 21:27:45,327 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-05-21 21:27:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:45,327 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-05-21 21:27:45,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-05-21 21:27:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:45,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:45,487 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:45,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 21:27:45,687 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:45,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-05-21 21:27:45,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:45,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289031318] [2021-05-21 21:27:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:45,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289031318] [2021-05-21 21:27:45,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289031318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175226904] [2021-05-21 21:27:45,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:27:45,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:27:45,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:45,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:27:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:45,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175226904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:45,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:45,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:27:45,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846505535] [2021-05-21 21:27:45,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:27:45,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:27:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:27:45,809 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:47,202 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-05-21 21:27:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:27:47,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:47,629 INFO L225 Difference]: With dead ends: 113780 [2021-05-21 21:27:47,629 INFO L226 Difference]: Without dead ends: 113660 [2021-05-21 21:27:47,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:27:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-05-21 21:27:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-05-21 21:27:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-05-21 21:27:51,483 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-05-21 21:27:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:27:51,483 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-05-21 21:27:51,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-05-21 21:27:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:27:51,704 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:27:51,704 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:27:51,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:27:51,905 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:27:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:27:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-05-21 21:27:51,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:27:51,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527177130] [2021-05-21 21:27:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:27:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:27:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:51,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:27:51,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527177130] [2021-05-21 21:27:51,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527177130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:51,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662723808] [2021-05-21 21:27:51,959 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 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 21:27:51,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:27:51,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:27:51,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:27:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:27:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:27:52,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662723808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:27:52,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:27:52,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 21:27:52,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015661407] [2021-05-21 21:27:52,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:27:52,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:27:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:27:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:27:52,105 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:27:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:27:54,290 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-05-21 21:27:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:27:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:27:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:27:55,163 INFO L225 Difference]: With dead ends: 199161 [2021-05-21 21:27:55,163 INFO L226 Difference]: Without dead ends: 199068 [2021-05-21 21:27:55,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:27:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-05-21 21:27:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-05-21 21:28:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-05-21 21:28:00,629 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-05-21 21:28:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:00,629 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-05-21 21:28:00,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-05-21 21:28:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:28:00,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:00,878 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:01,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 21:28:01,078 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 193179122, now seen corresponding path program 13 times [2021-05-21 21:28:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:01,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704718501] [2021-05-21 21:28:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:01,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:01,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704718501] [2021-05-21 21:28:01,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704718501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:01,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802403292] [2021-05-21 21:28:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:28:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802403292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:01,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:01,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 21:28:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924966142] [2021-05-21 21:28:01,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:28:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:28:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:28:01,269 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:03,826 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-05-21 21:28:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:28:03,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:28:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:04,913 INFO L225 Difference]: With dead ends: 206475 [2021-05-21 21:28:04,914 INFO L226 Difference]: Without dead ends: 206475 [2021-05-21 21:28:04,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:28:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-05-21 21:28:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-05-21 21:28:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-05-21 21:28:10,873 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-05-21 21:28:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:10,873 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-05-21 21:28:10,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-05-21 21:28:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:28:11,239 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:11,239 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:11,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:11,439 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-05-21 21:28:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:11,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284848877] [2021-05-21 21:28:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:11,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284848877] [2021-05-21 21:28:11,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284848877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949330595] [2021-05-21 21:28:11,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:11,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:28:11,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:28:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:11,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949330595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:11,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:11,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-05-21 21:28:11,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541815105] [2021-05-21 21:28:11,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:28:11,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:28:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:28:11,593 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:13,499 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-05-21 21:28:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:28:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:28:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:14,149 INFO L225 Difference]: With dead ends: 158888 [2021-05-21 21:28:14,149 INFO L226 Difference]: Without dead ends: 158813 [2021-05-21 21:28:14,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:28:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-05-21 21:28:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-05-21 21:28:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-05-21 21:28:19,717 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-05-21 21:28:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:19,717 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-05-21 21:28:19,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-05-21 21:28:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:28:20,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:20,078 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:20,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:20,279 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:20,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-05-21 21:28:20,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:20,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273551604] [2021-05-21 21:28:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:20,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:20,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273551604] [2021-05-21 21:28:20,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273551604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:20,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555195148] [2021-05-21 21:28:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:20,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:28:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:20,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:28:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:20,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555195148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:20,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:20,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-21 21:28:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095305386] [2021-05-21 21:28:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:28:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:28:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:28:20,498 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 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 21:28:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:23,815 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-05-21 21:28:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:28:23,816 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 25 [2021-05-21 21:28:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:25,888 INFO L225 Difference]: With dead ends: 274279 [2021-05-21 21:28:25,888 INFO L226 Difference]: Without dead ends: 274261 [2021-05-21 21:28:25,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:28:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-05-21 21:28:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-05-21 21:28:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-05-21 21:28:31,938 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-05-21 21:28:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:31,939 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-05-21 21:28:31,939 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 21:28:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-05-21 21:28:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:28:32,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:32,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:32,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 21:28:32,548 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 681395814, now seen corresponding path program 16 times [2021-05-21 21:28:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:32,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355864070] [2021-05-21 21:28:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:32,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355864070] [2021-05-21 21:28:32,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355864070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330143574] [2021-05-21 21:28:32,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 21:28:32,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:28:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:28:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:32,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330143574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:32,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:32,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-21 21:28:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771040864] [2021-05-21 21:28:32,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:28:32,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:28:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:28:32,747 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:35,026 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-05-21 21:28:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:28:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:28:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:36,003 INFO L225 Difference]: With dead ends: 228605 [2021-05-21 21:28:36,003 INFO L226 Difference]: Without dead ends: 228605 [2021-05-21 21:28:36,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:28:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-05-21 21:28:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-05-21 21:28:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-05-21 21:28:41,767 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-05-21 21:28:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:41,767 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-05-21 21:28:41,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-05-21 21:28:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:28:42,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:42,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:42,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:28:42,280 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:42,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-05-21 21:28:42,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:42,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353957837] [2021-05-21 21:28:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:42,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353957837] [2021-05-21 21:28:42,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353957837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888589411] [2021-05-21 21:28:42,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:28:42,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:28:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:28:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888589411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:42,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:42,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 21:28:42,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992938724] [2021-05-21 21:28:42,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:28:42,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:28:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:28:42,476 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:44,538 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-05-21 21:28:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:28:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:28:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:45,810 INFO L225 Difference]: With dead ends: 181963 [2021-05-21 21:28:45,810 INFO L226 Difference]: Without dead ends: 181963 [2021-05-21 21:28:45,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:28:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-05-21 21:28:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-05-21 21:28:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-05-21 21:28:51,015 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-05-21 21:28:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:28:51,015 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-05-21 21:28:51,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:28:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-05-21 21:28:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:28:51,325 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:28:51,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:28:51,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 21:28:51,530 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:28:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:28:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-05-21 21:28:51,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:28:51,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063454384] [2021-05-21 21:28:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:28:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:28:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:51,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:28:51,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063454384] [2021-05-21 21:28:51,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063454384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:51,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554481962] [2021-05-21 21:28:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:28:51,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:28:51,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:28:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:28:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:28:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:28:51,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554481962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:28:51,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:28:51,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-05-21 21:28:51,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375332944] [2021-05-21 21:28:51,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:28:51,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:28:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:28:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:28:51,705 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 21:28:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:28:53,642 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-05-21 21:28:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:28:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 25 [2021-05-21 21:28:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:28:55,013 INFO L225 Difference]: With dead ends: 192198 [2021-05-21 21:28:55,013 INFO L226 Difference]: Without dead ends: 192052 [2021-05-21 21:28:55,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:28:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-05-21 21:28:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-05-21 21:28:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-05-21 21:29:00,239 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-05-21 21:29:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:00,239 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-05-21 21:29:00,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 21:29:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-05-21 21:29:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:00,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:00,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:00,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:00,758 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-05-21 21:29:00,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:00,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172383548] [2021-05-21 21:29:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:00,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:00,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172383548] [2021-05-21 21:29:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172383548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:00,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395910301] [2021-05-21 21:29:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:29:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:29:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:00,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395910301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:00,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:00,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-05-21 21:29:00,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091098266] [2021-05-21 21:29:00,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:29:00,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:29:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:29:00,898 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:02,658 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-05-21 21:29:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:29:02,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:29:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:03,252 INFO L225 Difference]: With dead ends: 151664 [2021-05-21 21:29:03,252 INFO L226 Difference]: Without dead ends: 151407 [2021-05-21 21:29:03,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:29:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-05-21 21:29:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-05-21 21:29:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-05-21 21:29:07,940 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-05-21 21:29:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:07,940 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-05-21 21:29:07,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-05-21 21:29:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:09,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:09,056 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:09,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 21:29:09,273 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-05-21 21:29:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:09,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717666576] [2021-05-21 21:29:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:09,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:09,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717666576] [2021-05-21 21:29:09,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717666576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:09,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566909421] [2021-05-21 21:29:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 21:29:09,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:29:09,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:09,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:29:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:09,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566909421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:09,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:09,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-21 21:29:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677102149] [2021-05-21 21:29:09,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:29:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:09,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:29:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:29:09,466 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:29:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:11,395 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-05-21 21:29:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:29:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-05-21 21:29:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:12,120 INFO L225 Difference]: With dead ends: 193192 [2021-05-21 21:29:12,121 INFO L226 Difference]: Without dead ends: 193064 [2021-05-21 21:29:12,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:29:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-05-21 21:29:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-05-21 21:29:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-05-21 21:29:17,011 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-05-21 21:29:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:17,011 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-05-21 21:29:17,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:29:17,012 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-05-21 21:29:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:18,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:18,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:18,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-21 21:29:18,259 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-05-21 21:29:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:18,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650748697] [2021-05-21 21:29:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:18,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:18,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650748697] [2021-05-21 21:29:18,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650748697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:18,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791739126] [2021-05-21 21:29:18,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:18,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:29:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:29:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:18,371 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 21:29:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791739126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:18,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:18,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:29:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316793854] [2021-05-21 21:29:18,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:29:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:29:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:29:18,373 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 21:29:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:20,014 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-05-21 21:29:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:29:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 25 [2021-05-21 21:29:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:20,958 INFO L225 Difference]: With dead ends: 156612 [2021-05-21 21:29:20,958 INFO L226 Difference]: Without dead ends: 156525 [2021-05-21 21:29:20,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:29:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-05-21 21:29:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-05-21 21:29:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-05-21 21:29:25,875 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-05-21 21:29:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:25,875 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-05-21 21:29:25,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 21:29:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-05-21 21:29:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:27,049 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:27,050 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:27,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:27,253 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-05-21 21:29:27,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:27,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893156433] [2021-05-21 21:29:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:27,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893156433] [2021-05-21 21:29:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893156433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679278358] [2021-05-21 