/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/pthread_inc.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 01:31:42,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 01:31:42,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 01:31:42,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 01:31:42,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 01:31:42,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 01:31:42,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 01:31:42,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 01:31:42,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 01:31:42,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 01:31:42,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 01:31:42,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 01:31:42,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 01:31:42,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 01:31:42,884 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 01:31:42,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 01:31:42,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 01:31:42,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 01:31:42,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 01:31:42,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 01:31:42,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 01:31:42,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 01:31:42,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 01:31:42,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 01:31:42,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 01:31:42,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 01:31:42,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 01:31:42,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 01:31:42,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 01:31:42,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 01:31:42,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 01:31:42,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:31:42,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 01:31:42,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 01:31:42,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 01:31:42,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 01:31:42,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 01:31:42,888 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 01:31:42,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 01:31:42,888 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 01:31:42,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 01:31:43,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 01:31:43,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 01:31:43,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 01:31:43,212 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 01:31:43,214 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 01:31:43,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_inc.bpl [2021-05-22 01:31:43,215 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_inc.bpl' [2021-05-22 01:31:43,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 01:31:43,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 01:31:43,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 01:31:43,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 01:31:43,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 01:31:43,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 01:31:43,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 01:31:43,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 01:31:43,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 01:31:43,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... [2021-05-22 01:31:43,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 01:31:43,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 01:31:43,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 01:31:43,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 01:31:43,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:31:43,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 01:31:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 01:31:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 01:31:43,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-05-22 01:31:43,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-05-22 01:31:43,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-05-22 01:31:43,381 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 01:31:43,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 01:31:43,508 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-22 01:31:43,509 INFO L202 PluginConnector]: Adding new model pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:31:43 BoogieIcfgContainer [2021-05-22 01:31:43,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 01:31:43,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 01:31:43,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 01:31:43,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 01:31:43,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:31:43" (1/2) ... [2021-05-22 01:31:43,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a82fa and model type pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 01:31:43, skipping insertion in model container [2021-05-22 01:31:43,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:31:43" (2/2) ... [2021-05-22 01:31:43,515 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread_inc.bpl [2021-05-22 01:31:43,520 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 01:31:43,520 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 01:31:43,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 01:31:43,521 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 01:31:43,535 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,536 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,536 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,536 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,537 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,537 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,537 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,537 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,539 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,541 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:31:43,557 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-22 01:31:43,574 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:43,575 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:43,575 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:43,575 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:43,575 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:43,575 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:43,575 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:43,575 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:31:43,582 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 27 flow [2021-05-22 01:31:43,590 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 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) [2021-05-22 01:31:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 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) [2021-05-22 01:31:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-22 01:31:43,597 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:43,597 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:43,598 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash -924550739, now seen corresponding path program 1 times [2021-05-22 01:31:43,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:43,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133591007] [2021-05-22 01:31:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:43,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:43,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133591007] [2021-05-22 01:31:43,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133591007] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:43,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:43,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76864023] [2021-05-22 01:31:43,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:43,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:43,752 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 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) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:43,768 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-05-22 01:31:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-05-22 01:31:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:43,773 INFO L225 Difference]: With dead ends: 24 [2021-05-22 01:31:43,773 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:31:43,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:31:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:31:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:31:43,791 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-05-22 01:31:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:43,791 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:31:43,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:31:43,792 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:31:43,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 01:31:43,792 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:31:43,811 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:31:43,813 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:43,813 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:43,813 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:43,813 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:43,813 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:43,813 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:43,813 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:43,813 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:31:43,814 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 27 flow [2021-05-22 01:31:43,816 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 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) [2021-05-22 01:31:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 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) [2021-05-22 01:31:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-05-22 01:31:43,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:43,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-05-22 01:31:43,817 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:31:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:43,817 INFO L82 PathProgramCache]: Analyzing trace with hash 50162, now seen corresponding path program 1 times [2021-05-22 01:31:43,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:43,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330919817] [2021-05-22 01:31:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:43,822 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:43,824 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:43,834 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:31:43,834 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:31:43,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 01:31:43,835 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:31:43,835 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:31:43,835 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-05-22 01:31:43,839 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,841 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,841 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,841 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,841 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,842 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,842 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,842 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,842 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,842 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,843 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,844 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:43,845 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:31:43,845 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 01:31:43,847 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:43,847 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:43,848 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:43,848 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:43,848 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:43,848 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:43,848 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:43,848 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:31:43,849 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 50 flow [2021-05-22 01:31:43,877 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-22 01:31:43,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:43,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:43,887 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -479360263, now seen corresponding path program 1 times [2021-05-22 01:31:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:43,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284428684] [2021-05-22 01:31:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:43,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:43,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284428684] [2021-05-22 01:31:43,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284428684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:43,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:43,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:43,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425055113] [2021-05-22 01:31:43,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:43,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:43,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:43,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:43,939 INFO L87 Difference]: Start difference. First operand has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,007 INFO L93 Difference]: Finished difference Result 260 states and 602 transitions. [2021-05-22 01:31:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:44,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-05-22 01:31:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:44,018 INFO L225 Difference]: With dead ends: 260 [2021-05-22 01:31:44,019 INFO L226 Difference]: Without dead ends: 198 [2021-05-22 01:31:44,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-22 01:31:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2021-05-22 01:31:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 2.396551724137931) internal successors, (417), 179 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 417 transitions. [2021-05-22 01:31:44,075 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 417 transitions. Word has length 7 [2021-05-22 01:31:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:44,076 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 417 transitions. [2021-05-22 01:31:44,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 417 transitions. [2021-05-22 01:31:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:31:44,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:44,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 01:31:44,077 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1511473967, now seen corresponding path program 1 times [2021-05-22 01:31:44,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536973417] [2021-05-22 01:31:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:44,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536973417] [2021-05-22 01:31:44,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536973417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:44,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:44,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:44,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901304361] [2021-05-22 01:31:44,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:44,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,122 INFO L87 Difference]: Start difference. First operand 180 states and 417 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,160 INFO L93 Difference]: Finished difference Result 174 states and 389 transitions. [2021-05-22 01:31:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-22 01:31:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:44,165 INFO L225 Difference]: With dead ends: 174 [2021-05-22 01:31:44,165 INFO L226 Difference]: Without dead ends: 142 [2021-05-22 01:31:44,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-22 01:31:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-22 01:31:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 2.253623188405797) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-05-22 01:31:44,174 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 8 [2021-05-22 01:31:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:44,175 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-05-22 01:31:44,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-05-22 01:31:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:44,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:44,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 01:31:44,177 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 115900371, now seen corresponding path program 1 times [2021-05-22 01:31:44,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192199980] [2021-05-22 01:31:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:44,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192199980] [2021-05-22 01:31:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192199980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:44,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:44,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:44,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157895933] [2021-05-22 01:31:44,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:44,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:44,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:44,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:44,213 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,280 INFO L93 Difference]: Finished difference Result 172 states and 370 transitions. [2021-05-22 01:31:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:31:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:44,284 INFO L225 Difference]: With dead ends: 172 [2021-05-22 01:31:44,284 INFO L226 Difference]: Without dead ends: 130 [2021-05-22 01:31:44,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-22 01:31:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-22 01:31:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 2.2142857142857144) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-05-22 01:31:44,304 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 11 [2021-05-22 01:31:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:44,304 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-05-22 01:31:44,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-05-22 01:31:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:44,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:44,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 01:31:44,306 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash -150011963, now seen corresponding path program 1 times [2021-05-22 01:31:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272713245] [2021-05-22 01:31:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:44,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272713245] [2021-05-22 01:31:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272713245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:44,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:44,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:31:44,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902860553] [2021-05-22 01:31:44,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:44,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:44,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,344 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,362 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-05-22 01:31:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:44,364 INFO L225 Difference]: With dead ends: 58 [2021-05-22 01:31:44,364 INFO L226 Difference]: Without dead ends: 52 [2021-05-22 01:31:44,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-22 01:31:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-22 01:31:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.84) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 92 transitions. [2021-05-22 01:31:44,367 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 92 transitions. Word has length 11 [2021-05-22 01:31:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:44,367 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 92 transitions. [2021-05-22 01:31:44,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 92 transitions. [2021-05-22 01:31:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:44,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:44,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 01:31:44,368 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1323081787, now seen corresponding path program 2 times [2021-05-22 01:31:44,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309588333] [2021-05-22 01:31:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:44,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309588333] [2021-05-22 01:31:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309588333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:44,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:44,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:44,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158536535] [2021-05-22 01:31:44,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:44,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:44,439 INFO L87 Difference]: Start difference. First operand 52 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,474 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2021-05-22 01:31:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 01:31:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:44,474 INFO L225 Difference]: With dead ends: 40 [2021-05-22 01:31:44,474 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:31:44,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:31:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:31:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:31:44,476 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-05-22 01:31:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:44,476 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:31:44,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:31:44,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:31:44,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 01:31:44,477 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:31:44,478 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:31:44,479 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:44,479 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:44,479 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:44,479 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:44,480 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:44,480 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:44,480 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:44,480 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:31:44,482 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 50 flow [2021-05-22 01:31:44,494 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-05-22 01:31:44,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,495 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-05-22 01:31:44,495 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:31:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2146966, now seen corresponding path program 1 times [2021-05-22 01:31:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956527580] [2021-05-22 01:31:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:44,506 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:44,510 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:44,514 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:31:44,514 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:31:44,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 01:31:44,515 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:31:44,515 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:31:44,515 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-05-22 01:31:44,520 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,520 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,520 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,521 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,521 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,521 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,521 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,521 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,522 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,522 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,522 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,522 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,522 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,522 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,524 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,524 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,525 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,525 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,525 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,525 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,526 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,526 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,527 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,529 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,530 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,531 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,533 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:44,535 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:31:44,536 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-22 01:31:44,536 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:44,537 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:44,537 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:44,537 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:44,537 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:44,537 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:44,537 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:44,537 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:31:44,539 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 75 flow [2021-05-22 01:31:44,640 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-22 01:31:44,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,649 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:44,650 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1274047013, now seen corresponding path program 1 times [2021-05-22 01:31:44,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015337500] [2021-05-22 01:31:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:44,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:44,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015337500] [2021-05-22 01:31:44,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015337500] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:44,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:44,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:44,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894038401] [2021-05-22 01:31:44,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:44,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:44,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,690 INFO L87 Difference]: Start difference. First operand has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,755 INFO L93 Difference]: Finished difference Result 2348 states and 7485 transitions. [2021-05-22 01:31:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:44,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-05-22 01:31:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:44,773 INFO L225 Difference]: With dead ends: 2348 [2021-05-22 01:31:44,773 INFO L226 Difference]: Without dead ends: 2214 [2021-05-22 01:31:44,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-05-22 01:31:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1892. [2021-05-22 01:31:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1875 states have (on average 3.2672) internal successors, (6126), 1891 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6126 transitions. [2021-05-22 01:31:44,879 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6126 transitions. Word has length 7 [2021-05-22 01:31:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:44,879 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6126 transitions. [2021-05-22 01:31:44,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6126 transitions. [2021-05-22 01:31:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:31:44,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:44,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:44,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 01:31:44,880 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -590723727, now seen corresponding path program 1 times [2021-05-22 01:31:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:44,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799646084] [2021-05-22 01:31:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:44,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:44,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799646084] [2021-05-22 01:31:44,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799646084] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:44,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:44,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:44,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356728163] [2021-05-22 01:31:44,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:44,894 INFO L87 Difference]: Start difference. First operand 1892 states and 6126 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:44,977 INFO L93 Difference]: Finished difference Result 2406 states and 7618 transitions. [2021-05-22 01:31:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-22 01:31:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,009 INFO L225 Difference]: With dead ends: 2406 [2021-05-22 01:31:45,009 INFO L226 Difference]: Without dead ends: 2336 [2021-05-22 01:31:45,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-05-22 01:31:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2040. [2021-05-22 01:31:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2024 states have (on average 3.2322134387351777) internal successors, (6542), 2039 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 6542 transitions. [2021-05-22 01:31:45,079 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 6542 transitions. Word has length 8 [2021-05-22 01:31:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:45,079 INFO L482 AbstractCegarLoop]: Abstraction has 2040 states and 6542 transitions. [2021-05-22 01:31:45,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 6542 transitions. [2021-05-22 01:31:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-22 01:31:45,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:45,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:45,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 01:31:45,082 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -653505140, now seen corresponding path program 1 times [2021-05-22 01:31:45,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:45,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843800391] [2021-05-22 01:31:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:45,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:45,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843800391] [2021-05-22 01:31:45,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843800391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:45,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:45,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:45,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600736312] [2021-05-22 01:31:45,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:45,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:45,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:45,112 INFO L87 Difference]: Start difference. First operand 2040 states and 6542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:45,164 INFO L93 Difference]: Finished difference Result 2316 states and 7182 transitions. [2021-05-22 01:31:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:45,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-22 01:31:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,176 INFO L225 Difference]: With dead ends: 2316 [2021-05-22 01:31:45,177 INFO L226 Difference]: Without dead ends: 2252 [2021-05-22 01:31:45,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-05-22 01:31:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2036. [2021-05-22 01:31:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2022 states have (on average 3.1444114737883284) internal successors, (6358), 2035 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 6358 transitions. [2021-05-22 01:31:45,242 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 6358 transitions. Word has length 9 [2021-05-22 01:31:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:45,242 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 6358 transitions. [2021-05-22 01:31:45,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 6358 transitions. [2021-05-22 01:31:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:45,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:45,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:45,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 01:31:45,244 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1769361568, now seen corresponding path program 1 times [2021-05-22 01:31:45,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:45,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378496712] [2021-05-22 