21:29:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:27,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:29:27,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:27,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:29:27,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:27,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679278358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:27,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:27,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:29:27,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121023612] [2021-05-21 21:29:27,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:29:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:27,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:29:27,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:29:27,397 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:28,430 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-05-21 21:29:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:29:28,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:29:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:29,707 INFO L225 Difference]: With dead ends: 156333 [2021-05-21 21:29:29,708 INFO L226 Difference]: Without dead ends: 156315 [2021-05-21 21:29:29,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:29:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-05-21 21:29:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-05-21 21:29:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-05-21 21:29:34,523 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-05-21 21:29:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:34,523 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-05-21 21:29:34,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-05-21 21:29:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:34,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:34,869 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:35,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-21 21:29:35,073 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-05-21 21:29:35,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:35,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510369522] [2021-05-21 21:29:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:35,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:35,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510369522] [2021-05-21 21:29:35,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510369522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:35,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639149061] [2021-05-21 21:29:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:29:35,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:29:35,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:35,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:29:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639149061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:29:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800347137] [2021-05-21 21:29:35,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:29:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:29:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:29:35,217 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 21:29:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:37,131 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-05-21 21:29:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:29:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 25 [2021-05-21 21:29:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:37,821 INFO L225 Difference]: With dead ends: 161541 [2021-05-21 21:29:37,821 INFO L226 Difference]: Without dead ends: 161541 [2021-05-21 21:29:37,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:29:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-05-21 21:29:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-05-21 21:29:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-05-21 21:29:43,177 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-05-21 21:29:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:43,177 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-05-21 21:29:43,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 21:29:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-05-21 21:29:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:43,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:43,584 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:43,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:43,789 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-05-21 21:29:43,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:43,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858843708] [2021-05-21 21:29:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:43,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:43,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858843708] [2021-05-21 21:29:43,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858843708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:43,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116973359] [2021-05-21 21:29:43,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:43,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:29:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:29:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:29:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:43,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116973359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:43,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:43,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:29:43,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737447892] [2021-05-21 21:29:43,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:29:43,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:43,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:29:43,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:29:43,909 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:45,649 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-05-21 21:29:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:29:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:29:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:46,274 INFO L225 Difference]: With dead ends: 156029 [2021-05-21 21:29:46,274 INFO L226 Difference]: Without dead ends: 156011 [2021-05-21 21:29:46,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:29:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-05-21 21:29:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-05-21 21:29:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-05-21 21:29:51,039 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-05-21 21:29:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:51,039 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-05-21 21:29:51,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-05-21 21:29:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:29:51,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:29:51,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:29:51,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 21:29:51,551 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:29:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:29:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-05-21 21:29:51,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:29:51,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702186444] [2021-05-21 21:29:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:29:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:51,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:29:51,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702186444] [2021-05-21 21:29:51,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702186444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:51,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179873293] [2021-05-21 21:29:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:29:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:29:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:29:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:29:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:29:51,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179873293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:29:51,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:29:51,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:29:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634536812] [2021-05-21 21:29:51,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:29:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:29:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:29:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:29:51,691 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:29:53,615 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-05-21 21:29:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:29:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:29:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:29:54,953 INFO L225 Difference]: With dead ends: 187205 [2021-05-21 21:29:54,953 INFO L226 Difference]: Without dead ends: 187205 [2021-05-21 21:29:54,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:29:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-05-21 21:29:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-05-21 21:29:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-05-21 21:29:59,869 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-05-21 21:29:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:29:59,869 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-05-21 21:29:59,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:29:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-05-21 21:30:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:30:00,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:00,180 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:30:00,387 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-05-21 21:30:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:00,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904613305] [2021-05-21 21:30:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:00,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:00,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904613305] [2021-05-21 21:30:00,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904613305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:00,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898107015] [2021-05-21 21:30:00,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 21:30:00,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:30:00,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:30:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:30:00,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:30:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:00,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898107015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:00,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:00,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:30:00,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232467382] [2021-05-21 21:30:00,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:30:00,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:30:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:30:00,588 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:02,324 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-05-21 21:30:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:30:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:30:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:02,933 INFO L225 Difference]: With dead ends: 153348 [2021-05-21 21:30:02,933 INFO L226 Difference]: Without dead ends: 153248 [2021-05-21 21:30:02,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:30:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-05-21 21:30:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-05-21 21:30:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-05-21 21:30:08,501 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-05-21 21:30:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:30:08,501 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-05-21 21:30:08,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-05-21 21:30:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:30:08,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:08,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:09,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:30:09,099 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:09,099 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-05-21 21:30:09,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:09,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689893841] [2021-05-21 21:30:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:09,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:09,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689893841] [2021-05-21 21:30:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689893841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:09,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052776426] [2021-05-21 21:30:09,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:30:09,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:30:09,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:30:09,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:30:09,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:30:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:09,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052776426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:09,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:09,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:30:09,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534485075] [2021-05-21 21:30:09,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:30:09,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:30:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:30:09,248 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:12,296 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-05-21 21:30:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:30:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:30:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:14,015 INFO L225 Difference]: With dead ends: 254992 [2021-05-21 21:30:14,016 INFO L226 Difference]: Without dead ends: 254992 [2021-05-21 21:30:14,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:30:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-05-21 21:30:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-05-21 21:30:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-05-21 21:30:21,399 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-05-21 21:30:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:30:21,400 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-05-21 21:30:21,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-05-21 21:30:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:30:21,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:21,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:22,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:30:22,021 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-05-21 21:30:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:22,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111860859] [2021-05-21 21:30:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:22,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111860859] [2021-05-21 21:30:22,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111860859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:22,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837655062] [2021-05-21 21:30:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:22,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:30:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:30:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:30:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:30:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:22,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837655062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:22,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:22,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:30:22,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037152448] [2021-05-21 21:30:22,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:30:22,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:30:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:30:22,166 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:24,393 INFO L93 Difference]: Finished difference Result 216803 states and 978719 transitions. [2021-05-21 21:30:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:30:24,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:30:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:25,318 INFO L225 Difference]: With dead ends: 216803 [2021-05-21 21:30:25,318 INFO L226 Difference]: Without dead ends: 216803 [2021-05-21 21:30:25,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:30:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216803 states. [2021-05-21 21:30:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216803 to 169071. [2021-05-21 21:30:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169071 states, 169070 states have (on average 4.613083338262258) internal successors, (779934), 169070 states have internal predecessors, (779934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169071 states to 169071 states and 779934 transitions. [2021-05-21 21:30:31,675 INFO L78 Accepts]: Start accepts. Automaton has 169071 states and 779934 transitions. Word has length 25 [2021-05-21 21:30:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:30:31,675 INFO L482 AbstractCegarLoop]: Abstraction has 169071 states and 779934 transitions. [2021-05-21 21:30:31,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 169071 states and 779934 transitions. [2021-05-21 21:30:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:30:32,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:32,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:33,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:30:33,109 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 11 times [2021-05-21 21:30:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:33,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151110778] [2021-05-21 21:30:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:33,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:33,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151110778] [2021-05-21 21:30:33,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151110778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:33,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378124341] [2021-05-21 21:30:33,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:30:33,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:30:33,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:30:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:30:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:30:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:33,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378124341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:33,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:33,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 21:30:33,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901964264] [2021-05-21 21:30:33,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:30:33,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:33,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:30:33,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:30:33,396 INFO L87 Difference]: Start difference. First operand 169071 states and 779934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:35,301 INFO L93 Difference]: Finished difference Result 190564 states and 868690 transitions. [2021-05-21 21:30:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:30:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:30:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:36,103 INFO L225 Difference]: With dead ends: 190564 [2021-05-21 21:30:36,103 INFO L226 Difference]: Without dead ends: 190336 [2021-05-21 21:30:36,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:30:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190336 states. [2021-05-21 21:30:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190336 to 169413. [2021-05-21 21:30:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169413 states, 169412 states have (on average 4.612908176516422) internal successors, (781482), 169412 states have internal predecessors, (781482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169413 states to 169413 states and 781482 transitions. [2021-05-21 21:30:42,214 INFO L78 Accepts]: Start accepts. Automaton has 169413 states and 781482 transitions. Word has length 25 [2021-05-21 21:30:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:30:42,215 INFO L482 AbstractCegarLoop]: Abstraction has 169413 states and 781482 transitions. [2021-05-21 21:30:42,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 169413 states and 781482 transitions. [2021-05-21 21:30:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:30:42,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:42,616 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:42,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 21:30:42,818 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 12 times [2021-05-21 21:30:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:42,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853514210] [2021-05-21 21:30:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:42,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853514210] [2021-05-21 21:30:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853514210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727940679] [2021-05-21 21:30:42,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:42,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:30:42,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:30:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:30:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:30:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:43,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727940679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:43,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:43,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:30:43,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164276720] [2021-05-21 21:30:43,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:30:43,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:43,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:30:43,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:30:43,010 INFO L87 Difference]: Start difference. First operand 169413 states and 781482 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:30:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:46,007 INFO L93 Difference]: Finished difference Result 262079 states and 1183330 transitions. [2021-05-21 21:30:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:30:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 25 [2021-05-21 21:30:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:47,255 INFO L225 Difference]: With dead ends: 262079 [2021-05-21 21:30:47,255 INFO L226 Difference]: Without dead ends: 262061 [2021-05-21 21:30:47,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:30:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262061 states. [2021-05-21 21:30:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262061 to 170992. [2021-05-21 21:30:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170992 states, 170991 states have (on average 4.612985478767889) internal successors, (788779), 170991 states have internal predecessors, (788779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170992 states to 170992 states and 788779 transitions. [2021-05-21 21:30:54,060 INFO L78 Accepts]: Start accepts. Automaton has 170992 states and 788779 transitions. Word has length 25 [2021-05-21 21:30:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:30:54,060 INFO L482 AbstractCegarLoop]: Abstraction has 170992 states and 788779 transitions. [2021-05-21 21:30:54,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:30:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 170992 states and 788779 transitions. [2021-05-21 21:30:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:30:55,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:30:55,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:30:55,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:30:55,475 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:30:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:30:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 13 times [2021-05-21 21:30:55,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:30:55,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135546158] [2021-05-21 21:30:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:30:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:55,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:30:55,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135546158] [2021-05-21 21:30:55,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135546158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:55,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617462594] [2021-05-21 21:30:55,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:30:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:30:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:30:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:30:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:30:55,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617462594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:30:55,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:30:55,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:30:55,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336432296] [2021-05-21 21:30:55,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:30:55,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:30:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:30:55,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:30:55,608 INFO L87 Difference]: Start difference. First operand 170992 states and 788779 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:30:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:30:57,750 INFO L93 Difference]: Finished difference Result 223330 states and 1021133 transitions. [2021-05-21 21:30:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:30:57,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:30:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:30:58,694 INFO L225 Difference]: With dead ends: 223330 [2021-05-21 21:30:58,694 INFO L226 Difference]: Without dead ends: 223330 [2021-05-21 21:30:58,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:30:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223330 states. [2021-05-21 21:31:03,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223330 to 171112. [2021-05-21 21:31:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171112 states, 171111 states have (on average 4.612830268071603) internal successors, (789306), 171111 states have internal predecessors, (789306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171112 states to 171112 states and 789306 transitions. [2021-05-21 21:31:05,043 INFO L78 Accepts]: Start accepts. Automaton has 171112 states and 789306 transitions. Word has length 25 [2021-05-21 21:31:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:31:05,043 INFO L482 AbstractCegarLoop]: Abstraction has 171112 states and 789306 transitions. [2021-05-21 21:31:05,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 171112 states and 789306 transitions. [2021-05-21 21:31:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:31:05,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:31:05,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:31:05,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-21 21:31:05,605 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:31:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:31:05,606 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 14 times [2021-05-21 21:31:05,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:31:05,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628273893] [2021-05-21 21:31:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:31:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:31:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:05,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:31:05,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628273893] [2021-05-21 21:31:05,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628273893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:05,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535011025] [2021-05-21 21:31:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 21:31:05,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:31:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:31:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:31:05,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:31:06,524 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-21 21:31:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:06,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535011025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:06,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:31:06,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:31:06,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96780647] [2021-05-21 