01:31:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:45,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:45,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378496712] [2021-05-22 01:31:45,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378496712] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:45,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:45,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123366011] [2021-05-22 01:31:45,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:45,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:45,267 INFO L87 Difference]: Start difference. First operand 2036 states and 6358 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:45,350 INFO L93 Difference]: Finished difference Result 3194 states and 9580 transitions. [2021-05-22 01:31:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,367 INFO L225 Difference]: With dead ends: 3194 [2021-05-22 01:31:45,367 INFO L226 Difference]: Without dead ends: 3072 [2021-05-22 01:31:45,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-05-22 01:31:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2194. [2021-05-22 01:31:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2180 states have (on average 3.173394495412844) internal successors, (6918), 2193 states have internal predecessors, (6918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6918 transitions. [2021-05-22 01:31:45,448 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6918 transitions. Word has length 11 [2021-05-22 01:31:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:45,449 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6918 transitions. [2021-05-22 01:31:45,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6918 transitions. [2021-05-22 01:31:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:45,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:45,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:45,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 01:31:45,452 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1621751968, now seen corresponding path program 2 times [2021-05-22 01:31:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:45,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537965994] [2021-05-22 01:31:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:45,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537965994] [2021-05-22 01:31:45,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537965994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:45,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:45,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:31:45,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383101830] [2021-05-22 01:31:45,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:45,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:45,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:45,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:45,479 INFO L87 Difference]: Start difference. First operand 2194 states and 6918 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:45,496 INFO L93 Difference]: Finished difference Result 1050 states and 2850 transitions. [2021-05-22 01:31:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,503 INFO L225 Difference]: With dead ends: 1050 [2021-05-22 01:31:45,503 INFO L226 Difference]: Without dead ends: 1036 [2021-05-22 01:31:45,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-05-22 01:31:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2021-05-22 01:31:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1023 states have (on average 2.7507331378299122) internal successors, (2814), 1035 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2814 transitions. [2021-05-22 01:31:45,546 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2814 transitions. Word has length 11 [2021-05-22 01:31:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:45,546 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2814 transitions. [2021-05-22 01:31:45,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2814 transitions. [2021-05-22 01:31:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:45,548 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:45,548 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:45,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 01:31:45,548 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash -330379410, now seen corresponding path program 1 times [2021-05-22 01:31:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679462505] [2021-05-22 01:31:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:45,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:45,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679462505] [2021-05-22 01:31:45,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679462505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:45,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:45,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:45,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42847780] [2021-05-22 01:31:45,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:45,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:45,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:45,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:45,593 INFO L87 Difference]: Start difference. First operand 1036 states and 2814 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:45,669 INFO L93 Difference]: Finished difference Result 1480 states and 3842 transitions. [2021-05-22 01:31:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,675 INFO L225 Difference]: With dead ends: 1480 [2021-05-22 01:31:45,676 INFO L226 Difference]: Without dead ends: 1391 [2021-05-22 01:31:45,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-05-22 01:31:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 931. [2021-05-22 01:31:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 919 states have (on average 2.748639825897715) internal successors, (2526), 930 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2526 transitions. [2021-05-22 01:31:45,709 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2526 transitions. Word has length 11 [2021-05-22 01:31:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:45,709 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2526 transitions. [2021-05-22 01:31:45,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2526 transitions. [2021-05-22 01:31:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:45,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:45,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:45,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 01:31:45,711 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:45,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2115727862, now seen corresponding path program 1 times [2021-05-22 01:31:45,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:45,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143370701] [2021-05-22 01:31:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143370701] [2021-05-22 01:31:45,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143370701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:45,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:45,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:45,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322465181] [2021-05-22 01:31:45,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:45,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:45,755 INFO L87 Difference]: Start difference. First operand 931 states and 2526 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:45,828 INFO L93 Difference]: Finished difference Result 1339 states and 3432 transitions. [2021-05-22 01:31:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,834 INFO L225 Difference]: With dead ends: 1339 [2021-05-22 01:31:45,834 INFO L226 Difference]: Without dead ends: 1259 [2021-05-22 01:31:45,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-05-22 01:31:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 883. [2021-05-22 01:31:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 871 states have (on average 2.6681974741676235) internal successors, (2324), 882 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2324 transitions. [2021-05-22 01:31:45,886 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2324 transitions. Word has length 12 [2021-05-22 01:31:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:45,887 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 2324 transitions. [2021-05-22 01:31:45,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2324 transitions. [2021-05-22 01:31:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:45,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:45,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:45,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 01:31:45,888 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -901489645, now seen corresponding path program 1 times [2021-05-22 01:31:45,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:45,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541936759] [2021-05-22 01:31:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:45,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:45,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541936759] [2021-05-22 01:31:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541936759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:45,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:45,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588859089] [2021-05-22 01:31:45,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:45,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:45,911 INFO L87 Difference]: Start difference. First operand 883 states and 2324 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:45,980 INFO L93 Difference]: Finished difference Result 1155 states and 2891 transitions. [2021-05-22 01:31:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:45,985 INFO L225 Difference]: With dead ends: 1155 [2021-05-22 01:31:45,985 INFO L226 Difference]: Without dead ends: 1075 [2021-05-22 01:31:45,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-22 01:31:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 799. [2021-05-22 01:31:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 789 states have (on average 2.5640050697084917) internal successors, (2023), 798 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2023 transitions. [2021-05-22 01:31:46,006 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2023 transitions. Word has length 12 [2021-05-22 01:31:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,007 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2023 transitions. [2021-05-22 01:31:46,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2023 transitions. [2021-05-22 01:31:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:46,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,008 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 01:31:46,008 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 515297854, now seen corresponding path program 1 times [2021-05-22 01:31:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472599220] [2021-05-22 01:31:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472599220] [2021-05-22 01:31:46,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472599220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759166857] [2021-05-22 01:31:46,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:46,029 INFO L87 Difference]: Start difference. First operand 799 states and 2023 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,082 INFO L93 Difference]: Finished difference Result 955 states and 2304 transitions. [2021-05-22 01:31:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,085 INFO L225 Difference]: With dead ends: 955 [2021-05-22 01:31:46,085 INFO L226 Difference]: Without dead ends: 873 [2021-05-22 01:31:46,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-05-22 01:31:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 681. [2021-05-22 01:31:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 673 states have (on average 2.4799405646359585) internal successors, (1669), 680 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1669 transitions. [2021-05-22 01:31:46,102 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1669 transitions. Word has length 12 [2021-05-22 01:31:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,103 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1669 transitions. [2021-05-22 01:31:46,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1669 transitions. [2021-05-22 01:31:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:46,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 01:31:46,103 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash 515513335, now seen corresponding path program 1 times [2021-05-22 01:31:46,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623174768] [2021-05-22 01:31:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623174768] [2021-05-22 01:31:46,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623174768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150366463] [2021-05-22 01:31:46,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:46,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:46,126 INFO L87 Difference]: Start difference. First operand 681 states and 1669 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,179 INFO L93 Difference]: Finished difference Result 843 states and 1948 transitions. [2021-05-22 01:31:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,181 INFO L225 Difference]: With dead ends: 843 [2021-05-22 01:31:46,181 INFO L226 Difference]: Without dead ends: 763 [2021-05-22 01:31:46,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-05-22 01:31:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 598. [2021-05-22 01:31:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 592 states have (on average 2.3412162162162162) internal successors, (1386), 597 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1386 transitions. [2021-05-22 01:31:46,195 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1386 transitions. Word has length 12 [2021-05-22 01:31:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,195 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1386 transitions. [2021-05-22 01:31:46,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1386 transitions. [2021-05-22 01:31:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:31:46,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 01:31:46,196 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1824347916, now seen corresponding path program 1 times [2021-05-22 01:31:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249079420] [2021-05-22 01:31:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249079420] [2021-05-22 01:31:46,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249079420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:46,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926118234] [2021-05-22 01:31:46,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:31:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:31:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,230 INFO L87 Difference]: Start difference. First operand 598 states and 1386 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,320 INFO L93 Difference]: Finished difference Result 703 states and 1579 transitions. [2021-05-22 01:31:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:31:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:31:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,326 INFO L225 Difference]: With dead ends: 703 [2021-05-22 01:31:46,326 INFO L226 Difference]: Without dead ends: 625 [2021-05-22 01:31:46,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 01:31:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-22 01:31:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 523. [2021-05-22 01:31:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 517 states have (on average 2.3307543520309477) internal successors, (1205), 522 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1205 transitions. [2021-05-22 01:31:46,339 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1205 transitions. Word has length 16 [2021-05-22 01:31:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,339 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1205 transitions. [2021-05-22 01:31:46,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1205 transitions. [2021-05-22 01:31:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:31:46,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 01:31:46,340 INFO L430 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1053616386, now seen corresponding path program 1 times [2021-05-22 01:31:46,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368018942] [2021-05-22 01:31:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368018942] [2021-05-22 01:31:46,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368018942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:46,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483796449] [2021-05-22 01:31:46,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:31:46,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:31:46,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,389 INFO L87 Difference]: Start difference. First