21:31:06,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:31:06,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:31:06,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:31:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:31:06,543 INFO L87 Difference]: Start difference. First operand 171112 states and 789306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:31:08,908 INFO L93 Difference]: Finished difference Result 271293 states and 1227721 transitions. [2021-05-21 21:31:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:31:08,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:31:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:31:11,396 INFO L225 Difference]: With dead ends: 271293 [2021-05-21 21:31:11,396 INFO L226 Difference]: Without dead ends: 271293 [2021-05-21 21:31:11,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:31:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271293 states. [2021-05-21 21:31:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271293 to 180348. [2021-05-21 21:31:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180348 states, 180347 states have (on average 4.606841256023111) internal successors, (830830), 180347 states have internal predecessors, (830830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180348 states to 180348 states and 830830 transitions. [2021-05-21 21:31:18,750 INFO L78 Accepts]: Start accepts. Automaton has 180348 states and 830830 transitions. Word has length 25 [2021-05-21 21:31:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:31:18,751 INFO L482 AbstractCegarLoop]: Abstraction has 180348 states and 830830 transitions. [2021-05-21 21:31:18,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 180348 states and 830830 transitions. [2021-05-21 21:31:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:31:20,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:31:20,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:31:20,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:31:20,253 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:31:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:31:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 15 times [2021-05-21 21:31:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:31:20,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985274717] [2021-05-21 21:31:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:31:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:31:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:20,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:31:20,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985274717] [2021-05-21 21:31:20,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985274717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:20,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350409803] [2021-05-21 21:31:20,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:31:20,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:31:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:31:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:31:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:31:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:20,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350409803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:20,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:31:20,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:31:20,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23567209] [2021-05-21 21:31:20,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:31:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:31:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:31:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:31:20,420 INFO L87 Difference]: Start difference. First operand 180348 states and 830830 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:31:22,639 INFO L93 Difference]: Finished difference Result 228294 states and 1029691 transitions. [2021-05-21 21:31:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:31:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:31:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:31:23,555 INFO L225 Difference]: With dead ends: 228294 [2021-05-21 21:31:23,555 INFO L226 Difference]: Without dead ends: 228294 [2021-05-21 21:31:23,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:31:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228294 states. [2021-05-21 21:31:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228294 to 181280. [2021-05-21 21:31:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181280 states, 181279 states have (on average 4.603886826383641) internal successors, (834588), 181279 states have internal predecessors, (834588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181280 states to 181280 states and 834588 transitions. [2021-05-21 21:31:30,656 INFO L78 Accepts]: Start accepts. Automaton has 181280 states and 834588 transitions. Word has length 25 [2021-05-21 21:31:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:31:30,656 INFO L482 AbstractCegarLoop]: Abstraction has 181280 states and 834588 transitions. [2021-05-21 21:31:30,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 181280 states and 834588 transitions. [2021-05-21 21:31:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:31:31,106 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:31:31,106 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:31:31,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 21:31:31,306 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:31:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:31:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 16 times [2021-05-21 21:31:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:31:31,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915639887] [2021-05-21 21:31:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:31:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:31:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:31,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:31:31,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915639887] [2021-05-21 21:31:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915639887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:31,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980004222] [2021-05-21 21:31:31,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:31:31,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:31:31,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:31:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:31:31,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:31:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:31,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980004222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:31,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:31:31,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:31:31,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999605915] [2021-05-21 21:31:31,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:31:31,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:31:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:31:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:31:31,515 INFO L87 Difference]: Start difference. First operand 181280 states and 834588 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:31:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:31:33,670 INFO L93 Difference]: Finished difference Result 206101 states and 938235 transitions. [2021-05-21 21:31:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:31:33,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 25 [2021-05-21 21:31:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:31:34,501 INFO L225 Difference]: With dead ends: 206101 [2021-05-21 21:31:34,501 INFO L226 Difference]: Without dead ends: 205937 [2021-05-21 21:31:34,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:31:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205937 states. [2021-05-21 21:31:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205937 to 181308. [2021-05-21 21:31:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603799081116559) internal successors, (834701), 181307 states have internal predecessors, (834701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834701 transitions. [2021-05-21 21:31:40,578 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834701 transitions. Word has length 25 [2021-05-21 21:31:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:31:40,578 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834701 transitions. [2021-05-21 21:31:40,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:31:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834701 transitions. [2021-05-21 21:31:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:31:41,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:31:41,808 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:31:42,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 21:31:42,009 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:31:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:31:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 17 times [2021-05-21 21:31:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:31:42,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079911906] [2021-05-21 21:31:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:31:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:31:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:42,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:31:42,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079911906] [2021-05-21 21:31:42,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079911906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:42,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873264308] [2021-05-21 21:31:42,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 21:31:42,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:31:42,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:31:42,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:31:42,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:31:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:31:42,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873264308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:42,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:31:42,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:31:42,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374352887] [2021-05-21 21:31:42,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:31:42,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:31:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:31:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:31:42,168 INFO L87 Difference]: Start difference. First operand 181308 states and 834701 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:31:43,959 INFO L93 Difference]: Finished difference Result 182017 states and 837141 transitions. [2021-05-21 21:31:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:31:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:31:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:31:44,670 INFO L225 Difference]: With dead ends: 182017 [2021-05-21 21:31:44,671 INFO L226 Difference]: Without dead ends: 181917 [2021-05-21 21:31:44,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:31:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181917 states. [2021-05-21 21:31:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181917 to 181308. [2021-05-21 21:31:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603650162431677) internal successors, (834674), 181307 states have internal predecessors, (834674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834674 transitions. [2021-05-21 21:31:50,605 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834674 transitions. Word has length 25 [2021-05-21 21:31:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:31:50,605 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834674 transitions. [2021-05-21 21:31:50,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834674 transitions. [2021-05-21 21:31:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:31:51,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:31:51,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:31:51,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-21 21:31:51,224 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:31:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:31:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -59787534, now seen corresponding path program 7 times [2021-05-21 21:31:51,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:31:51,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804488167] [2021-05-21 21:31:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:31:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:31:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:31:51,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:31:51,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804488167] [2021-05-21 21:31:51,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804488167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:31:51,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:31:51,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:31:51,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532888031] [2021-05-21 21:31:51,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:31:51,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:31:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:31:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:31:51,241 INFO L87 Difference]: Start difference. First operand 181308 states and 834674 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:31:53,183 INFO L93 Difference]: Finished difference Result 198214 states and 888498 transitions. [2021-05-21 21:31:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:31:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:31:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:31:53,845 INFO L225 Difference]: With dead ends: 198214 [2021-05-21 21:31:53,845 INFO L226 Difference]: Without dead ends: 164346 [2021-05-21 21:31:53,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:31:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164346 states. [2021-05-21 21:31:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164346 to 125085. [2021-05-21 21:31:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125085 states, 125084 states have (on average 4.721331265389658) internal successors, (590563), 125084 states have internal predecessors, (590563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125085 states to 125085 states and 590563 transitions. [2021-05-21 21:31:58,235 INFO L78 Accepts]: Start accepts. Automaton has 125085 states and 590563 transitions. Word has length 25 [2021-05-21 21:31:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:31:58,235 INFO L482 AbstractCegarLoop]: Abstraction has 125085 states and 590563 transitions. [2021-05-21 21:31:58,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:31:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 125085 states and 590563 transitions. [2021-05-21 21:31:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:31:59,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:31:59,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:31:59,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-21 21:31:59,301 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:31:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:31:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1733798960, now seen corresponding path program 8 times [2021-05-21 21:31:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:31:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54850436] [2021-05-21 21:31:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:31:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:31:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:31:59,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:31:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54850436] [2021-05-21 21:31:59,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54850436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:31:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484066710] [2021-05-21 21:31:59,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:31:59,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:31:59,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:31:59,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:31:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:31:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:31:59,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484066710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:31:59,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:31:59,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-05-21 21:31:59,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453265392] [2021-05-21 21:31:59,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:31:59,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:31:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:31:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:31:59,387 INFO L87 Difference]: Start difference. First operand 125085 states and 590563 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:00,214 INFO L93 Difference]: Finished difference Result 130126 states and 607352 transitions. [2021-05-21 21:32:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:32:00,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:01,603 INFO L225 Difference]: With dead ends: 130126 [2021-05-21 21:32:01,603 INFO L226 Difference]: Without dead ends: 127575 [2021-05-21 21:32:01,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:32:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127575 states. [2021-05-21 21:32:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127575 to 87700. [2021-05-21 21:32:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87700 states, 87699 states have (on average 4.690794649881982) internal successors, (411378), 87699 states have internal predecessors, (411378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87700 states to 87700 states and 411378 transitions. [2021-05-21 21:32:04,615 INFO L78 Accepts]: Start accepts. Automaton has 87700 states and 411378 transitions. Word has length 25 [2021-05-21 21:32:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:04,615 INFO L482 AbstractCegarLoop]: Abstraction has 87700 states and 411378 transitions. [2021-05-21 21:32:04,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 87700 states and 411378 transitions. [2021-05-21 21:32:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:05,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:05,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:05,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-21 21:32:05,557 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-05-21 21:32:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:05,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567661998] [2021-05-21 21:32:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:05,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:05,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567661998] [2021-05-21 21:32:05,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567661998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:05,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343003116] [2021-05-21 21:32:05,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:32:05,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:32:05,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:05,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343003116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:05,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:05,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:05,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915620853] [2021-05-21 21:32:05,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:05,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:05,714 INFO L87 Difference]: Start difference. First operand 87700 states and 411378 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:06,482 INFO L93 Difference]: Finished difference Result 89555 states and 418507 transitions. [2021-05-21 21:32:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:06,811 INFO L225 Difference]: With dead ends: 89555 [2021-05-21 21:32:06,811 INFO L226 Difference]: Without dead ends: 89419 [2021-05-21 21:32:06,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-05-21 21:32:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 87693. [2021-05-21 21:32:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87693 states, 87692 states have (on average 4.691762076358162) internal successors, (411430), 87692 states have internal predecessors, (411430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87693 states to 87693 states and 411430 transitions. [2021-05-21 21:32:09,588 INFO L78 Accepts]: Start accepts. Automaton has 87693 states and 411430 transitions. Word has length 25 [2021-05-21 21:32:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:09,588 INFO L482 AbstractCegarLoop]: Abstraction has 87693 states and 411430 transitions. [2021-05-21 21:32:09,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 87693 states and 411430 transitions. [2021-05-21 21:32:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:09,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:09,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:09,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:09,985 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-05-21 21:32:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:09,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419236137] [2021-05-21 21:32:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:10,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:10,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419236137] [2021-05-21 21:32:10,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419236137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:10,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125822045] [2021-05-21 21:32:10,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 21:32:10,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:32:10,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:10,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125822045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:10,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:10,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:10,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633311401] [2021-05-21 21:32:10,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:10,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:10,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:10,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:10,119 INFO L87 Difference]: Start difference. First operand 87693 states and 411430 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:11,267 INFO L93 Difference]: Finished difference Result 89703 states and 419257 transitions. [2021-05-21 21:32:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:11,611 INFO L225 Difference]: With dead ends: 89703 [2021-05-21 21:32:11,611 INFO L226 Difference]: Without dead ends: 89567 [2021-05-21 21:32:11,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89567 states. [2021-05-21 21:32:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89567 to 87714. [2021-05-21 21:32:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87714 states, 87713 states have (on average 4.692006886094422) internal successors, (411550), 87713 states have internal predecessors, (411550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87714 states to 87714 states and 411550 transitions. [2021-05-21 21:32:13,752 INFO L78 Accepts]: Start accepts. Automaton has 87714 states and 411550 transitions. Word has length 25 [2021-05-21 21:32:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:13,752 INFO L482 AbstractCegarLoop]: Abstraction has 87714 states and 411550 transitions. [2021-05-21 21:32:13,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 87714 states and 411550 transitions. [2021-05-21 21:32:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:14,472 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:14,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:14,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:14,689 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-05-21 21:32:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:14,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241213240] [2021-05-21 21:32:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:14,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:14,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241213240] [2021-05-21 21:32:14,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241213240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:14,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711331614] [2021-05-21 21:32:14,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:14,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:32:14,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711331614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:14,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:14,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:14,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572388046] [2021-05-21 21:32:14,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:14,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:14,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:14,834 INFO L87 Difference]: Start difference. First operand 87714 states and 411550 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:15,451 INFO L93 Difference]: Finished difference Result 89056 states and 416830 transitions. [2021-05-21 21:32:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:15,758 INFO L225 Difference]: With dead ends: 89056 [2021-05-21 21:32:15,758 INFO L226 Difference]: Without dead ends: 88940 [2021-05-21 21:32:15,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88940 states. [2021-05-21 21:32:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88940 to 87736. [2021-05-21 21:32:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87736 states, 87735 states have (on average 4.692141106741893) internal successors, (411665), 87735 states have internal predecessors, (411665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87736 states to 87736 states and 411665 transitions. [2021-05-21 21:32:18,420 INFO L78 Accepts]: Start accepts. Automaton has 87736 states and 411665 transitions. Word has length 25 [2021-05-21 21:32:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:18,420 INFO L482 AbstractCegarLoop]: Abstraction has 87736 states and 411665 transitions. [2021-05-21 21:32:18,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 87736 states and 411665 transitions. [2021-05-21 21:32:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:18,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:18,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:18,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 21:32:18,810 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-05-21 21:32:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:18,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897281086] [2021-05-21 21:32:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:18,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897281086] [2021-05-21 21:32:18,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897281086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705037916] [2021-05-21 21:32:18,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:32:18,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:32:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:18,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705037916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:18,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:18,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:18,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412919671] [2021-05-21 21:32:18,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:18,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:18,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:18,974 INFO L87 Difference]: Start difference. First operand 87736 states and 411665 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:20,164 INFO L93 Difference]: Finished difference Result 88944 states and 416367 transitions. [2021-05-21 21:32:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:20,459 INFO L225 Difference]: With dead ends: 88944 [2021-05-21 21:32:20,459 INFO L226 Difference]: Without dead ends: 88848 [2021-05-21 21:32:20,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88848 states. [2021-05-21 21:32:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88848 to 87758. [2021-05-21 21:32:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87758 states, 87757 states have (on average 4.692412001321832) internal successors, (411792), 87757 states have internal predecessors, (411792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 411792 transitions. [2021-05-21 21:32:23,117 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 411792 transitions. Word has length 25 [2021-05-21 21:32:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:23,117 INFO L482 AbstractCegarLoop]: Abstraction has 87758 states and 411792 transitions. [2021-05-21 21:32:23,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 411792 transitions. [2021-05-21 21:32:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:23,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:23,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:23,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 21:32:23,517 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-05-21 21:32:23,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:23,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115295262] [2021-05-21 