operand 523 states and 1205 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,486 INFO L93 Difference]: Finished difference Result 589 states and 1312 transitions. [2021-05-22 01:31:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:31:46,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:31:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,487 INFO L225 Difference]: With dead ends: 589 [2021-05-22 01:31:46,487 INFO L226 Difference]: Without dead ends: 501 [2021-05-22 01:31:46,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 01:31:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-05-22 01:31:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 399. [2021-05-22 01:31:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 395 states have (on average 2.3341772151898734) internal successors, (922), 398 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 922 transitions. [2021-05-22 01:31:46,498 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 922 transitions. Word has length 16 [2021-05-22 01:31:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 922 transitions. [2021-05-22 01:31:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 922 transitions. [2021-05-22 01:31:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:31:46,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,500 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 01:31:46,500 INFO L430 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1859775061, now seen corresponding path program 1 times [2021-05-22 01:31:46,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975303666] [2021-05-22 01:31:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975303666] [2021-05-22 01:31:46,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975303666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:46,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206365318] [2021-05-22 01:31:46,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:31:46,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:31:46,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,546 INFO L87 Difference]: Start difference. First operand 399 states and 922 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,631 INFO L93 Difference]: Finished difference Result 441 states and 983 transitions. [2021-05-22 01:31:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:31:46,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:31:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,632 INFO L225 Difference]: With dead ends: 441 [2021-05-22 01:31:46,632 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 01:31:46,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 01:31:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 01:31:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 324. [2021-05-22 01:31:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 320 states have (on average 2.315625) internal successors, (741), 323 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 741 transitions. [2021-05-22 01:31:46,640 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 741 transitions. Word has length 16 [2021-05-22 01:31:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,640 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 741 transitions. [2021-05-22 01:31:46,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 741 transitions. [2021-05-22 01:31:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:31:46,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,641 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 01:31:46,641 INFO L430 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 420792910, now seen corresponding path program 1 times [2021-05-22 01:31:46,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128613544] [2021-05-22 01:31:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128613544] [2021-05-22 01:31:46,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128613544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:46,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258017699] [2021-05-22 01:31:46,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:31:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:31:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,689 INFO L87 Difference]: Start difference. First operand 324 states and 741 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,767 INFO L93 Difference]: Finished difference Result 351 states and 762 transitions. [2021-05-22 01:31:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:31:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:31:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,769 INFO L225 Difference]: With dead ends: 351 [2021-05-22 01:31:46,770 INFO L226 Difference]: Without dead ends: 259 [2021-05-22 01:31:46,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 01:31:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-22 01:31:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-05-22 01:31:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 2.3195876288659796) internal successors, (450), 195 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 450 transitions. [2021-05-22 01:31:46,776 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 450 transitions. Word has length 16 [2021-05-22 01:31:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,776 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 450 transitions. [2021-05-22 01:31:46,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 450 transitions. [2021-05-22 01:31:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:31:46,777 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 01:31:46,777 INFO L430 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1726310969, now seen corresponding path program 1 times [2021-05-22 01:31:46,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324216104] [2021-05-22 01:31:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324216104] [2021-05-22 01:31:46,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324216104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:46,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395458074] [2021-05-22 01:31:46,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:31:46,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:31:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,818 INFO L87 Difference]: Start difference. First operand 196 states and 450 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:46,919 INFO L93 Difference]: Finished difference Result 199 states and 425 transitions. [2021-05-22 01:31:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:31:46,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:31:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:46,920 INFO L225 Difference]: With dead ends: 199 [2021-05-22 01:31:46,920 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 01:31:46,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 01:31:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 01:31:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-22 01:31:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 2.248) internal successors, (281), 126 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 281 transitions. [2021-05-22 01:31:46,923 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 281 transitions. Word has length 16 [2021-05-22 01:31:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:46,924 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 281 transitions. [2021-05-22 01:31:46,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 281 transitions. [2021-05-22 01:31:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:31:46,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:46,924 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 01:31:46,924 INFO L430 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1129674176, now seen corresponding path program 1 times [2021-05-22 01:31:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506795531] [2021-05-22 01:31:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:46,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:46,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506795531] [2021-05-22 01:31:46,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506795531] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:46,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:46,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:31:46,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469875894] [2021-05-22 01:31:46,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:31:46,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:46,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:31:46,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:46,965 INFO L87 Difference]: Start difference. First operand 127 states and 281 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:47,018 INFO L93 Difference]: Finished difference Result 91 states and 170 transitions. [2021-05-22 01:31:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 01:31:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:31:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:47,019 INFO L225 Difference]: With dead ends: 91 [2021-05-22 01:31:47,019 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:31:47,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-22 01:31:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:31:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:31:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:31:47,020 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-05-22 01:31:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:47,020 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:31:47,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:31:47,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:31:47,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 01:31:47,020 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:31:47,021 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:31:47,021 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:47,021 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:47,021 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:47,021 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:47,021 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:47,021 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:47,022 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:47,022 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:31:47,022 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 75 flow [2021-05-22 01:31:47,077 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-05-22 01:31:47,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:47,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-05-22 01:31:47,079 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:31:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 92537823, now seen corresponding path program 1 times [2021-05-22 01:31:47,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:47,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808588069] [2021-05-22 01:31:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:47,082 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:31:47,083 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:31:47,083 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:31:47,084 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:31:47,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 01:31:47,084 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:31:47,084 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:31:47,084 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-05-22 01:31:47,089 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,090 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,091 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,092 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,093 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,094 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,095 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,095 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,096 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:31:47,097 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:31:47,097 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-22 01:31:47,098 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:31:47,098 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:31:47,098 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:31:47,098 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:31:47,098 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:31:47,098 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:31:47,098 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:31:47,098 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:31:47,099 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-22 01:31:48,213 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-22 01:31:48,238 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:48,238 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:48,238 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:48,238 INFO L82 PathProgramCache]: Analyzing trace with hash 952955632, now seen corresponding path program 1 times [2021-05-22 01:31:48,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:48,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073216178] [2021-05-22 01:31:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:48,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:48,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073216178] [2021-05-22 01:31:48,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073216178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:48,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:48,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:48,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120988743] [2021-05-22 01:31:48,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:48,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:48,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:48,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:48,278 INFO L87 Difference]: Start difference. First operand has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:48,454 INFO L93 Difference]: Finished difference Result 19652 states and 79850 transitions. [2021-05-22 01:31:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:48,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-05-22 01:31:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:48,545 INFO L225 Difference]: With dead ends: 19652 [2021-05-22 01:31:48,545 INFO L226 Difference]: Without dead ends: 19374 [2021-05-22 01:31:48,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19374 states. [2021-05-22 01:31:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19374 to 16284. [2021-05-22 01:31:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16284 states, 16244 states have (on average 4.135249938438808) internal successors, (67173), 16283 states have internal predecessors, (67173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16284 states to 16284 states and 67173 transitions. [2021-05-22 01:31:49,616 INFO L78 Accepts]: Start accepts. Automaton has 16284 states and 67173 transitions. Word has length 7 [2021-05-22 01:31:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:49,617 INFO L482 AbstractCegarLoop]: Abstraction has 16284 states and 67173 transitions. [2021-05-22 01:31:49,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 16284 states and 67173 transitions. [2021-05-22 01:31:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:31:49,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:49,618 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:49,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 01:31:49,618 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:49,619 INFO L82 PathProgramCache]: Analyzing trace with hash 141049944, now seen corresponding path program 1 times [2021-05-22 01:31:49,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:49,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259306239] [2021-05-22 01:31:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:49,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:49,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259306239] [2021-05-22 01:31:49,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259306239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:49,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:49,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:49,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546857091] [2021-05-22 01:31:49,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:49,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:49,628 INFO L87 Difference]: Start difference. First operand 16284 states and 67173 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:49,893 INFO L93 Difference]: Finished difference Result 22590 states and 91851 transitions. [2021-05-22 01:31:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:49,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-22 01:31:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:50,108 INFO L225 Difference]: With dead ends: 22590 [2021-05-22 01:31:50,108 INFO L226 Difference]: Without dead ends: 22440 [2021-05-22 01:31:50,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22440 states. [2021-05-22 