21:32:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:23,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115295262] [2021-05-21 21:32:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115295262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897753048] [2021-05-21 21:32:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:32:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897753048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:23,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:23,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527955281] [2021-05-21 21:32:23,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:23,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:23,644 INFO L87 Difference]: Start difference. First operand 87758 states and 411792 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:24,262 INFO L93 Difference]: Finished difference Result 90259 states and 421196 transitions. [2021-05-21 21:32:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:24,564 INFO L225 Difference]: With dead ends: 90259 [2021-05-21 21:32:24,564 INFO L226 Difference]: Without dead ends: 90123 [2021-05-21 21:32:24,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90123 states. [2021-05-21 21:32:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90123 to 87809. [2021-05-21 21:32:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 4.692852587463557) internal successors, (412070), 87808 states have internal predecessors, (412070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 412070 transitions. [2021-05-21 21:32:27,130 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 412070 transitions. Word has length 25 [2021-05-21 21:32:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:27,130 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 412070 transitions. [2021-05-21 21:32:27,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 412070 transitions. [2021-05-21 21:32:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:27,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:27,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:27,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 21:32:27,519 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-05-21 21:32:27,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:27,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614834870] [2021-05-21 21:32:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:27,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614834870] [2021-05-21 21:32:27,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614834870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597765539] [2021-05-21 21:32:27,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:32:27,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:32:27,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:27,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:27,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:27,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597765539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:27,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:27,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860978950] [2021-05-21 21:32:27,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:27,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:27,685 INFO L87 Difference]: Start difference. First operand 87809 states and 412070 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:28,802 INFO L93 Difference]: Finished difference Result 89754 states and 419470 transitions. [2021-05-21 21:32:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:29,099 INFO L225 Difference]: With dead ends: 89754 [2021-05-21 21:32:29,100 INFO L226 Difference]: Without dead ends: 89638 [2021-05-21 21:32:29,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89638 states. [2021-05-21 21:32:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89638 to 87839. [2021-05-21 21:32:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87839 states, 87838 states have (on average 4.693196566406339) internal successors, (412241), 87838 states have internal predecessors, (412241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87839 states to 87839 states and 412241 transitions. [2021-05-21 21:32:31,792 INFO L78 Accepts]: Start accepts. Automaton has 87839 states and 412241 transitions. Word has length 25 [2021-05-21 21:32:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:31,792 INFO L482 AbstractCegarLoop]: Abstraction has 87839 states and 412241 transitions. [2021-05-21 21:32:31,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87839 states and 412241 transitions. [2021-05-21 21:32:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:31,974 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:31,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:32,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 21:32:32,175 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:32,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-05-21 21:32:32,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:32,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086340408] [2021-05-21 21:32:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:32,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:32,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086340408] [2021-05-21 21:32:32,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086340408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:32,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954211885] [2021-05-21 21:32:32,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:32,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:32:32,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:32,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:32,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:32,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954211885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:32,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:32,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:32,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359901569] [2021-05-21 21:32:32,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:32,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:32,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:32,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:32,336 INFO L87 Difference]: Start difference. First operand 87839 states and 412241 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:32,986 INFO L93 Difference]: Finished difference Result 89966 states and 420506 transitions. [2021-05-21 21:32:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:33,916 INFO L225 Difference]: With dead ends: 89966 [2021-05-21 21:32:33,916 INFO L226 Difference]: Without dead ends: 89870 [2021-05-21 21:32:33,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89870 states. [2021-05-21 21:32:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89870 to 87873. [2021-05-21 21:32:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87873 states, 87872 states have (on average 4.6936453022578295) internal successors, (412440), 87872 states have internal predecessors, (412440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87873 states to 87873 states and 412440 transitions. [2021-05-21 21:32:35,987 INFO L78 Accepts]: Start accepts. Automaton has 87873 states and 412440 transitions. Word has length 25 [2021-05-21 21:32:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:35,987 INFO L482 AbstractCegarLoop]: Abstraction has 87873 states and 412440 transitions. [2021-05-21 21:32:35,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 87873 states and 412440 transitions. [2021-05-21 21:32:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:36,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:36,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:36,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-21 21:32:36,376 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash 523034708, now seen corresponding path program 9 times [2021-05-21 21:32:36,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:36,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116163759] [2021-05-21 21:32:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:36,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:36,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116163759] [2021-05-21 21:32:36,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116163759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:36,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703249006] [2021-05-21 21:32:36,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:32:36,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:32:36,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:32:36,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:36,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703249006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:36,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:36,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 21:32:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808550784] [2021-05-21 21:32:36,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:32:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:32:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:32:36,498 INFO L87 Difference]: Start difference. First operand 87873 states and 412440 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:37,822 INFO L93 Difference]: Finished difference Result 97671 states and 457254 transitions. [2021-05-21 21:32:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:32:37,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:38,158 INFO L225 Difference]: With dead ends: 97671 [2021-05-21 21:32:38,159 INFO L226 Difference]: Without dead ends: 97564 [2021-05-21 21:32:38,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:32:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97564 states. [2021-05-21 21:32:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97564 to 96045. [2021-05-21 21:32:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96045 states, 96044 states have (on average 4.702969472325185) internal successors, (451692), 96044 states have internal predecessors, (451692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96045 states to 96045 states and 451692 transitions. [2021-05-21 21:32:40,978 INFO L78 Accepts]: Start accepts. Automaton has 96045 states and 451692 transitions. Word has length 25 [2021-05-21 21:32:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:40,978 INFO L482 AbstractCegarLoop]: Abstraction has 96045 states and 451692 transitions. [2021-05-21 21:32:40,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 96045 states and 451692 transitions. [2021-05-21 21:32:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:41,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:41,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:41,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:41,384 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:41,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-05-21 21:32:41,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:41,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821804908] [2021-05-21 21:32:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:41,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821804908] [2021-05-21 21:32:41,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821804908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979536906] [2021-05-21 21:32:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 21:32:41,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:32:41,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:41,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:41,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:41,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979536906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:41,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:41,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:41,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720421887] [2021-05-21 21:32:41,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:41,543 INFO L87 Difference]: Start difference. First operand 96045 states and 451692 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:42,681 INFO L93 Difference]: Finished difference Result 97830 states and 458461 transitions. [2021-05-21 21:32:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:42,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:43,044 INFO L225 Difference]: With dead ends: 97830 [2021-05-21 21:32:43,044 INFO L226 Difference]: Without dead ends: 97714 [2021-05-21 21:32:43,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97714 states. [2021-05-21 21:32:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97714 to 96069. [2021-05-21 21:32:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96069 states, 96068 states have (on average 4.703106133155681) internal successors, (451818), 96068 states have internal predecessors, (451818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96069 states to 96069 states and 451818 transitions. [2021-05-21 21:32:45,847 INFO L78 Accepts]: Start accepts. Automaton has 96069 states and 451818 transitions. Word has length 25 [2021-05-21 21:32:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:45,847 INFO L482 AbstractCegarLoop]: Abstraction has 96069 states and 451818 transitions. [2021-05-21 21:32:45,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 96069 states and 451818 transitions. [2021-05-21 21:32:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:46,046 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:46,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:46,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 21:32:46,246 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-05-21 21:32:46,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:46,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773937760] [2021-05-21 21:32:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:46,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773937760] [2021-05-21 21:32:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773937760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115147539] [2021-05-21 21:32:46,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:32:46,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:32:46,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:46,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115147539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:46,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:46,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399036381] [2021-05-21 21:32:46,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:46,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:46,400 INFO L87 Difference]: Start difference. First operand 96069 states and 451818 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:47,582 INFO L93 Difference]: Finished difference Result 98062 states and 459589 transitions. [2021-05-21 21:32:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:47,968 INFO L225 Difference]: With dead ends: 98062 [2021-05-21 21:32:47,968 INFO L226 Difference]: Without dead ends: 97966 [2021-05-21 21:32:47,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97966 states. [2021-05-21 21:32:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97966 to 96093. [2021-05-21 21:32:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96093 states, 96092 states have (on average 4.7034716729800605) internal successors, (451966), 96092 states have internal predecessors, (451966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96093 states to 96093 states and 451966 transitions. [2021-05-21 21:32:50,795 INFO L78 Accepts]: Start accepts. Automaton has 96093 states and 451966 transitions. Word has length 25 [2021-05-21 21:32:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:50,795 INFO L482 AbstractCegarLoop]: Abstraction has 96093 states and 451966 transitions. [2021-05-21 21:32:50,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 96093 states and 451966 transitions. [2021-05-21 21:32:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:51,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:51,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:51,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:51,207 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-05-21 21:32:51,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:51,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136169017] [2021-05-21 21:32:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:51,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136169017] [2021-05-21 21:32:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136169017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203892767] [2021-05-21 21:32:51,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:32:51,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:32:51,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:51,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:32:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:32:51,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203892767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:51,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:51,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:32:51,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647917682] [2021-05-21 21:32:51,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:32:51,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:32:51,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:51,338 INFO L87 Difference]: Start difference. First operand 96093 states and 451966 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:51,989 INFO L93 Difference]: Finished difference Result 98621 states and 461688 transitions. [2021-05-21 21:32:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:32:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:53,332 INFO L225 Difference]: With dead ends: 98621 [2021-05-21 21:32:53,332 INFO L226 Difference]: Without dead ends: 98525 [2021-05-21 21:32:53,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:32:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98525 states. [2021-05-21 21:32:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98525 to 96141. [2021-05-21 21:32:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96141 states, 96140 states have (on average 4.70395256916996) internal successors, (452238), 96140 states have internal predecessors, (452238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96141 states to 96141 states and 452238 transitions. [2021-05-21 21:32:55,957 INFO L78 Accepts]: Start accepts. Automaton has 96141 states and 452238 transitions. Word has length 25 [2021-05-21 21:32:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:32:55,958 INFO L482 AbstractCegarLoop]: Abstraction has 96141 states and 452238 transitions. [2021-05-21 21:32:55,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 96141 states and 452238 transitions. [2021-05-21 21:32:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:32:56,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:32:56,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:32:57,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:32:57,007 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:32:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:32:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-05-21 21:32:57,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:32:57,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597893739] [2021-05-21 21:32:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:32:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:32:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:32:57,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:32:57,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597893739] [2021-05-21 21:32:57,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597893739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:57,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847869657] [2021-05-21 21:32:57,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:32:57,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:32:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:32:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:32:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:32:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:32:57,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847869657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:32:57,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:32:57,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 21:32:57,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388663241] [2021-05-21 21:32:57,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:32:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:32:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:32:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:32:57,121 INFO L87 Difference]: Start difference. First operand 96141 states and 452238 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:32:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:32:58,009 INFO L93 Difference]: Finished difference Result 107267 states and 496764 transitions. [2021-05-21 21:32:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:32:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:32:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:32:58,390 INFO L225 Difference]: With dead ends: 107267 [2021-05-21 21:32:58,390 INFO L226 Difference]: Without dead ends: 107165 [2021-05-21 21:32:58,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:32:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107165 states. [2021-05-21 21:33:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107165 to 96163. [2021-05-21 21:33:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96163 states, 96162 states have (on average 4.703042781972089) internal successors, (452254), 96162 states have internal predecessors, (452254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96163 states to 96163 states and 452254 transitions. [2021-05-21 21:33:01,306 INFO L78 Accepts]: Start accepts. Automaton has 96163 states and 452254 transitions. Word has length 25 [2021-05-21 21:33:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:01,306 INFO L482 AbstractCegarLoop]: Abstraction has 96163 states and 452254 transitions. [2021-05-21 21:33:01,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 96163 states and 452254 transitions. [2021-05-21 21:33:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:01,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:01,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:01,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:01,719 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-05-21 21:33:01,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:01,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665466649] [2021-05-21 21:33:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:01,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:01,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665466649] [2021-05-21 21:33:01,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665466649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:01,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180602413] [2021-05-21 21:33:01,760 INFO L93 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 21:33:02,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:33:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:33:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:02,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180602413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:02,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:02,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:33:02,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142074339] [2021-05-21 21:33:02,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:33:02,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:02,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:33:02,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:33:02,444 INFO L87 Difference]: Start difference. First operand 96163 states and 452254 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:03,333 INFO L93 Difference]: Finished difference Result 105665 states and 492345 transitions. [2021-05-21 21:33:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:33:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:03,719 INFO L225 Difference]: With dead ends: 105665 [2021-05-21 21:33:03,719 INFO L226 Difference]: Without dead ends: 105515 [2021-05-21 21:33:03,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:33:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105515 states. [2021-05-21 21:33:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105515 to 100600. [2021-05-21 21:33:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100600 states, 100599 states have (on average 4.695384645970636) internal successors, (472351), 100599 states have internal predecessors, (472351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100600 states to 100600 states and 472351 transitions. [2021-05-21 21:33:06,729 INFO L78 Accepts]: Start accepts. Automaton has 100600 states and 472351 transitions. Word has length 25 [2021-05-21 21:33:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:06,729 INFO L482 AbstractCegarLoop]: Abstraction has 100600 states and 472351 transitions. [2021-05-21 21:33:06,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 100600 states and 472351 transitions. [2021-05-21 21:33:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:06,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:06,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:07,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:07,153 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1313736820, now seen corresponding path program 12 times [2021-05-21 21:33:07,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:07,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730779993] [2021-05-21 21:33:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:07,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:07,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730779993] [2021-05-21 21:33:07,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730779993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:07,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985259231] [2021-05-21 21:33:07,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:33:07,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:33:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:07,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:33:07,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:07,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985259231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:07,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:07,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:33:07,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432672381] [2021-05-21 21:33:07,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:33:07,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:07,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:33:07,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:33:07,272 INFO L87 Difference]: Start difference. First operand 100600 states and 472351 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:08,570 INFO L93 Difference]: Finished difference Result 103952 states and 485481 transitions. [2021-05-21 21:33:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:33:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:08,945 INFO L225 Difference]: With dead ends: 103952 [2021-05-21 21:33:08,945 INFO L226 Difference]: Without dead ends: 103908 [2021-05-21 21:33:08,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:33:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103908 states. [2021-05-21 21:33:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103908 to 100692. [2021-05-21 21:33:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100692 states, 100691 states have (on average 4.694391752986861) internal successors, (472683), 100691 states have internal predecessors, (472683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100692 states to 100692 states and 472683 transitions. [2021-05-21 21:33:11,882 INFO L78 Accepts]: Start accepts. Automaton has 100692 states and 472683 transitions. Word has length 25 [2021-05-21 21:33:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:11,882 INFO L482 AbstractCegarLoop]: Abstraction has 100692 states and 472683 transitions. [2021-05-21 21:33:11,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 100692 states and 472683 transitions. [2021-05-21 21:33:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:12,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:12,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:12,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:12,290 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-05-21 21:33:12,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:12,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112532006] [2021-05-21 21:33:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:12,311 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 21:33:12,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:12,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112532006] [2021-05-21 21:33:12,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112532006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:12,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867942771] [2021-05-21 21:33:12,311 INFO 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 