01:31:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22440 to 18864. [2021-05-22 01:31:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18864 states, 18825 states have (on average 4.135298804780876) internal successors, (77847), 18863 states have internal predecessors, (77847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18864 states to 18864 states and 77847 transitions. [2021-05-22 01:31:50,898 INFO L78 Accepts]: Start accepts. Automaton has 18864 states and 77847 transitions. Word has length 8 [2021-05-22 01:31:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:50,898 INFO L482 AbstractCegarLoop]: Abstraction has 18864 states and 77847 transitions. [2021-05-22 01:31:50,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 18864 states and 77847 transitions. [2021-05-22 01:31:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-22 01:31:50,899 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:50,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:50,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 01:31:50,900 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 549962088, now seen corresponding path program 1 times [2021-05-22 01:31:50,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:50,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967012226] [2021-05-22 01:31:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:50,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:50,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967012226] [2021-05-22 01:31:50,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967012226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:50,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:50,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:50,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344530722] [2021-05-22 01:31:50,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:50,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:50,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:50,915 INFO L87 Difference]: Start difference. First operand 18864 states and 77847 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:51,219 INFO L93 Difference]: Finished difference Result 24868 states and 100763 transitions. [2021-05-22 01:31:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-22 01:31:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:51,316 INFO L225 Difference]: With dead ends: 24868 [2021-05-22 01:31:51,316 INFO L226 Difference]: Without dead ends: 24728 [2021-05-22 01:31:51,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24728 states. [2021-05-22 01:31:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24728 to 20864. [2021-05-22 01:31:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20864 states, 20826 states have (on average 4.119033899932776) internal successors, (85783), 20863 states have internal predecessors, (85783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20864 states to 20864 states and 85783 transitions. [2021-05-22 01:31:52,194 INFO L78 Accepts]: Start accepts. Automaton has 20864 states and 85783 transitions. Word has length 9 [2021-05-22 01:31:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:52,194 INFO L482 AbstractCegarLoop]: Abstraction has 20864 states and 85783 transitions. [2021-05-22 01:31:52,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 20864 states and 85783 transitions. [2021-05-22 01:31:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 01:31:52,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:52,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:52,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 01:31:52,196 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash 804174590, now seen corresponding path program 1 times [2021-05-22 01:31:52,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:52,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551060544] [2021-05-22 01:31:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:31:52,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:52,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551060544] [2021-05-22 01:31:52,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551060544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:52,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:52,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:31:52,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823268711] [2021-05-22 01:31:52,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:52,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:52,205 INFO L87 Difference]: Start difference. First operand 20864 states and 85783 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:52,534 INFO L93 Difference]: Finished difference Result 25664 states and 103119 transitions. [2021-05-22 01:31:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:52,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-22 01:31:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:52,606 INFO L225 Difference]: With dead ends: 25664 [2021-05-22 01:31:52,606 INFO L226 Difference]: Without dead ends: 25536 [2021-05-22 01:31:52,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25536 states. [2021-05-22 01:31:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25536 to 21864. [2021-05-22 01:31:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21864 states, 21828 states have (on average 4.08076782114715) internal successors, (89075), 21863 states have internal predecessors, (89075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21864 states to 21864 states and 89075 transitions. [2021-05-22 01:31:53,470 INFO L78 Accepts]: Start accepts. Automaton has 21864 states and 89075 transitions. Word has length 10 [2021-05-22 01:31:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:53,470 INFO L482 AbstractCegarLoop]: Abstraction has 21864 states and 89075 transitions. [2021-05-22 01:31:53,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 21864 states and 89075 transitions. [2021-05-22 01:31:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:53,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:53,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:53,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 01:31:53,473 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1400865855, now seen corresponding path program 1 times [2021-05-22 01:31:53,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:53,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351682121] [2021-05-22 01:31:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:53,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:53,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351682121] [2021-05-22 01:31:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351682121] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:53,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:53,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:53,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109789990] [2021-05-22 01:31:53,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:53,499 INFO L87 Difference]: Start difference. First operand 21864 states and 89075 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:54,065 INFO L93 Difference]: Finished difference Result 38802 states and 151963 transitions. [2021-05-22 01:31:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:54,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:54,171 INFO L225 Difference]: With dead ends: 38802 [2021-05-22 01:31:54,171 INFO L226 Difference]: Without dead ends: 38488 [2021-05-22 01:31:54,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38488 states. [2021-05-22 01:31:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38488 to 24398. [2021-05-22 01:31:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24398 states, 24362 states have (on average 4.135908381906248) internal successors, (100759), 24397 states have internal predecessors, (100759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24398 states to 24398 states and 100759 transitions. [2021-05-22 01:31:55,083 INFO L78 Accepts]: Start accepts. Automaton has 24398 states and 100759 transitions. Word has length 11 [2021-05-22 01:31:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:55,083 INFO L482 AbstractCegarLoop]: Abstraction has 24398 states and 100759 transitions. [2021-05-22 01:31:55,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24398 states and 100759 transitions. [2021-05-22 01:31:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:55,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:55,085 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:55,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 01:31:55,085 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1335883295, now seen corresponding path program 2 times [2021-05-22 01:31:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313665215] [2021-05-22 01:31:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:31:55,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313665215] [2021-05-22 01:31:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313665215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:55,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:55,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:31:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064170034] [2021-05-22 01:31:55,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:31:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:31:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:55,104 INFO L87 Difference]: Start difference. First operand 24398 states and 100759 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:55,150 INFO L93 Difference]: Finished difference Result 9368 states and 33520 transitions. [2021-05-22 01:31:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:31:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:55,171 INFO L225 Difference]: With dead ends: 9368 [2021-05-22 01:31:55,171 INFO L226 Difference]: Without dead ends: 9338 [2021-05-22 01:31:55,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:31:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-05-22 01:31:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 9338. [2021-05-22 01:31:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9303 states have (on average 3.5893797699666776) internal successors, (33392), 9337 states have internal predecessors, (33392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 33392 transitions. [2021-05-22 01:31:55,591 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 33392 transitions. Word has length 11 [2021-05-22 01:31:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:55,591 INFO L482 AbstractCegarLoop]: Abstraction has 9338 states and 33392 transitions. [2021-05-22 01:31:55,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 33392 transitions. [2021-05-22 01:31:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:31:55,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:55,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:55,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 01:31:55,592 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1540654737, now seen corresponding path program 1 times [2021-05-22 01:31:55,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:55,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447025098] [2021-05-22 01:31:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:55,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447025098] [2021-05-22 01:31:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447025098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:55,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:55,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:55,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540451812] [2021-05-22 01:31:55,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:55,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:55,620 INFO L87 Difference]: Start difference. First operand 9338 states and 33392 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:55,756 INFO L93 Difference]: Finished difference Result 16546 states and 57127 transitions. [2021-05-22 01:31:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:55,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:31:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:55,793 INFO L225 Difference]: With dead ends: 16546 [2021-05-22 01:31:55,793 INFO L226 Difference]: Without dead ends: 16329 [2021-05-22 01:31:55,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-05-22 01:31:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 9435. [2021-05-22 01:31:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9435 states, 9401 states have (on average 3.6195085629188384) internal successors, (34027), 9434 states have internal predecessors, (34027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9435 states to 9435 states and 34027 transitions. [2021-05-22 01:31:56,033 INFO L78 Accepts]: Start accepts. Automaton has 9435 states and 34027 transitions. Word has length 11 [2021-05-22 01:31:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:56,033 INFO L482 AbstractCegarLoop]: Abstraction has 9435 states and 34027 transitions. [2021-05-22 01:31:56,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9435 states and 34027 transitions. [2021-05-22 01:31:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:56,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:56,034 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:56,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 01:31:56,034 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash 492406963, now seen corresponding path program 1 times [2021-05-22 01:31:56,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:56,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570194144] [2021-05-22 01:31:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:31:56,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:56,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570194144] [2021-05-22 01:31:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570194144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:56,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:56,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62888833] [2021-05-22 01:31:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:56,052 INFO L87 Difference]: Start difference. First operand 9435 states and 34027 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:56,321 INFO L93 Difference]: Finished difference Result 17027 states and 59322 transitions. [2021-05-22 01:31:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:56,359 INFO L225 Difference]: With dead ends: 17027 [2021-05-22 01:31:56,360 INFO L226 Difference]: Without dead ends: 16835 [2021-05-22 01:31:56,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16835 states. [2021-05-22 01:31:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16835 to 9849. [2021-05-22 01:31:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9815 states have (on average 3.6466632705043303) internal successors, (35792), 9848 states have internal predecessors, (35792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 35792 transitions. [2021-05-22 01:31:56,648 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 35792 transitions. Word has length 12 [2021-05-22 01:31:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:56,649 INFO L482 AbstractCegarLoop]: Abstraction has 9849 states and 35792 transitions. [2021-05-22 01:31:56,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 35792 transitions. [2021-05-22 01:31:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:56,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:56,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:56,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 01:31:56,650 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1723674168, now seen corresponding path program 1 times [2021-05-22 01:31:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:56,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409961331] [2021-05-22 01:31:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:56,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:56,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409961331] [2021-05-22 01:31:56,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409961331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:56,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:56,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:56,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863059142] [2021-05-22 01:31:56,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:56,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:56,687 INFO L87 Difference]: Start difference. First operand 9849 states and 35792 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:56,853 INFO L93 Difference]: Finished difference Result 17131 states and 59960 transitions. [2021-05-22 01:31:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:56,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:56,893 INFO L225 Difference]: With dead ends: 17131 [2021-05-22 01:31:56,893 INFO L226 Difference]: Without dead ends: 16939 [2021-05-22 01:31:56,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16939 states. [2021-05-22 01:31:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16939 to 10081. [2021-05-22 01:31:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 