21:33:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:33:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867942771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:12,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:12,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:33:12,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413868361] [2021-05-21 21:33:12,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:33:12,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:12,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:33:12,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:33:12,401 INFO L87 Difference]: Start difference. First operand 100692 states and 472683 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:13,035 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2021-05-21 21:33:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:13,917 INFO L93 Difference]: Finished difference Result 122378 states and 564861 transitions. [2021-05-21 21:33:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:33:13,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:14,352 INFO L225 Difference]: With dead ends: 122378 [2021-05-21 21:33:14,352 INFO L226 Difference]: Without dead ends: 120769 [2021-05-21 21:33:14,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:33:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120769 states. [2021-05-21 21:33:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120769 to 103273. [2021-05-21 21:33:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103273 states, 103272 states have (on average 4.6974688202029595) internal successors, (485117), 103272 states have internal predecessors, (485117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103273 states to 103273 states and 485117 transitions. [2021-05-21 21:33:17,482 INFO L78 Accepts]: Start accepts. Automaton has 103273 states and 485117 transitions. Word has length 25 [2021-05-21 21:33:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:17,482 INFO L482 AbstractCegarLoop]: Abstraction has 103273 states and 485117 transitions. [2021-05-21 21:33:17,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 103273 states and 485117 transitions. [2021-05-21 21:33:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:18,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:18,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:18,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 21:33:18,469 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-05-21 21:33:18,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:18,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070869555] [2021-05-21 21:33:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:18,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:18,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070869555] [2021-05-21 21:33:18,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070869555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:18,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244414679] [2021-05-21 21:33:18,498 INFO L93 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 21:33:18,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:33:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:33:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:18,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244414679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:18,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:18,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:33:18,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060176885] [2021-05-21 21:33:18,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:33:18,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:18,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:33:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:33:18,573 INFO L87 Difference]: Start difference. First operand 103273 states and 485117 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:19,328 INFO L93 Difference]: Finished difference Result 106739 states and 498675 transitions. [2021-05-21 21:33:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:33:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:19,706 INFO L225 Difference]: With dead ends: 106739 [2021-05-21 21:33:19,706 INFO L226 Difference]: Without dead ends: 106655 [2021-05-21 21:33:19,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:33:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106655 states. [2021-05-21 21:33:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106655 to 103317. [2021-05-21 21:33:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103317 states, 103316 states have (on average 4.696697510550157) internal successors, (485244), 103316 states have internal predecessors, (485244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103317 states to 103317 states and 485244 transitions. [2021-05-21 21:33:22,731 INFO L78 Accepts]: Start accepts. Automaton has 103317 states and 485244 transitions. Word has length 25 [2021-05-21 21:33:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:22,731 INFO L482 AbstractCegarLoop]: Abstraction has 103317 states and 485244 transitions. [2021-05-21 21:33:22,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 103317 states and 485244 transitions. [2021-05-21 21:33:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:23,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:23,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:23,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 21:33:23,823 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-05-21 21:33:23,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:23,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225173487] [2021-05-21 21:33:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:23,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225173487] [2021-05-21 21:33:23,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225173487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284592219] [2021-05-21 21:33:23,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:33:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:33:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:23,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284592219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:23,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:23,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:33:23,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626568036] [2021-05-21 21:33:23,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:33:23,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:33:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:23,930 INFO L87 Difference]: Start difference. First operand 103317 states and 485244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:24,631 INFO L93 Difference]: Finished difference Result 105638 states and 494245 transitions. [2021-05-21 21:33:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:33:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:25,020 INFO L225 Difference]: With dead ends: 105638 [2021-05-21 21:33:25,020 INFO L226 Difference]: Without dead ends: 105538 [2021-05-21 21:33:25,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105538 states. [2021-05-21 21:33:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105538 to 103392. [2021-05-21 21:33:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103392 states, 103391 states have (on average 4.696830478474916) internal successors, (485610), 103391 states have internal predecessors, (485610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103392 states to 103392 states and 485610 transitions. [2021-05-21 21:33:28,086 INFO L78 Accepts]: Start accepts. Automaton has 103392 states and 485610 transitions. Word has length 25 [2021-05-21 21:33:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:28,086 INFO L482 AbstractCegarLoop]: Abstraction has 103392 states and 485610 transitions. [2021-05-21 21:33:28,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 103392 states and 485610 transitions. [2021-05-21 21:33:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:28,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:28,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:29,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-21 21:33:29,133 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-05-21 21:33:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:29,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80159527] [2021-05-21 21:33:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:29,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:29,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80159527] [2021-05-21 21:33:29,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80159527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:29,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362553940] [2021-05-21 21:33:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:29,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:33:29,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:29,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:33:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:29,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362553940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:29,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:29,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:33:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538535494] [2021-05-21 21:33:29,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:33:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:33:29,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:29,268 INFO L87 Difference]: Start difference. First operand 103392 states and 485610 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:29,999 INFO L93 Difference]: Finished difference Result 105993 states and 495944 transitions. [2021-05-21 21:33:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:33:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:30,376 INFO L225 Difference]: With dead ends: 105993 [2021-05-21 21:33:30,376 INFO L226 Difference]: Without dead ends: 105893 [2021-05-21 21:33:30,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105893 states. [2021-05-21 21:33:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105893 to 103439. [2021-05-21 21:33:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103439 states, 103438 states have (on average 4.69710357895551) internal successors, (485859), 103438 states have internal predecessors, (485859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103439 states to 103439 states and 485859 transitions. [2021-05-21 21:33:33,389 INFO L78 Accepts]: Start accepts. Automaton has 103439 states and 485859 transitions. Word has length 25 [2021-05-21 21:33:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:33,389 INFO L482 AbstractCegarLoop]: Abstraction has 103439 states and 485859 transitions. [2021-05-21 21:33:33,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 103439 states and 485859 transitions. [2021-05-21 21:33:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:33,608 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:33,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:33,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 21:33:33,813 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-05-21 21:33:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:33,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221942369] [2021-05-21 21:33:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:34,363 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-05-21 21:33:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:33:34,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:34,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221942369] [2021-05-21 21:33:34,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221942369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:34,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895214714] [2021-05-21 21:33:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:33:34,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:33:34,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:33:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:33:34,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895214714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:34,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:34,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:33:34,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795349368] [2021-05-21 21:33:34,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:33:34,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:34,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:33:34,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:34,587 INFO L87 Difference]: Start difference. First operand 103439 states and 485859 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:35,317 INFO L93 Difference]: Finished difference Result 104315 states and 489264 transitions. [2021-05-21 21:33:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:33:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:35,695 INFO L225 Difference]: With dead ends: 104315 [2021-05-21 21:33:35,695 INFO L226 Difference]: Without dead ends: 104239 [2021-05-21 21:33:35,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:35,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104239 states. [2021-05-21 21:33:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104239 to 103480. [2021-05-21 21:33:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103480 states, 103479 states have (on average 4.696981996347085) internal successors, (486039), 103479 states have internal predecessors, (486039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103480 states to 103480 states and 486039 transitions. [2021-05-21 21:33:38,708 INFO L78 Accepts]: Start accepts. Automaton has 103480 states and 486039 transitions. Word has length 25 [2021-05-21 21:33:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:38,708 INFO L482 AbstractCegarLoop]: Abstraction has 103480 states and 486039 transitions. [2021-05-21 21:33:38,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 103480 states and 486039 transitions. [2021-05-21 21:33:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:38,925 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:38,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:39,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 21:33:39,126 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-05-21 21:33:39,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:39,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043531039] [2021-05-21 21:33:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:33:39,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:39,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043531039] [2021-05-21 21:33:39,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043531039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:39,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58809487] [2021-05-21 21:33:39,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:33:39,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:33:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:33:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:39,785 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-21 21:33:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:33:39,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58809487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:39,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:39,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:33:39,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593450972] [2021-05-21 21:33:39,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:33:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:39,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:33:39,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:39,793 INFO L87 Difference]: Start difference. First operand 103480 states and 486039 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:40,580 INFO L93 Difference]: Finished difference Result 104856 states and 491459 transitions. [2021-05-21 21:33:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:33:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:40,955 INFO L225 Difference]: With dead ends: 104856 [2021-05-21 21:33:40,955 INFO L226 Difference]: Without dead ends: 104768 [2021-05-21 21:33:40,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104768 states. [2021-05-21 21:33:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104768 to 103498. [2021-05-21 21:33:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103498 states, 103497 states have (on average 4.697083007236925) internal successors, (486134), 103497 states have internal predecessors, (486134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103498 states to 103498 states and 486134 transitions. [2021-05-21 21:33:44,237 INFO L78 Accepts]: Start accepts. Automaton has 103498 states and 486134 transitions. Word has length 25 [2021-05-21 21:33:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:44,237 INFO L482 AbstractCegarLoop]: Abstraction has 103498 states and 486134 transitions. [2021-05-21 21:33:44,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 103498 states and 486134 transitions. [2021-05-21 21:33:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:44,508 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:44,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:44,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:44,731 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-05-21 21:33:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:44,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550542089] [2021-05-21 21:33:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:44,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:44,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550542089] [2021-05-21 21:33:44,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550542089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:44,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646514745] [2021-05-21 21:33:44,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:44,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:33:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:33:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:44,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646514745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:44,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:44,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:33:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837809728] [2021-05-21 21:33:44,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:33:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:33:44,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:44,972 INFO L87 Difference]: Start difference. First operand 103498 states and 486134 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:46,442 INFO L93 Difference]: Finished difference Result 105284 states and 493087 transitions. [2021-05-21 21:33:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:33:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:46,900 INFO L225 Difference]: With dead ends: 105284 [2021-05-21 21:33:46,900 INFO L226 Difference]: Without dead ends: 105184 [2021-05-21 21:33:46,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105184 states. [2021-05-21 21:33:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105184 to 103515. [2021-05-21 21:33:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 4.69741291033097) internal successors, (486248), 103514 states have internal predecessors, (486248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 486248 transitions. [2021-05-21 21:33:49,786 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 486248 transitions. Word has length 25 [2021-05-21 21:33:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:49,786 INFO L482 AbstractCegarLoop]: Abstraction has 103515 states and 486248 transitions. [2021-05-21 21:33:49,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 486248 transitions. [2021-05-21 21:33:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:49,999 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:49,999 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:50,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:50,200 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:50,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 18 times [2021-05-21 21:33:50,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:50,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102614821] [2021-05-21 21:33:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:50,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:50,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102614821] [2021-05-21 21:33:50,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102614821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:50,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689932826] [2021-05-21 21:33:50,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:33:50,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:33:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:33:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:33:50,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689932826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:50,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:50,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 21:33:50,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986058412] [2021-05-21 21:33:50,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:33:50,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:33:50,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:33:50,312 INFO L87 Difference]: Start difference. First operand 103515 states and 486248 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:51,669 INFO L93 Difference]: Finished difference Result 118688 states and 551898 transitions. [2021-05-21 21:33:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:33:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:52,133 INFO L225 Difference]: With dead ends: 118688 [2021-05-21 21:33:52,133 INFO L226 Difference]: Without dead ends: 118688 [2021-05-21 21:33:52,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:33:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118688 states. [2021-05-21 21:33:54,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118688 to 105619. [2021-05-21 21:33:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105619 states, 105618 states have (on average 4.697987085534662) internal successors, (496192), 105618 states have internal predecessors, (496192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105619 states to 105619 states and 496192 transitions. [2021-05-21 21:33:55,117 INFO L78 Accepts]: Start accepts. Automaton has 105619 states and 496192 transitions. Word has length 25 [2021-05-21 21:33:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:33:55,117 INFO L482 AbstractCegarLoop]: Abstraction has 105619 states and 496192 transitions. [2021-05-21 21:33:55,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 105619 states and 496192 transitions. [2021-05-21 21:33:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:33:55,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:33:55,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:33:55,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:33:55,543 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:33:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:33:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-05-21 21:33:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:33:55,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755559876] [2021-05-21 21:33:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:33:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:33:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:33:55,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:33:55,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755559876] [2021-05-21 21:33:55,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755559876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:55,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810028864] [2021-05-21 21:33:55,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:33:55,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:33:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:33:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:33:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:33:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:33:55,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810028864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:33:55,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:33:55,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:33:55,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591067916] [2021-05-21 21:33:55,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:33:55,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:33:55,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:33:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:55,680 INFO L87 Difference]: Start difference. First operand 105619 states and 496192 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:33:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:33:56,932 INFO L93 Difference]: Finished difference Result 108208 states and 506403 transitions. [2021-05-21 21:33:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:33:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:33:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:33:57,324 INFO L225 Difference]: With dead ends: 108208 [2021-05-21 21:33:57,324 INFO L226 Difference]: Without dead ends: 108108 [2021-05-21 21:33:57,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:33:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108108 states. [2021-05-21 21:33:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108108 to 105643. [2021-05-21 21:33:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105643 states, 105642 states have (on average 4.698443800761061) internal successors, (496353), 105642 states have internal predecessors, (496353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105643 states to 105643 states and 496353 transitions. [2021-05-21 21:34:00,324 INFO L78 Accepts]: Start accepts. Automaton has 105643 states and 496353 transitions. Word has length 25 [2021-05-21 21:34:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:00,324 INFO L482 AbstractCegarLoop]: Abstraction has 105643 states and 496353 transitions. [2021-05-21 21:34:00,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 105643 states and 496353 transitions. [2021-05-21 21:34:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:00,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:00,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:00,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:34:00,745 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-05-21 21:34:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:00,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830828352] [2021-05-21 21:34:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:01,346 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-05-21 21:34:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:01,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:01,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830828352] [2021-05-21 21:34:01,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830828352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:01,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729292228] [2021-05-21 21:34:01,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:34:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:01,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729292228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:01,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:01,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:01,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023775373] [2021-05-21 21:34:01,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:01,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:01,536 INFO L87 Difference]: Start difference. First operand 105643 states and 496353 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:02,236 INFO L93 Difference]: Finished difference Result 108139 states and 506170 transitions. [2021-05-21 21:34:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:02,621 INFO L225 Difference]: With dead ends: 108139 [2021-05-21 21:34:02,621 INFO L226 Difference]: Without dead ends: 108063 [2021-05-21 21:34:02,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2021-05-21 21:34:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 105670. [2021-05-21 21:34:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105670 states, 105669 states have (on average 4.69866280555319) internal successors, (496503), 105669 states have internal predecessors, (496503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105670 states to 105670 states and 496503 transitions. [2021-05-21 21:34:05,632 INFO L78 Accepts]: Start accepts. Automaton has 105670 states and 496503 transitions. Word has length 25 [2021-05-21 21:34:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:05,632 INFO L482 AbstractCegarLoop]: Abstraction has 105670 states and 496503 transitions. [2021-05-21 21:34:05,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 105670 states and 496503 transitions. [2021-05-21 21:34:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:06,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:06,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:06,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:34:06,693 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:06,693 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-05-21 21:34:06,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:06,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003953643] [2021-05-21 21:34:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:06,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003953643] [2021-05-21 21:34:06,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003953643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800278614] [2021-05-21 21:34:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 21:34:06,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:34:06,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:06,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:06,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:06,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800278614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:06,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:06,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:06,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541426429] [2021-05-21 21:34:06,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:06,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:06,852 INFO L87 Difference]: Start difference. First operand 105670 states and 496503 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:07,615 INFO L93 Difference]: Finished difference Result 107419 states and 503279 transitions. [2021-05-21 21:34:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:08,005 INFO L225 Difference]: With dead ends: 107419 [2021-05-21 21:34:08,005 INFO L226 Difference]: Without dead ends: 107331 [2021-05-21 21:34:08,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107331 states. [2021-05-21 21:34:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107331 to 105677. [2021-05-21 21:34:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105677 states, 105676 states have (on average 4.698938264128089) internal successors, (496565), 105676 states have internal predecessors, (496565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105677 states to 105677 states and 496565 transitions. [2021-05-21 21:34:11,078 INFO L78 Accepts]: Start accepts. Automaton has 105677 states and 496565 transitions. Word has length 25 [2021-05-21 21:34:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:11,078 INFO L482 AbstractCegarLoop]: Abstraction has 105677 states and 496565 transitions. [2021-05-21 21:34:11,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 105677 states and 496565 transitions. [2021-05-21 21:34:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:11,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:11,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:12,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 21:34:12,088 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-05-21 21:34:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:12,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477171163] [2021-05-21 21:34:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:12,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:12,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477171163] [2021-05-21 21:34:12,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477171163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:12,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130074547] [2021-05-21 21:34:12,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:12,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:34:12,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:12,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130074547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:12,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:12,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:12,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921725268] [2021-05-21 21:34:12,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:12,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:12,191 INFO L87 Difference]: Start difference. First operand 105677 states and 496565 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:12,882 INFO L93 Difference]: Finished difference Result 108226 states and 506520 transitions. [2021-05-21 21:34:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:13,268 INFO L225 Difference]: With dead ends: 108226 [2021-05-21 21:34:13,268 INFO L226 Difference]: Without dead ends: 108150 [2021-05-21 21:34:13,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108150 states. [2021-05-21 21:34:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108150 to 105719. [2021-05-21 21:34:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105719 states, 105718 states have (on average 4.699351103880134) internal successors, (496806), 105718 states have internal predecessors, (496806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105719 states to 105719 states and 496806 transitions. [2021-05-21 21:34:16,419 INFO L78 Accepts]: Start accepts. Automaton has 105719 states and 496806 transitions. Word has length 25 [2021-05-21 21:34:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:16,419 INFO L482 AbstractCegarLoop]: Abstraction has 105719 states and 496806 transitions. [2021-05-21 21:34:16,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 105719 states and 496806 transitions. [2021-05-21 21:34:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:17,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:17,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:17,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 21:34:17,569 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-05-21 21:34:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:17,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037021308] [2021-05-21 21:34:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:17,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:17,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037021308] [2021-05-21 21:34:17,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037021308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:17,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85338922] [2021-05-21 21:34:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 21:34:17,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:34:17,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:17,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85338922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:17,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:17,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868797909] [2021-05-21 21:34:17,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:17,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:17,726 INFO L87 Difference]: Start difference. First operand 105719 states and 496806 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:18,461 INFO L93 Difference]: Finished difference Result 107874 states and 505312 transitions. [2021-05-21 21:34:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:18,856 INFO L225 Difference]: With dead ends: 107874 [2021-05-21 21:34:18,856 INFO L226 Difference]: Without dead ends: 107798 [2021-05-21 21:34:18,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107798 states. [2021-05-21 21:34:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107798 to 105741. [2021-05-21 21:34:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105741 states, 105740 states have (on average 4.69966899943257) internal successors, (496943), 105740 states have internal predecessors, (496943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105741 states to 105741 states and 496943 transitions. [2021-05-21 21:34:21,840 INFO L78 Accepts]: Start accepts. Automaton has 105741 states and 496943 transitions. Word has length 25 [2021-05-21 21:34:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:21,840 INFO L482 AbstractCegarLoop]: Abstraction has 105741 states and 496943 transitions. [2021-05-21 21:34:21,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 105741 states and 496943 transitions. [2021-05-21 21:34:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:22,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:22,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:22,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:34:22,980 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-05-21 21:34:22,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:22,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584052570] [2021-05-21 21:34:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:23,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584052570] [2021-05-21 21:34:23,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584052570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633323362] [2021-05-21 21:34:23,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:23,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:34:23,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:23,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633323362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:23,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:23,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:23,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869930132] [2021-05-21 21:34:23,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:23,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:23,125 INFO L87 Difference]: Start difference. First operand 105741 states and 496943 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:23,847 INFO L93 Difference]: Finished difference Result 107237 states and 502736 transitions. [2021-05-21 21:34:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:23,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:24,236 INFO L225 Difference]: With dead ends: 107237 [2021-05-21 21:34:24,237 INFO L226 Difference]: Without dead ends: 107149 [2021-05-21 21:34:24,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107149 states. [2021-05-21 21:34:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107149 to 105752. [2021-05-21 21:34:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105752 states, 105751 states have (on average 4.699946099800474) internal successors, (497024), 105751 states have internal predecessors, (497024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105752 states to 105752 states and 497024 transitions. [2021-05-21 21:34:27,289 INFO L78 Accepts]: Start accepts. Automaton has 105752 states and 497024 transitions. Word has length 25 [2021-05-21 21:34:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:27,289 INFO L482 AbstractCegarLoop]: Abstraction has 105752 states and 497024 transitions. [2021-05-21 21:34:27,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 105752 states and 497024 transitions. [2021-05-21 21:34:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:28,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:28,231 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:28,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 21:34:28,431 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:28,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1658453014, now seen corresponding path program 19 times [2021-05-21 21:34:28,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:28,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456797818] [2021-05-21 21:34:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:34:28,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456797818] [2021-05-21 21:34:28,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456797818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656366504] [2021-05-21 21:34:28,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:34:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:34:28,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:34:28,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656366504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:28,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:28,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:34:28,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697647988] [2021-05-21 21:34:28,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:34:28,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:34:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:34:28,575 INFO L87 Difference]: Start difference. First operand 105752 states and 497024 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 21:34:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:30,380 INFO L93 Difference]: Finished difference Result 148546 states and 685984 transitions. [2021-05-21 21:34:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:34:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 25 [2021-05-21 21:34:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:31,171 INFO L225 Difference]: With dead ends: 148546 [2021-05-21 21:34:31,171 INFO L226 Difference]: Without dead ends: 147281 [2021-05-21 21:34:31,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:34:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147281 states. [2021-05-21 21:34:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147281 to 117058. [2021-05-21 21:34:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117058 states, 117057 states have (on average 4.7037169925762665) internal successors, (550603), 117057 states have internal predecessors, (550603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117058 states to 117058 states and 550603 transitions. [2021-05-21 21:34:35,374 INFO L78 Accepts]: Start accepts. Automaton has 117058 states and 550603 transitions. Word has length 25 [2021-05-21 21:34:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:35,374 INFO L482 AbstractCegarLoop]: Abstraction has 117058 states and 550603 transitions. [2021-05-21 21:34:35,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 21:34:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 117058 states and 550603 transitions. [2021-05-21 21:34:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:35,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:35,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:34:35,950 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash 208727758, now seen corresponding path program 20 times [2021-05-21 21:34:35,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:35,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499279875] [2021-05-21 21:34:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:34:35,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499279875] [2021-05-21 21:34:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499279875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:34:35,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:34:35,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:34:35,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219820590] [2021-05-21 21:34:35,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:34:35,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:34:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:34:35,975 INFO L87 Difference]: Start difference. First operand 117058 states and 550603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:37,492 INFO L93 Difference]: Finished difference Result 128713 states and 600066 transitions. [2021-05-21 21:34:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:34:37,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:38,085 INFO L225 Difference]: With dead ends: 128713 [2021-05-21 21:34:38,086 INFO L226 Difference]: Without dead ends: 128713 [2021-05-21 21:34:38,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:34:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128713 states. [2021-05-21 21:34:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128713 to 117168. [2021-05-21 21:34:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117168 states, 117167 states have (on average 4.7038500601705255) internal successors, (551136), 117167 states have internal predecessors, (551136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117168 states to 117168 states and 551136 transitions. [2021-05-21 21:34:41,299 INFO L78 Accepts]: Start accepts. Automaton has 117168 states and 551136 transitions. Word has length 25 [2021-05-21 21:34:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:41,299 INFO L482 AbstractCegarLoop]: Abstraction has 117168 states and 551136 transitions. [2021-05-21 21:34:41,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 117168 states and 551136 transitions. [2021-05-21 21:34:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:41,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:41,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:41,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-21 21:34:41,549 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 537875814, now seen corresponding path program 18 times [2021-05-21 21:34:41,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:41,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32603342] [2021-05-21 21:34:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:41,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32603342] [2021-05-21 21:34:41,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32603342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160716436] [2021-05-21 21:34:41,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:34:41,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:34:41,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:41,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:41,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160716436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:41,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:41,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:41,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472962946] [2021-05-21 21:34:41,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:41,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:41,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:41,686 INFO L87 Difference]: Start difference. First operand 117168 states and 551136 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:43,008 INFO L93 Difference]: Finished difference Result 119473 states and 560252 transitions. [2021-05-21 21:34:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:43,508 INFO L225 Difference]: With dead ends: 119473 [2021-05-21 21:34:43,508 INFO L226 Difference]: Without dead ends: 119373 [2021-05-21 21:34:43,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119373 states. [2021-05-21 21:34:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119373 to 117184. [2021-05-21 21:34:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117184 states, 117183 states have (on average 4.7040782366042855) internal successors, (551238), 117183 states have internal predecessors, (551238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117184 states to 117184 states and 551238 transitions. [2021-05-21 21:34:46,617 INFO L78 Accepts]: Start accepts. Automaton has 117184 states and 551238 transitions. Word has length 25 [2021-05-21 21:34:46,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:46,617 INFO L482 AbstractCegarLoop]: Abstraction has 117184 states and 551238 transitions. [2021-05-21 21:34:46,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 117184 states and 551238 transitions. [2021-05-21 21:34:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:47,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:47,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:47,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:34:47,713 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:47,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448482, now seen corresponding path program 19 times [2021-05-21 21:34:47,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:47,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124772297] [2021-05-21 21:34:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:47,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124772297] [2021-05-21 21:34:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124772297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113255877] [2021-05-21 21:34:47,775 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 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 21:34:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:47,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113255877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:47,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:47,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:47,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867864753] [2021-05-21 21:34:47,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:47,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:47,849 INFO L87 Difference]: Start difference. First operand 117184 states and 551238 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:48,635 INFO L93 Difference]: Finished difference Result 118219 states and 555230 transitions. [2021-05-21 21:34:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:48,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:49,069 INFO L225 Difference]: With dead ends: 118219 [2021-05-21 21:34:49,069 INFO L226 Difference]: Without dead ends: 118143 [2021-05-21 21:34:49,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118143 states. [2021-05-21 21:34:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118143 to 117194. [2021-05-21 21:34:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117194 states, 117193 states have (on average 4.7041034874096574) internal successors, (551288), 117193 states have internal predecessors, (551288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117194 states to 117194 states and 551288 transitions. [2021-05-21 21:34:52,961 INFO L78 Accepts]: Start accepts. Automaton has 117194 states and 551288 transitions. Word has length 25 [2021-05-21 21:34:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 117194 states and 551288 transitions. [2021-05-21 21:34:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 117194 states and 551288 transitions. [2021-05-21 21:34:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:53,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:53,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:53,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-05-21 21:34:53,447 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:53,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1180418934, now seen corresponding path program 20 times [2021-05-21 21:34:53,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:53,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149494175] [2021-05-21 21:34:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:53,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149494175] [2021-05-21 21:34:53,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149494175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474517571] [2021-05-21 21:34:53,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 21:34:53,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:34:53,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474517571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:53,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:53,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:53,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221865158] [2021-05-21 21:34:53,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:53,582 INFO L87 Difference]: Start difference. First operand 117194 states and 551288 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:34:55,074 INFO L93 Difference]: Finished difference Result 118548 states and 556592 transitions. [2021-05-21 21:34:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:34:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:34:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:34:55,563 INFO L225 Difference]: With dead ends: 118548 [2021-05-21 21:34:55,563 INFO L226 Difference]: Without dead ends: 118460 [2021-05-21 21:34:55,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118460 states. [2021-05-21 21:34:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118460 to 117198. [2021-05-21 21:34:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117198 states, 117197 states have (on average 4.70423304350794) internal successors, (551322), 117197 states have internal predecessors, (551322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117198 states to 117198 states and 551322 transitions. [2021-05-21 21:34:58,788 INFO L78 Accepts]: Start accepts. Automaton has 117198 states and 551322 transitions. Word has length 25 [2021-05-21 21:34:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:34:58,788 INFO L482 AbstractCegarLoop]: Abstraction has 117198 states and 551322 transitions. [2021-05-21 21:34:58,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:34:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 117198 states and 551322 transitions. [2021-05-21 21:34:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:34:59,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:34:59,056 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:34:59,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:34:59,256 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:34:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:34:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 751087954, now seen corresponding path program 21 times [2021-05-21 21:34:59,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:34:59,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322655285] [2021-05-21 21:34:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:34:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:34:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:59,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:34:59,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322655285] [2021-05-21 21:34:59,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322655285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:59,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983178762] [2021-05-21 21:34:59,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:34:59,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:34:59,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:34:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:34:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:34:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:34:59,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983178762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:34:59,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:34:59,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:34:59,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778600381] [2021-05-21 21:34:59,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:34:59,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:34:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:34:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:34:59,349 INFO L87 Difference]: Start difference. First operand 117198 states and 551322 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:00,708 INFO L93 Difference]: Finished difference Result 118753 states and 557336 transitions. [2021-05-21 21:35:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:35:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:35:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:01,145 INFO L225 Difference]: With dead ends: 118753 [2021-05-21 21:35:01,146 INFO L226 Difference]: Without dead ends: 118653 [2021-05-21 21:35:01,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:35:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118653 states. [2021-05-21 21:35:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118653 to 117200. [2021-05-21 21:35:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117200 states, 117199 states have (on average 4.704528195633069) internal successors, (551366), 117199 states have internal predecessors, (551366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117200 states to 117200 states and 551366 transitions. [2021-05-21 21:35:04,362 INFO L78 Accepts]: Start accepts. Automaton has 117200 states and 551366 transitions. Word has length 25 [2021-05-21 21:35:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 117200 states and 551366 transitions. [2021-05-21 21:35:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 117200 states and 551366 transitions. [2021-05-21 21:35:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:05,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:05,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:05,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:35:05,657 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash -166258994, now seen corresponding path program 19 times [2021-05-21 21:35:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648652522] [2021-05-21 21:35:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:05,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648652522] [2021-05-21 21:35:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648652522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070311051] [2021-05-21 21:35:05,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:35:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:35:05,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:05,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070311051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:05,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:05,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:35:05,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388303292] [2021-05-21 21:35:05,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:35:05,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:35:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:35:05,763 INFO L87 Difference]: Start difference. First operand 117200 states and 551366 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:07,629 INFO L93 Difference]: Finished difference Result 147548 states and 688527 transitions. [2021-05-21 21:35:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:35:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:35:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:08,224 INFO L225 Difference]: With dead ends: 147548 [2021-05-21 21:35:08,225 INFO L226 Difference]: Without dead ends: 146423 [2021-05-21 