10048 states have (on average 3.65843949044586) internal successors, (36760), 10080 states have internal predecessors, (36760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 36760 transitions. [2021-05-22 01:31:57,187 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 36760 transitions. Word has length 12 [2021-05-22 01:31:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:57,187 INFO L482 AbstractCegarLoop]: Abstraction has 10081 states and 36760 transitions. [2021-05-22 01:31:57,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 36760 transitions. [2021-05-22 01:31:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:57,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:57,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:57,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 01:31:57,188 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1379465051, now seen corresponding path program 1 times [2021-05-22 01:31:57,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:57,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980366826] [2021-05-22 01:31:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:57,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:57,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980366826] [2021-05-22 01:31:57,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980366826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:57,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:57,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:57,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961987698] [2021-05-22 01:31:57,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:57,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:57,210 INFO L87 Difference]: Start difference. First operand 10081 states and 36760 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:57,418 INFO L93 Difference]: Finished difference Result 16933 states and 59405 transitions. [2021-05-22 01:31:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:57,457 INFO L225 Difference]: With dead ends: 16933 [2021-05-22 01:31:57,457 INFO L226 Difference]: Without dead ends: 16727 [2021-05-22 01:31:57,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16727 states. [2021-05-22 01:31:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16727 to 10169. [2021-05-22 01:31:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10169 states, 10137 states have (on average 3.6744598993785145) internal successors, (37248), 10168 states have internal predecessors, (37248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10169 states to 10169 states and 37248 transitions. [2021-05-22 01:31:57,716 INFO L78 Accepts]: Start accepts. Automaton has 10169 states and 37248 transitions. Word has length 12 [2021-05-22 01:31:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:57,716 INFO L482 AbstractCegarLoop]: Abstraction has 10169 states and 37248 transitions. [2021-05-22 01:31:57,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10169 states and 37248 transitions. [2021-05-22 01:31:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 01:31:57,717 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:57,717 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:57,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 01:31:57,717 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1379249570, now seen corresponding path program 1 times [2021-05-22 01:31:57,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:57,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552578727] [2021-05-22 01:31:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:57,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:57,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552578727] [2021-05-22 01:31:57,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552578727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:57,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:57,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:57,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17715600] [2021-05-22 01:31:57,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:57,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:57,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:57,743 INFO L87 Difference]: Start difference. First operand 10169 states and 37248 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:57,897 INFO L93 Difference]: Finished difference Result 17271 states and 60491 transitions. [2021-05-22 01:31:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 01:31:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:57,932 INFO L225 Difference]: With dead ends: 17271 [2021-05-22 01:31:57,932 INFO L226 Difference]: Without dead ends: 17065 [2021-05-22 01:31:57,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17065 states. [2021-05-22 01:31:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17065 to 10364. [2021-05-22 01:31:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10333 states have (on average 3.6658279299332235) internal successors, (37879), 10363 states have internal predecessors, (37879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 37879 transitions. [2021-05-22 01:31:58,328 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 37879 transitions. Word has length 12 [2021-05-22 01:31:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:58,329 INFO L482 AbstractCegarLoop]: Abstraction has 10364 states and 37879 transitions. [2021-05-22 01:31:58,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 37879 transitions. [2021-05-22 01:31:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 01:31:58,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:58,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:58,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 01:31:58,331 INFO L430 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1885085127, now seen corresponding path program 1 times [2021-05-22 01:31:58,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:58,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696125825] [2021-05-22 01:31:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:58,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:58,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696125825] [2021-05-22 01:31:58,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696125825] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:58,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:58,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:58,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209770642] [2021-05-22 01:31:58,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:58,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:58,365 INFO L87 Difference]: Start difference. First operand 10364 states and 37879 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:58,527 INFO L93 Difference]: Finished difference Result 17252 states and 60269 transitions. [2021-05-22 01:31:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 01:31:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:58,564 INFO L225 Difference]: With dead ends: 17252 [2021-05-22 01:31:58,564 INFO L226 Difference]: Without dead ends: 17026 [2021-05-22 01:31:58,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17026 states. [2021-05-22 01:31:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17026 to 10606. [2021-05-22 01:31:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10606 states, 10575 states have (on average 3.640189125295508) internal successors, (38495), 10605 states have internal predecessors, (38495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10606 states to 10606 states and 38495 transitions. [2021-05-22 01:31:58,817 INFO L78 Accepts]: Start accepts. Automaton has 10606 states and 38495 transitions. Word has length 13 [2021-05-22 01:31:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:58,817 INFO L482 AbstractCegarLoop]: Abstraction has 10606 states and 38495 transitions. [2021-05-22 01:31:58,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10606 states and 38495 transitions. [2021-05-22 01:31:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 01:31:58,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:58,818 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:58,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 01:31:58,819 INFO L430 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1954923196, now seen corresponding path program 1 times [2021-05-22 01:31:58,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:58,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84352759] [2021-05-22 01:31:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:31:58,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:58,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84352759] [2021-05-22 01:31:58,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84352759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:58,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:58,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:58,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718611733] [2021-05-22 01:31:58,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:58,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:58,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:58,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:58,840 INFO L87 Difference]: Start difference. First operand 10606 states and 38495 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:58,999 INFO L93 Difference]: Finished difference Result 17258 states and 59809 transitions. [2021-05-22 01:31:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 01:31:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:59,040 INFO L225 Difference]: With dead ends: 17258 [2021-05-22 01:31:59,041 INFO L226 Difference]: Without dead ends: 17032 [2021-05-22 01:31:59,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17032 states. [2021-05-22 01:31:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17032 to 10702. [2021-05-22 01:31:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10702 states, 10671 states have (on average 3.6049105051073003) internal successors, (38468), 10701 states have internal predecessors, (38468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 38468 transitions. [2021-05-22 01:31:59,421 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 38468 transitions. Word has length 13 [2021-05-22 01:31:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:59,421 INFO L482 AbstractCegarLoop]: Abstraction has 10702 states and 38468 transitions. [2021-05-22 01:31:59,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 38468 transitions. [2021-05-22 01:31:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 01:31:59,423 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:59,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:59,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 01:31:59,423 INFO L430 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1754342774, now seen corresponding path program 1 times [2021-05-22 01:31:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:59,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058884089] [2021-05-22 01:31:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:31:59,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:59,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058884089] [2021-05-22 01:31:59,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058884089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:59,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:59,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413305885] [2021-05-22 01:31:59,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:59,448 INFO L87 Difference]: Start difference. First operand 10702 states and 38468 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:31:59,577 INFO L93 Difference]: Finished difference Result 16924 states and 57997 transitions. [2021-05-22 01:31:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:31:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 01:31:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:31:59,610 INFO L225 Difference]: With dead ends: 16924 [2021-05-22 01:31:59,610 INFO L226 Difference]: Without dead ends: 16698 [2021-05-22 01:31:59,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:31:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2021-05-22 01:31:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10604. [2021-05-22 01:31:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10604 states, 10575 states have (on average 3.5610401891252956) internal successors, (37658), 10603 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10604 states to 10604 states and 37658 transitions. [2021-05-22 01:31:59,854 INFO L78 Accepts]: Start accepts. Automaton has 10604 states and 37658 transitions. Word has length 13 [2021-05-22 01:31:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:31:59,854 INFO L482 AbstractCegarLoop]: Abstraction has 10604 states and 37658 transitions. [2021-05-22 01:31:59,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:31:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10604 states and 37658 transitions. [2021-05-22 01:31:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 01:31:59,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:31:59,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:31:59,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 01:31:59,856 INFO L430 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:31:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:31:59,857 INFO L82 PathProgramCache]: Analyzing trace with hash -162786407, now seen corresponding path program 1 times [2021-05-22 01:31:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:31:59,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216072717] [2021-05-22 01:31:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:31:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:31:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:31:59,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:31:59,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216072717] [2021-05-22 01:31:59,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216072717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:31:59,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:31:59,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:31:59,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129495074] [2021-05-22 01:31:59,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:31:59,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:31:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:31:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:31:59,883 INFO L87 Difference]: Start difference. First operand 10604 states and 37658 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:00,036 INFO L93 Difference]: Finished difference Result 15962 states and 53962 transitions. [2021-05-22 01:32:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:32:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 01:32:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:00,067 INFO L225 Difference]: With dead ends: 15962 [2021-05-22 01:32:00,067 INFO L226 Difference]: Without dead ends: 15736 [2021-05-22 01:32:00,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15736 states. [2021-05-22 01:32:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15736 to 10513. [2021-05-22 01:32:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10513 states, 10486 states have (on average 3.5275605569330537) internal successors, (36990), 10512 states have internal predecessors, (36990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 36990 transitions. [2021-05-22 01:32:00,351 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 36990 transitions. Word has length 13 [2021-05-22 01:32:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:00,351 INFO L482 AbstractCegarLoop]: Abstraction has 10513 states and 36990 transitions. [2021-05-22 01:32:00,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 36990 transitions. [2021-05-22 01:32:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 01:32:00,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:00,352 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:00,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 01:32:00,352 INFO L430 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -162570926, now seen corresponding path program 1 times [2021-05-22 01:32:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:00,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124362778] [2021-05-22 01:32:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:00,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124362778] [2021-05-22 01:32:00,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124362778] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:00,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:00,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:32:00,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880973959] [2021-05-22 01:32:00,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:32:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:32:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:32:00,381 INFO L87 Difference]: Start difference. First operand 10513 states and 36990 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:00,513 INFO L93 Difference]: Finished difference Result 16030 states and 53631 transitions. [2021-05-22 01:32:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:32:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 01:32:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:00,544 INFO L225 Difference]: With dead ends: 16030 [2021-05-22 01:32:00,544 INFO L226 Difference]: Without dead ends: 15804 [2021-05-22 01:32:00,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15804 states. [2021-05-22 01:32:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15804 to 10491. [2021-05-22 01:32:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10491 states, 10466 states have (on average 3.478597362889356) internal successors, (36407), 10490 states have internal predecessors, (36407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10491 states to 10491 states and 36407 transitions. [2021-05-22 01:32:00,780 INFO L78 Accepts]: Start accepts. Automaton has 10491 states and 36407 transitions. Word has length 13 [2021-05-22 01:32:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:00,780 INFO L482 AbstractCegarLoop]: Abstraction has 10491 states and 36407 transitions. [2021-05-22 01:32:00,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10491 states and 36407 transitions. [2021-05-22 01:32:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 01:32:00,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:00,782 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:00,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 01:32:00,782 INFO L430 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash -163001888, now seen corresponding path program 1 times [2021-05-22 01:32:00,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:00,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989697401] [2021-05-22 01:32:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:00,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:00,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989697401] [2021-05-22 01:32:00,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989697401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:00,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:00,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:32:00,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599762856] [2021-05-22 01:32:00,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:32:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:32:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:32:00,800 INFO L87 Difference]: Start difference. First operand 10491 states and 36407 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:00,971 INFO L93 Difference]: Finished difference Result 15882 states and 52454 transitions. [2021-05-22 01:32:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:32:00,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 01:32:00,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:01,004 INFO L225 Difference]: With dead ends: 15882 [2021-05-22 01:32:01,005 INFO L226 Difference]: Without dead ends: 15652 [2021-05-22 01:32:01,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2021-05-22 01:32:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 10372. [2021-05-22 01:32:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10372 states, 10349 states have (on average 3.415209198956421) internal successors, (35344), 10371 states have internal predecessors, (35344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10372 states to 10372 states and 35344 transitions. [2021-05-22 01:32:01,297 INFO L78 Accepts]: Start accepts. Automaton has 10372 states and 35344 transitions. Word has length 13 [2021-05-22 01:32:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:01,297 INFO L482 AbstractCegarLoop]: Abstraction has 10372 states and 35344 transitions. [2021-05-22 01:32:01,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 10372 states and 35344 transitions. [2021-05-22 01:32:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:01,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:01,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:01,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 01:32:01,302 INFO L430 AbstractCegarLoop]: === Iteration 18 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash 132899251, now seen corresponding path program 1 times [2021-05-22 01:32:01,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:01,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376091511] [2021-05-22 01:32:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:32:01,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376091511] [2021-05-22 01:32:01,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376091511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:01,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:01,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:01,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664357464] [2021-05-22 01:32:01,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:01,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:01,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:01,345 INFO L87 Difference]: Start difference. First operand 10372 states and 35344 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:01,608 INFO L93 Difference]: Finished difference Result 16633 states and 53760 transitions. [2021-05-22 01:32:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:32:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:01,641 INFO L225 Difference]: With dead ends: 16633 [2021-05-22 01:32:01,641 INFO L226 Difference]: Without dead ends: 16393 [2021-05-22 01:32:01,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2021-05-22 01:32:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 10107. [2021-05-22 01:32:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10084 states have (on average 3.4073780245934153) internal successors, (34360), 10106 states have internal predecessors, (34360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 34360 transitions. [2021-05-22 01:32:01,907 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 34360 transitions. Word has length 16 [2021-05-22 01:32:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:01,907 INFO L482 AbstractCegarLoop]: Abstraction has 10107 states and 34360 transitions. [2021-05-22 01:32:01,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 34360 transitions. [2021-05-22 01:32:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:01,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:01,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:01,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 01:32:01,910 INFO L430 AbstractCegarLoop]: === Iteration 19 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1324942823, now seen corresponding path program 1 times [2021-05-22 01:32:01,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:01,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094463705] [2021-05-22 01:32:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:32:01,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:01,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094463705] [2021-05-22 01:32:01,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094463705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:01,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:01,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:01,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855709963] [2021-05-22 01:32:01,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:01,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:01,943 INFO L87 Difference]: Start difference. First operand 10107 states and 34360 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:02,193 INFO L93 Difference]: Finished difference Result 16362 states and 52734 transitions. [2021-05-22 01:32:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:32:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:02,226 INFO L225 Difference]: With dead ends: 16362 [2021-05-22 01:32:02,226 INFO L226 Difference]: Without dead ends: 16094 [2021-05-22 01:32:02,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16094 states. [2021-05-22 01:32:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16094 to 9700. [2021-05-22 01:32:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 9678 states have (on average 3.4031824757181237) internal successors, (32936), 9699 states have internal predecessors, (32936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 32936 transitions. [2021-05-22 01:32:02,483 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 32936 transitions. Word has length 16 [2021-05-22 01:32:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:02,483 INFO L482 AbstractCegarLoop]: Abstraction has 9700 states and 32936 transitions. [2021-05-22 01:32:02,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 32936 transitions. [2021-05-22 01:32:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:02,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:02,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:02,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 01:32:02,486 INFO L430 AbstractCegarLoop]: === Iteration 20 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:02,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1598844230, now seen corresponding path program 1 times [2021-05-22 01:32:02,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:02,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509348261] [2021-05-22 01:32:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:02,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:02,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509348261] [2021-05-22 01:32:02,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509348261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:02,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:02,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:02,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531851822] [2021-05-22 01:32:02,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:02,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:02,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:02,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:02,520 INFO L87 Difference]: Start difference. First operand 9700 states and 32936 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:02,780 INFO L93 Difference]: Finished difference Result 15766 states and 50698 transitions. [2021-05-22 01:32:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:32:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:02,809 INFO L225 Difference]: With dead ends: 15766 [2021-05-22 01:32:02,809 INFO L226 Difference]: Without dead ends: 15526 [2021-05-22 01:32:02,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15526 states. [2021-05-22 01:32:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15526 to 9420. [2021-05-22 01:32:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9420 states, 9398 states have (on average 3.3940200042562245) internal successors, (31897), 9419 states have internal predecessors, (31897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 31897 transitions. [2021-05-22 01:32:03,023 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 31897 transitions. Word has length 16 [2021-05-22 01:32:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:03,023 INFO L482 AbstractCegarLoop]: Abstraction has 9420 states and 31897 transitions. [2021-05-22 01:32:03,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 31897 transitions. [2021-05-22 01:32:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:03,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:03,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:03,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 01:32:03,026 INFO L430 AbstractCegarLoop]: === Iteration 21 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1257140915, now seen corresponding path program 1 times [2021-05-22 01:32:03,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:03,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012060136] [2021-05-22 01:32:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:03,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012060136] [2021-05-22 01:32:03,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012060136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:03,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:03,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:03,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136948663] [2021-05-22 01:32:03,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:03,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:03,061 INFO L87 Difference]: Start difference. First operand 9420 states and 31897 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:03,259 INFO L93 Difference]: Finished difference Result 15174 states and 48727 transitions. [2021-05-22 01:32:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:32:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:03,288 INFO L225 Difference]: With dead ends: 15174 [2021-05-22 01:32:03,288 INFO L226 Difference]: Without dead ends: 14906 [2021-05-22 01:32:03,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14906 states. [2021-05-22 01:32:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14906 to 9013. [2021-05-22 01:32:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9013 states, 8992 states have (on average 3.3889012455516014) internal successors, (30473), 9012 states have internal predecessors, (30473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9013 states to 9013 states and 30473 transitions. [2021-05-22 01:32:03,497 INFO L78 Accepts]: Start accepts. Automaton has 9013 states and 30473 transitions. Word has length 16 [2021-05-22 01:32:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:03,498 INFO L482 AbstractCegarLoop]: Abstraction has 9013 states and 30473 transitions. [2021-05-22 01:32:03,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9013 states and 30473 transitions. [2021-05-22 01:32:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:03,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:03,500 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:03,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 01:32:03,500 INFO L430 AbstractCegarLoop]: === Iteration 22 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:03,500 INFO L82 PathProgramCache]: Analyzing trace with hash -324631072, now seen corresponding path program 1 times [2021-05-22 01:32:03,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:03,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507440555] [2021-05-22 01:32:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:03,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:03,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507440555] [2021-05-22 01:32:03,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507440555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:03,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:03,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:03,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784243064] [2021-05-22 01:32:03,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:03,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:03,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:03,540 INFO L87 Difference]: Start difference. First operand 9013 states and 30473 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:03,774 INFO L93 Difference]: Finished difference Result 14563 states and 46636 transitions. [2021-05-22 01:32:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:32:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:03,804 INFO L225 Difference]: With dead ends: 14563 [2021-05-22 01:32:03,804 INFO L226 Difference]: Without dead ends: 14323 [2021-05-22 01:32:03,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14323 states. [2021-05-22 01:32:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14323 to 8733. [2021-05-22 01:32:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 8712 states have (on average 3.378558310376492) internal successors, (29434), 8732 states have internal predecessors, (29434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 29434 transitions. [2021-05-22 01:32:04,010 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 29434 transitions. Word has length 16 [2021-05-22 01:32:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:04,010 INFO L482 AbstractCegarLoop]: Abstraction has 8733 states and 29434 transitions. [2021-05-22 01:32:04,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 29434 transitions. [2021-05-22 01:32:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 01:32:04,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:04,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:04,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 01:32:04,012 INFO L430 AbstractCegarLoop]: === Iteration 23 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1114351079, now seen corresponding path program 1 times [2021-05-22 01:32:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:04,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62493922] [2021-05-22 01:32:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:04,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:04,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62493922] [2021-05-22 01:32:04,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62493922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:04,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:04,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:04,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925454273] [2021-05-22 01:32:04,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:04,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:04,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:04,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:04,044 INFO L87 Difference]: Start difference. First operand 8733 states and 29434 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:04,259 INFO L93 Difference]: Finished difference Result 14285 states and 45591 transitions. [2021-05-22 01:32:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 01:32:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:04,287 INFO L225 Difference]: With dead ends: 14285 [2021-05-22 01:32:04,288 INFO L226 Difference]: Without dead ends: 14010 [2021-05-22 01:32:04,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14010 states. [2021-05-22 01:32:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14010 to 8307. [2021-05-22 01:32:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 8287 states have (on average 3.3733558585736696) internal successors, (27955), 8306 states have internal predecessors, (27955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 27955 transitions. [2021-05-22 01:32:04,494 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 27955 transitions. Word has length 16 [2021-05-22 01:32:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:04,494 INFO L482 AbstractCegarLoop]: Abstraction has 8307 states and 27955 transitions. [2021-05-22 01:32:04,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 27955 transitions. [2021-05-22 01:32:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:04,496 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:04,496 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:04,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 01:32:04,497 INFO L430 AbstractCegarLoop]: === Iteration 24 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash 270662139, now seen corresponding path program 1 times [2021-05-22 01:32:04,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:04,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598715520] [2021-05-22 01:32:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:32:04,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:04,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598715520] [2021-05-22 01:32:04,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598715520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:04,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:04,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:04,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582911983] [2021-05-22 01:32:04,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:04,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:04,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:04,554 INFO L87 Difference]: Start difference. First operand 8307 states and 27955 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:04,791 INFO L93 Difference]: Finished difference Result 13912 states and 44209 transitions. [2021-05-22 01:32:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:04,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:04,825 INFO L225 Difference]: With dead ends: 13912 [2021-05-22 01:32:04,825 INFO L226 Difference]: Without dead ends: 13668 [2021-05-22 01:32:04,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13668 states. [2021-05-22 01:32:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13668 to 8145. [2021-05-22 01:32:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8145 states, 8125 states have (on average 3.355323076923077) internal successors, (27262), 8144 states have internal predecessors, (27262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8145 states to 8145 states and 27262 transitions. [2021-05-22 01:32:05,043 INFO L78 Accepts]: Start accepts. Automaton has 8145 states and 27262 transitions. Word has length 17 [2021-05-22 01:32:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:05,043 INFO L482 AbstractCegarLoop]: Abstraction has 8145 states and 27262 transitions. [2021-05-22 01:32:05,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8145 states and 27262 transitions. [2021-05-22 01:32:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:05,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:05,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:05,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-22 01:32:05,045 INFO L430 AbstractCegarLoop]: === Iteration 25 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -315039173, now seen corresponding path program 1 times [2021-05-22 01:32:05,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:05,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351537422] [2021-05-22 01:32:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:05,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:05,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351537422] [2021-05-22 01:32:05,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351537422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:05,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:05,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:05,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143172844] [2021-05-22 01:32:05,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:05,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:05,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:05,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:05,076 INFO L87 Difference]: Start difference. First operand 8145 states and 27262 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:05,299 INFO L93 Difference]: Finished difference Result 13677 states and 43251 transitions. [2021-05-22 01:32:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:05,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:05,324 INFO L225 Difference]: With dead ends: 13677 [2021-05-22 01:32:05,324 INFO L226 Difference]: Without dead ends: 13433 [2021-05-22 01:32:05,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13433 states. [2021-05-22 01:32:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13433 to 8003. [2021-05-22 01:32:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 7983 states have (on average 3.3349617938118503) internal successors, (26623), 8002 states have internal predecessors, (26623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 26623 transitions. [2021-05-22 01:32:05,504 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 26623 transitions. Word has length 17 [2021-05-22 01:32:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:05,504 INFO L482 AbstractCegarLoop]: Abstraction has 8003 states and 26623 transitions. [2021-05-22 01:32:05,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 26623 transitions. [2021-05-22 01:32:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:05,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:05,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:05,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-22 01:32:05,507 INFO L430 AbstractCegarLoop]: === Iteration 26 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2063014402, now seen corresponding path program 1 times [2021-05-22 01:32:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:05,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239260294] [2021-05-22 01:32:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:05,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:05,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239260294] [2021-05-22 01:32:05,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239260294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:05,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:05,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:05,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74501588] [2021-05-22 01:32:05,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:05,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:05,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:05,546 INFO L87 Difference]: Start difference. First operand 8003 states and 26623 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:05,761 INFO L93 Difference]: Finished difference Result 13476 states and 42435 transitions. [2021-05-22 01:32:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:05,785 INFO L225 Difference]: With dead ends: 13476 [2021-05-22 01:32:05,785 INFO L226 Difference]: Without dead ends: 13228 [2021-05-22 01:32:05,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13228 states. [2021-05-22 01:32:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13228 to 7767. [2021-05-22 01:32:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7767 states, 7747 states have (on average 3.318187685555699) internal successors, (25706), 7766 states have internal predecessors, (25706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7767 states to 7767 states and 25706 transitions. [2021-05-22 01:32:05,982 INFO L78 Accepts]: Start accepts. Automaton has 7767 states and 25706 transitions. Word has length 17 [2021-05-22 01:32:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:05,982 INFO L482 AbstractCegarLoop]: Abstraction has 7767 states and 25706 transitions. [2021-05-22 01:32:05,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7767 states and 25706 transitions. [2021-05-22 01:32:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:05,984 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:05,984 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:05,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-22 01:32:05,984 INFO L430 AbstractCegarLoop]: === Iteration 27 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2062583440, now seen corresponding path program 1 times [2021-05-22 01:32:05,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:05,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702308107] [2021-05-22 01:32:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:06,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:06,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702308107] [2021-05-22 01:32:06,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702308107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:06,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:06,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:06,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329229324] [2021-05-22 01:32:06,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:06,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:06,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:06,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:06,015 INFO L87 Difference]: Start difference. First operand 7767 states and 25706 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:06,214 INFO L93 Difference]: Finished difference Result 12874 states and 40395 transitions. [2021-05-22 01:32:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:06,238 INFO L225 Difference]: With dead ends: 12874 [2021-05-22 01:32:06,238 INFO L226 Difference]: Without dead ends: 12606 [2021-05-22 01:32:06,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2021-05-22 01:32:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 7550. [2021-05-22 01:32:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7550 states, 7530 states have (on average 3.297211155378486) internal successors, (24828), 7549 states have internal predecessors, (24828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7550 states to 7550 states and 24828 transitions. [2021-05-22 01:32:06,429 INFO L78 Accepts]: Start accepts. Automaton has 7550 states and 24828 transitions. Word has length 17 [2021-05-22 01:32:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:06,429 INFO L482 AbstractCegarLoop]: Abstraction has 7550 states and 24828 transitions. [2021-05-22 01:32:06,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 7550 states and 24828 transitions. [2021-05-22 01:32:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:06,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:06,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:06,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-22 01:32:06,432 INFO L430 AbstractCegarLoop]: === Iteration 28 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1638069932, now seen corresponding path program 1 times [2021-05-22 01:32:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:06,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257798841] [2021-05-22 01:32:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:06,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:06,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257798841] [2021-05-22 01:32:06,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257798841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:06,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:06,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:06,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207937637] [2021-05-22 01:32:06,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:06,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:06,471 INFO L87 Difference]: Start difference. First operand 7550 states and 24828 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:06,678 INFO L93 Difference]: Finished difference Result 12192 states and 38125 transitions. [2021-05-22 01:32:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:06,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:06,699 INFO L225 Difference]: With dead ends: 12192 [2021-05-22 01:32:06,699 INFO L226 Difference]: Without dead ends: 11976 [2021-05-22 01:32:06,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11976 states. [2021-05-22 01:32:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11976 to 7364. [2021-05-22 01:32:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7364 states, 7344 states have (on average 3.2800925925925926) internal successors, (24089), 7363 states have internal predecessors, (24089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7364 states to 7364 states and 24089 transitions. [2021-05-22 01:32:06,891 INFO L78 Accepts]: Start accepts. Automaton has 7364 states and 24089 transitions. Word has length 17 [2021-05-22 01:32:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:06,891 INFO L482 AbstractCegarLoop]: Abstraction has 7364 states and 24089 transitions. [2021-05-22 01:32:06,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7364 states and 24089 transitions. [2021-05-22 01:32:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:06,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:06,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:06,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-22 01:32:06,894 INFO L430 AbstractCegarLoop]: === Iteration 29 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1638285413, now seen corresponding path program 1 times [2021-05-22 01:32:06,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:06,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594903172] [2021-05-22 01:32:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:06,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:06,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594903172] [2021-05-22 01:32:06,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594903172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:06,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:06,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:06,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433071527] [2021-05-22 01:32:06,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:06,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:06,925 INFO L87 Difference]: Start difference. First operand 7364 states and 24089 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:07,101 INFO L93 Difference]: Finished difference Result 11910 states and 36995 transitions. [2021-05-22 01:32:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:07,123 INFO L225 Difference]: With dead ends: 11910 [2021-05-22 01:32:07,123 INFO L226 Difference]: Without dead ends: 11682 [2021-05-22 01:32:07,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-05-22 01:32:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7181. [2021-05-22 01:32:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7181 states, 7161 states have (on average 3.2534562211981566) internal successors, (23298), 7180 states have internal predecessors, (23298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 23298 transitions. [2021-05-22 01:32:07,303 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 23298 transitions. Word has length 17 [2021-05-22 01:32:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:07,303 INFO L482 AbstractCegarLoop]: Abstraction has 7181 states and 23298 transitions. [2021-05-22 01:32:07,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 23298 transitions. [2021-05-22 01:32:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:07,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:07,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:07,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-22 01:32:07,305 INFO L430 