21:35:08,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:35:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146423 states. [2021-05-21 21:35:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146423 to 133054. [2021-05-21 21:35:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133054 states, 133053 states have (on average 4.703276138080314) internal successors, (625785), 133053 states have internal predecessors, (625785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133054 states to 133054 states and 625785 transitions. [2021-05-21 21:35:12,631 INFO L78 Accepts]: Start accepts. Automaton has 133054 states and 625785 transitions. Word has length 27 [2021-05-21 21:35:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:12,632 INFO L482 AbstractCegarLoop]: Abstraction has 133054 states and 625785 transitions. [2021-05-21 21:35:12,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 133054 states and 625785 transitions. [2021-05-21 21:35:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:13,031 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:13,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:13,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 21:35:13,232 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash 932861774, now seen corresponding path program 21 times [2021-05-21 21:35:13,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:13,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239351776] [2021-05-21 21:35:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:13,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239351776] [2021-05-21 21:35:13,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239351776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372153511] [2021-05-21 21:35:13,263 INFO L93 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 21:35:13,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:35:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:35:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:35:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:13,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372153511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:13,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:13,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:35:13,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621183803] [2021-05-21 21:35:13,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:35:13,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:35:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:35:13,342 INFO L87 Difference]: Start difference. First operand 133054 states and 625785 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:15,211 INFO L93 Difference]: Finished difference Result 144228 states and 674583 transitions. [2021-05-21 21:35:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:35:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:35:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:15,806 INFO L225 Difference]: With dead ends: 144228 [2021-05-21 21:35:15,806 INFO L226 Difference]: Without dead ends: 144058 [2021-05-21 21:35:15,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:35:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144058 states. [2021-05-21 21:35:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144058 to 121212. [2021-05-21 21:35:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121212 states, 121211 states have (on average 4.70567852752638) internal successors, (570380), 121211 states have internal predecessors, (570380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121212 states to 121212 states and 570380 transitions. [2021-05-21 21:35:20,395 INFO L78 Accepts]: Start accepts. Automaton has 121212 states and 570380 transitions. Word has length 27 [2021-05-21 21:35:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:20,395 INFO L482 AbstractCegarLoop]: Abstraction has 121212 states and 570380 transitions. [2021-05-21 21:35:20,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 121212 states and 570380 transitions. [2021-05-21 21:35:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:21,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:21,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:21,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 21:35:21,224 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash -184507126, now seen corresponding path program 22 times [2021-05-21 21:35:21,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:21,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145825519] [2021-05-21 21:35:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:21,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:21,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145825519] [2021-05-21 21:35:21,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145825519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:21,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272671711] [2021-05-21 21:35:21,256 INFO L93 rtionOrderModulation]: Changing 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 21:35:21,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:35:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:35:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:35:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:21,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272671711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:21,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:21,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:35:21,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839683840] [2021-05-21 21:35:21,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:35:21,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:35:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:35:21,341 INFO L87 Difference]: Start difference. First operand 121212 states and 570380 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:23,011 INFO L93 Difference]: Finished difference Result 142703 states and 667037 transitions. [2021-05-21 21:35:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:35:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:35:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:23,589 INFO L225 Difference]: With dead ends: 142703 [2021-05-21 21:35:23,589 INFO L226 Difference]: Without dead ends: 142461 [2021-05-21 21:35:23,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:35:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142461 states. [2021-05-21 21:35:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142461 to 121815. [2021-05-21 21:35:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121815 states, 121814 states have (on average 4.707701906184839) internal successors, (573464), 121814 states have internal predecessors, (573464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121815 states to 121815 states and 573464 transitions. [2021-05-21 21:35:27,026 INFO L78 Accepts]: Start accepts. Automaton has 121815 states and 573464 transitions. Word has length 27 [2021-05-21 21:35:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:27,026 INFO L482 AbstractCegarLoop]: Abstraction has 121815 states and 573464 transitions. [2021-05-21 21:35:27,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 121815 states and 573464 transitions. [2021-05-21 21:35:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:28,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:28,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:28,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 21:35:28,245 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash 625965006, now seen corresponding path program 9 times [2021-05-21 21:35:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:28,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457157682] [2021-05-21 21:35:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:28,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:28,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457157682] [2021-05-21 21:35:28,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457157682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:28,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186457375] [2021-05-21 21:35:28,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:35:28,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:35:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:35:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:35:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:28,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186457375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:28,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:28,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:35:28,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127541981] [2021-05-21 21:35:28,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:35:28,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:35:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:35:28,402 INFO L87 Difference]: Start difference. First operand 121815 states and 573464 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 21:35:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:29,306 INFO L93 Difference]: Finished difference Result 123705 states and 580618 transitions. [2021-05-21 21:35:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:35:29,306 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 27 [2021-05-21 21:35:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:30,351 INFO L225 Difference]: With dead ends: 123705 [2021-05-21 21:35:30,351 INFO L226 Difference]: Without dead ends: 123623 [2021-05-21 21:35:30,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:35:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123623 states. [2021-05-21 21:35:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123623 to 121965. [2021-05-21 21:35:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121965 states, 121964 states have (on average 4.707438260470303) internal successors, (574138), 121964 states have internal predecessors, (574138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121965 states to 121965 states and 574138 transitions. [2021-05-21 21:35:33,745 INFO L78 Accepts]: Start accepts. Automaton has 121965 states and 574138 transitions. Word has length 27 [2021-05-21 21:35:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:33,745 INFO L482 AbstractCegarLoop]: Abstraction has 121965 states and 574138 transitions. [2021-05-21 21:35:33,745 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 21:35:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 121965 states and 574138 transitions. [2021-05-21 21:35:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:34,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:34,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:34,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:35:34,225 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash 871441812, now seen corresponding path program 10 times [2021-05-21 21:35:34,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:34,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568420749] [2021-05-21 21:35:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:34,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:34,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568420749] [2021-05-21 21:35:34,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568420749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:34,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254252258] [2021-05-21 21:35:34,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 21:35:34,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:35:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:35:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:35:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:34,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254252258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:34,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:34,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:35:34,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156297147] [2021-05-21 21:35:34,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:35:34,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:35:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:35:34,386 INFO L87 Difference]: Start difference. First operand 121965 states and 574138 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 21:35:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:35,766 INFO L93 Difference]: Finished difference Result 122799 states and 577229 transitions. [2021-05-21 21:35:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:35:35,767 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 27 [2021-05-21 21:35:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:36,273 INFO L225 Difference]: With dead ends: 122799 [2021-05-21 21:35:36,273 INFO L226 Difference]: Without dead ends: 122717 [2021-05-21 21:35:36,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:35:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122717 states. [2021-05-21 21:35:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122717 to 121999. [2021-05-21 21:35:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121999 states, 121998 states have (on average 4.707495204839423) internal successors, (574305), 121998 states have internal predecessors, (574305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121999 states to 121999 states and 574305 transitions. [2021-05-21 21:35:39,553 INFO L78 Accepts]: Start accepts. Automaton has 121999 states and 574305 transitions. Word has length 27 [2021-05-21 21:35:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:39,553 INFO L482 AbstractCegarLoop]: Abstraction has 121999 states and 574305 transitions. [2021-05-21 21:35:39,553 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 21:35:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 121999 states and 574305 transitions. [2021-05-21 21:35:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:40,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:40,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:40,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-21 21:35:40,773 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:40,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1359658504, now seen corresponding path program 11 times [2021-05-21 21:35:40,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:40,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400920786] [2021-05-21 21:35:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:35:40,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400920786] [2021-05-21 21:35:40,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400920786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660251971] [2021-05-21 21:35:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:35:40,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:35:40,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:35:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:35:40,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:35:40,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660251971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:40,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:40,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:35:40,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395310716] [2021-05-21 21:35:40,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:35:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:35:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:35:40,936 INFO L87 Difference]: Start difference. First operand 121999 states and 574305 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 21:35:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:41,736 INFO L93 Difference]: Finished difference Result 123187 states and 578845 transitions. [2021-05-21 21:35:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:35:41,736 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 27 [2021-05-21 21:35:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:42,825 INFO L225 Difference]: With dead ends: 123187 [2021-05-21 21:35:42,825 INFO L226 Difference]: Without dead ends: 123123 [2021-05-21 21:35:42,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:35:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2021-05-21 21:35:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 122035. [2021-05-21 21:35:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122035 states, 122034 states have (on average 4.707663438058246) internal successors, (574495), 122034 states have internal predecessors, (574495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122035 states to 122035 states and 574495 transitions. [2021-05-21 21:35:46,139 INFO L78 Accepts]: Start accepts. Automaton has 122035 states and 574495 transitions. Word has length 27 [2021-05-21 21:35:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:46,139 INFO L482 AbstractCegarLoop]: Abstraction has 122035 states and 574495 transitions. [2021-05-21 21:35:46,139 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 21:35:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 122035 states and 574495 transitions. [2021-05-21 21:35:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:46,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:46,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:46,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-21 21:35:46,608 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1606692178, now seen corresponding path program 1 times [2021-05-21 21:35:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:46,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91975309] [2021-05-21 21:35:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:46,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:46,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91975309] [2021-05-21 21:35:46,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91975309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:46,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912722031] [2021-05-21 21:35:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:35:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:35:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:46,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912722031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:46,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:46,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:35:46,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362189520] [2021-05-21 21:35:46,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:35:46,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:35:46,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:35:46,726 INFO L87 Difference]: Start difference. First operand 122035 states and 574495 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:48,395 INFO L93 Difference]: Finished difference Result 155104 states and 720964 transitions. [2021-05-21 21:35:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:35:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:35:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:48,998 INFO L225 Difference]: With dead ends: 155104 [2021-05-21 21:35:48,998 INFO L226 Difference]: Without dead ends: 154336 [2021-05-21 21:35:48,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:35:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154336 states. [2021-05-21 21:35:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154336 to 143896. [2021-05-21 21:35:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143896 states, 143895 states have (on average 4.698724764585288) internal successors, (676123), 143895 states have internal predecessors, (676123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143896 states to 143896 states and 676123 transitions. [2021-05-21 21:35:53,407 INFO L78 Accepts]: Start accepts. Automaton has 143896 states and 676123 transitions. Word has length 27 [2021-05-21 21:35:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:35:53,407 INFO L482 AbstractCegarLoop]: Abstraction has 143896 states and 676123 transitions. [2021-05-21 21:35:53,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:35:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 143896 states and 676123 transitions. [2021-05-21 21:35:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:35:54,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:35:54,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:35:54,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:35:54,673 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:35:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:35:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2057426258, now seen corresponding path program 2 times [2021-05-21 21:35:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:35:54,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58699946] [2021-05-21 21:35:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:35:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:35:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:54,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:35:54,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58699946] [2021-05-21 21:35:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58699946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:54,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887192621] [2021-05-21 21:35:54,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 21:35:54,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:35:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:35:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:35:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:35:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:35:54,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887192621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:35:54,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:35:54,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:35:54,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214303604] [2021-05-21 21:35:54,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:35:54,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:35:54,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:35:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:35:54,828 INFO L87 Difference]: Start difference. First operand 143896 states and 676123 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 21:35:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:35:56,642 INFO L93 Difference]: Finished difference Result 192044 states and 890559 transitions. [2021-05-21 21:35:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:35:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 27 [2021-05-21 21:35:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:35:57,433 INFO L225 Difference]: With dead ends: 192044 [2021-05-21 21:35:57,433 INFO L226 Difference]: Without dead ends: 190887 [2021-05-21 21:35:57,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:35:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190887 states. [2021-05-21 21:36:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190887 to 168910. [2021-05-21 21:36:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168910 states, 168909 states have (on average 4.692899727071974) internal successors, (792673), 168909 states have internal predecessors, (792673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168910 states to 168910 states and 792673 transitions. [2021-05-21 21:36:03,240 INFO L78 Accepts]: Start accepts. Automaton has 168910 states and 792673 transitions. Word has length 27 [2021-05-21 21:36:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:03,241 INFO L482 AbstractCegarLoop]: Abstraction has 168910 states and 792673 transitions. [2021-05-21 21:36:03,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 21:36:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 168910 states and 792673 transitions. [2021-05-21 21:36:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:36:04,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:36:04,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:36:04,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:36:04,861 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:36:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:36:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1077781872, now seen corresponding path program 20 times [2021-05-21 21:36:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:36:04,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338158052] [2021-05-21 21:36:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:36:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:36:04,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:36:04,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338158052] [2021-05-21 21:36:04,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338158052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:04,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317195616] [2021-05-21 21:36:04,901 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 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 21:36:04,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:36:04,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:36:04,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:36:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:36:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:36:05,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317195616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:05,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:36:05,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 21:36:05,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397285277] [2021-05-21 21:36:05,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:36:05,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:36:05,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:36:05,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:36:05,035 INFO L87 Difference]: Start difference. First operand 168910 states and 792673 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 21:36:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:36:07,467 INFO L93 Difference]: Finished difference Result 184550 states and 860326 transitions. [2021-05-21 21:36:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:36:07,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 27 [2021-05-21 21:36:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:36:08,647 INFO L225 Difference]: With dead ends: 184550 [2021-05-21 21:36:08,647 INFO L226 Difference]: Without dead ends: 184501 [2021-05-21 21:36:08,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:36:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184501 states. [2021-05-21 21:36:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184501 to 169053. [2021-05-21 21:36:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169053 states, 169052 states have (on average 4.692006009985094) internal successors, (793193), 169052 states have internal predecessors, (793193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169053 states to 169053 states and 793193 transitions. [2021-05-21 21:36:14,432 INFO L78 Accepts]: Start accepts. Automaton has 169053 states and 793193 transitions. Word has length 27 [2021-05-21 21:36:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:14,432 INFO L482 AbstractCegarLoop]: Abstraction has 169053 states and 793193 transitions. [2021-05-21 21:36:14,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 21:36:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 169053 states and 793193 transitions. [2021-05-21 21:36:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:36:14,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:36:14,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:36:15,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:36:15,082 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:36:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:36:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1048149518, now seen corresponding path program 3 times [2021-05-21 21:36:15,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:36:15,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679196789] [2021-05-21 21:36:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:36:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:36:15,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:36:15,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679196789] [2021-05-21 21:36:15,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679196789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:15,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391246807] [2021-05-21 21:36:15,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:36:15,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:36:15,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:36:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:36:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:36:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:36:15,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391246807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:15,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:36:15,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:36:15,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818165451] [2021-05-21 21:36:15,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:36:15,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:36:15,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:36:15,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:36:15,199 INFO L87 Difference]: Start difference. First operand 169053 states and 793193 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:36:17,480 INFO L93 Difference]: Finished difference Result 230190 states and 1066278 transitions. [2021-05-21 21:36:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:36:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:36:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:36:19,185 INFO L225 Difference]: With dead ends: 230190 [2021-05-21 21:36:19,185 INFO L226 Difference]: Without dead ends: 228007 [2021-05-21 21:36:19,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:36:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228007 states. [2021-05-21 21:36:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228007 to 157964. [2021-05-21 21:36:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157964 states, 157963 states have (on average 4.688616954603293) internal successors, (740628), 157963 states have internal predecessors, (740628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157964 states to 157964 states and 740628 transitions. [2021-05-21 21:36:24,632 INFO L78 Accepts]: Start accepts. Automaton has 157964 states and 740628 transitions. Word has length 27 [2021-05-21 21:36:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:24,632 INFO L482 AbstractCegarLoop]: Abstraction has 157964 states and 740628 transitions. [2021-05-21 21:36:24,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 157964 states and 740628 transitions. [2021-05-21 21:36:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:36:25,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:36:25,832 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:36:26,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:36:26,033 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:36:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:36:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1446762584, now seen corresponding path program 21 times [2021-05-21 21:36:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:36:26,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649269078] [2021-05-21 21:36:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:36:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:36:26,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:36:26,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649269078] [2021-05-21 21:36:26,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649269078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:26,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323514686] [2021-05-21 21:36:26,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 21:36:26,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:36:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:36:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:36:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:36:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:36:26,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323514686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:26,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:36:26,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-21 21:36:26,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573451348] [2021-05-21 21:36:26,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:36:26,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:36:26,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:36:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:36:26,178 INFO L87 Difference]: Start difference. First operand 157964 states and 740628 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 21:36:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:36:28,177 INFO L93 Difference]: Finished difference Result 173681 states and 808144 transitions. [2021-05-21 21:36:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:36:28,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 27 [2021-05-21 21:36:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:36:28,875 INFO L225 Difference]: With dead ends: 173681 [2021-05-21 21:36:28,876 INFO L226 Difference]: Without dead ends: 173615 [2021-05-21 21:36:28,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:36:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173615 states. [2021-05-21 21:36:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173615 to 158249. [2021-05-21 21:36:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158249 states, 158248 states have (on average 4.688217228653759) internal successors, (741901), 158248 states have internal predecessors, (741901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158249 states to 158249 states and 741901 transitions. [2021-05-21 21:36:34,251 INFO L78 Accepts]: Start accepts. Automaton has 158249 states and 741901 transitions. Word has length 27 [2021-05-21 21:36:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:34,251 INFO L482 AbstractCegarLoop]: Abstraction has 158249 states and 741901 transitions. [2021-05-21 21:36:34,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 21:36:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 158249 states and 741901 transitions. [2021-05-21 21:36:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:36:34,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:36:34,760 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:36:34,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-21 21:36:34,961 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:36:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:36:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1299795410, now seen corresponding path program 1 times [2021-05-21 21:36:34,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:36:34,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855490377] [2021-05-21 21:36:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:36:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:35,029 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 21:36:35,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:36:35,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855490377] [2021-05-21 21:36:35,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855490377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:35,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531860641] [2021-05-21 21:36:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order 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 21:36:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:36:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:36:35,125 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 21:36:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531860641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:35,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:36:35,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 21:36:35,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832543765] [2021-05-21 21:36:35,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:36:35,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:36:35,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:36:35,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:36:35,128 INFO L87 Difference]: Start difference. First operand 158249 states and 741901 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:36:36,966 INFO L93 Difference]: Finished difference Result 160685 states and 751012 transitions. [2021-05-21 21:36:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:36:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:36:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:36:37,616 INFO L225 Difference]: With dead ends: 160685 [2021-05-21 21:36:37,616 INFO L226 Difference]: Without dead ends: 160585 [2021-05-21 21:36:37,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:36:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160585 states. [2021-05-21 21:36:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160585 to 158284. [2021-05-21 21:36:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158284 states, 158283 states have (on average 4.688456751514692) internal successors, (742103), 158283 states have internal predecessors, (742103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158284 states to 158284 states and 742103 transitions. [2021-05-21 21:36:42,106 INFO L78 Accepts]: Start accepts. Automaton has 158284 states and 742103 transitions. Word has length 27 [2021-05-21 21:36:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:42,107 INFO L482 AbstractCegarLoop]: Abstraction has 158284 states and 742103 transitions. [2021-05-21 21:36:42,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 158284 states and 742103 transitions. [2021-05-21 21:36:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:36:43,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:36:43,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:36:43,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 21:36:43,493 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:36:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:36:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2127368078, now seen corresponding path program 2 times [2021-05-21 21:36:43,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:36:43,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597477390] [2021-05-21 21:36:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:36:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:43,578 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 21:36:43,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:36:43,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597477390] [2021-05-21 21:36:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597477390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:43,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197850344] [2021-05-21 21:36:43,578 INFO L93 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 21:36:43,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:36:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:36:43,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:36:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:36:43,647 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 21:36:43,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197850344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:43,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:36:43,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 21:36:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843181308] [2021-05-21 21:36:43,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:36:43,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:36:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:36:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:36:43,647 INFO L87 Difference]: Start difference. First operand 158284 states and 742103 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:36:45,194 INFO L93 Difference]: Finished difference Result 161393 states and 754186 transitions. [2021-05-21 21:36:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:36:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:36:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:36:45,894 INFO L225 Difference]: With dead ends: 161393 [2021-05-21 21:36:45,895 INFO L226 Difference]: Without dead ends: 161317 [2021-05-21 21:36:45,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:36:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161317 states. [2021-05-21 21:36:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161317 to 158335. [2021-05-21 21:36:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158335 states, 158334 states have (on average 4.688613942678136) internal successors, (742367), 158334 states have internal predecessors, (742367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158335 states to 158335 states and 742367 transitions. [2021-05-21 21:36:51,599 INFO L78 Accepts]: Start accepts. Automaton has 158335 states and 742367 transitions. Word has length 27 [2021-05-21 21:36:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:51,599 INFO L482 AbstractCegarLoop]: Abstraction has 158335 states and 742367 transitions. [2021-05-21 21:36:51,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 158335 states and 742367 transitions. [2021-05-21 21:36:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:36:52,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:36:52,434 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:36:52,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 21:36:52,634 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:36:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:36:52,635 INFO L82 PathProgramCache]: Analyzing trace with hash -418499338, now seen corresponding path program 3 times [2021-05-21 21:36:52,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:36:52,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327347530] [2021-05-21 21:36:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:36:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:36:52,770 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 21:36:52,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:36:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327347530] [2021-05-21 21:36:52,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327347530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191033743] [2021-05-21 21:36:52,770 INFO L93 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 21:36:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:36:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:36:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:36:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:36:52,875 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 21:36:52,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191033743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:36:52,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:36:52,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 21:36:52,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054477647] [2021-05-21 21:36:52,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:36:52,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:36:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:36:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:36:52,877 INFO L87 Difference]: Start difference. First operand 158335 states and 742367 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:36:54,608 INFO L93 Difference]: Finished difference Result 160525 states and 750588 transitions. [2021-05-21 21:36:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:36:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:36:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:36:55,227 INFO L225 Difference]: With dead ends: 160525 [2021-05-21 21:36:55,227 INFO L226 Difference]: Without dead ends: 160437 [2021-05-21 21:36:55,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:36:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160437 states. [2021-05-21 21:36:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160437 to 158356. [2021-05-21 21:36:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158356 states, 158355 states have (on average 4.688806794859651) internal successors, (742496), 158355 states have internal predecessors, (742496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158356 states to 158356 states and 742496 transitions. [2021-05-21 21:36:59,780 INFO L78 Accepts]: Start accepts. Automaton has 158356 states and 742496 transitions. Word has length 27 [2021-05-21 21:36:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:36:59,780 INFO L482 AbstractCegarLoop]: Abstraction has 158356 states and 742496 transitions. [2021-05-21 21:36:59,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:36:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 158356 states and 742496 transitions. [2021-05-21 21:37:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:37:00,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:00,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:01,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 21:37:01,145 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:37:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1918328274, now seen corresponding path program 4 times [2021-05-21 21:37:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:01,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063448679] [2021-05-21 21:37:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:01,206 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 21:37:01,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:01,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063448679] [2021-05-21 21:37:01,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063448679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:01,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752326221] [2021-05-21 21:37:01,206 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 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 21:37:01,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:37:01,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:37:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:01,284 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 21:37:01,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752326221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:01,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:01,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:37:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828006480] [2021-05-21 21:37:01,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:37:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:37:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:37:01,285 INFO L87 Difference]: Start difference. First operand 158356 states and 742496 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 21:37:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:02,843 INFO L93 Difference]: Finished difference Result 163254 states and 762103 transitions. [2021-05-21 21:37:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:37:02,844 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 27 [2021-05-21 21:37:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:03,509 INFO L225 Difference]: With dead ends: 163254 [2021-05-21 21:37:03,509 INFO L226 Difference]: Without dead ends: 163178 [2021-05-21 21:37:03,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:37:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163178 states. [2021-05-21 21:37:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163178 to 158476. [2021-05-21 21:37:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158476 states, 158475 states have (on average 4.689004574854078) internal successors, (743090), 158475 states have internal predecessors, (743090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158476 states to 158476 states and 743090 transitions. [2021-05-21 21:37:08,209 INFO L78 Accepts]: Start accepts. Automaton has 158476 states and 743090 transitions. Word has length 27 [2021-05-21 21:37:08,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:08,209 INFO L482 AbstractCegarLoop]: Abstraction has 158476 states and 743090 transitions. [2021-05-21 21:37:08,209 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 21:37:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 158476 states and 743090 transitions. [2021-05-21 21:37:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:37:08,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:08,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:08,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-21 21:37:08,798 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:37:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash 574596134, now seen corresponding path program 5 times [2021-05-21 21:37:08,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:08,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933341470] [2021-05-21 21:37:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:08,889 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 21:37:08,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:08,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933341470] [2021-05-21 21:37:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933341470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:08,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681120663] [2021-05-21 21:37:08,889 INFO L93 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 21:37:08,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:37:08,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:37:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:08,966 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 21:37:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681120663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:08,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:08,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 21:37:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600763301] [2021-05-21 21:37:08,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:37:08,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:08,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:37:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:08,966 INFO L87 Difference]: Start difference. First operand 158476 states and 743090 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:10,654 INFO L93 Difference]: Finished difference Result 163798 states and 764346 transitions. [2021-05-21 21:37:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:37:10,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:37:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:11,317 INFO L225 Difference]: With dead ends: 163798 [2021-05-21 21:37:11,318 INFO L226 Difference]: Without dead ends: 163722 [2021-05-21 21:37:11,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163722 states. [2021-05-21 21:37:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163722 to 158493. [2021-05-21 21:37:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158493 states, 158492 states have (on average 4.688968528379982) internal successors, (743164), 158492 states have internal predecessors, (743164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158493 states to 158493 states and 743164 transitions. [2021-05-21 21:37:16,561 INFO L78 Accepts]: Start accepts. Automaton has 158493 states and 743164 transitions. Word has length 27 [2021-05-21 21:37:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:16,561 INFO L482 AbstractCegarLoop]: Abstraction has 158493 states and 743164 transitions. [2021-05-21 21:37:16,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 158493 states and 743164 transitions. [2021-05-21 21:37:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:37:16,972 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:37:16,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:37:17,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:37:17,173 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:37:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:37:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1971271282, now seen corresponding path program 6 times [2021-05-21 21:37:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:37:17,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308972667] [2021-05-21 21:37:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:37:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:37:17,245 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 21:37:17,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:37:17,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308972667] [2021-05-21 21:37:17,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308972667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:17,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539688096] [2021-05-21 21:37:17,245 INFO L93 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 21:37:17,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:37:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:37:17,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:37:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:37:17,320 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 21:37:17,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539688096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:37:17,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:37:17,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 21:37:17,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574255082] [2021-05-21 21:37:17,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:37:17,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:37:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:37:17,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:17,321 INFO L87 Difference]: Start difference. First operand 158493 states and 743164 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:37:19,020 INFO L93 Difference]: Finished difference Result 162734 states and 759671 transitions. [2021-05-21 21:37:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:37:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:37:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:37:19,678 INFO L225 Difference]: With dead ends: 162734 [2021-05-21 21:37:19,678 INFO L226 Difference]: Without dead ends: 162646 [2021-05-21 21:37:19,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:37:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162646 states. [2021-05-21 21:37:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162646 to 158518. [2021-05-21 21:37:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158518 states, 158517 states have (on average 4.689320388349515) internal successors, (743337), 158517 states have internal predecessors, (743337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158518 states to 158518 states and 743337 transitions. [2021-05-21 21:37:24,898 INFO L78 Accepts]: Start accepts. Automaton has 158518 states and 743337 transitions. Word has length 27 [2021-05-21 21:37:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:37:24,898 INFO L482 AbstractCegarLoop]: Abstraction has 158518 states and 743337 transitions. [2021-05-21 21:37:24,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:37:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 158518 states and 743337 transitions. Received shutdown request... [2021-05-21 21:37:25,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-21 21:37:25,453 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:37:25,454 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:37:25,455 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:37:25,455 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:37:25 BasicIcfg [2021-05-21 21:37:25,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:37:25,456 INFO L168 Benchmark]: Toolchain (without parser) took 630584.17 ms. Allocated memory was 369.1 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 348.4 MB in the beginning and 9.0 GB in the end (delta: -8.7 GB). Peak memory consumption was 7.0 GB. Max. memory is 16.0 GB. [2021-05-21 21:37:25,456 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory was 349.5 MB in the beginning and 349.4 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:37:25,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.48 ms. Allocated memory is still 369.1 MB. Free memory was 348.3 MB in the beginning and 346.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:37:25,456 INFO L168 Benchmark]: Boogie Preprocessor took 14.85 ms. Allocated memory is still 369.1 MB. Free memory was 346.8 MB in the beginning and 345.8 MB in the end (delta: 984.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:37:25,456 INFO L168 Benchmark]: RCFGBuilder took 279.96 ms. Allocated memory is still 369.1 MB. Free memory was 345.7 MB in the beginning and 332.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:37:25,456 INFO L168 Benchmark]: TraceAbstraction took 630265.43 ms. Allocated memory was 369.1 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 331.9 MB in the beginning and 9.0 GB in the end (delta: -8.7 GB). Peak memory consumption was 6.9 GB. Max. memory is 16.0 GB. [2021-05-21 21:37:25,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory was 349.5 MB in the beginning and 349.4 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.48 ms. Allocated memory is still 369.1 MB. Free memory was 348.3 MB in the beginning and 346.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.85 ms. Allocated memory is still 369.1 MB. Free memory was 346.8 MB in the beginning and 345.8 MB in the end (delta: 984.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 279.96 ms. Allocated memory is still 369.1 MB. Free memory was 345.7 MB in the beginning and 332.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 630265.43 ms. Allocated memory was 369.1 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 331.9 MB in the beginning and 9.0 GB in the end (delta: -8.7 GB). Peak memory consumption was 6.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while IsEmpty was searching accepting run (input had 158518 states). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 630096.4ms, OverallIterations: 123, TraceHistogramMax: 3, EmptinessCheckTime: 45622.1ms, AutomataDifference: 191232.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 102.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6515 SDtfs, 13422 SDslu, 23090 SDs, 0 SdLazy, 23857 SolverSat, 4020 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12754.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3966 GetRequests, 2446 SyntacticMatches, 270 SemanticMatches, 1250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 11564.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=181308occurred in iteration=69, InterpolantAutomatonStates: 1355, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 347890.2ms AutomataMinimizationTime, 123 MinimizatonAttempts, 1545535 StatesRemovedByMinimization, 123 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 461.1ms SsaConstructionTime, 1364.3ms SatisfiabilityAnalysisTime, 15744.0ms InterpolantComputationTime, 5910 NumberOfCodeBlocks, 5905 NumberOfCodeBlocksAsserted, 344 NumberOfCheckSat, 5672 ConstructedInterpolants, 0 QuantifiedInterpolants, 26221 SizeOfPredicates, 125 NumberOfNonLiveVariables, 8132 ConjunctsInSsa, 1170 ConjunctsInUnsatCore, 238 InterpolantComputations, 10 PerfectInterpolantSequences, 231/928 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown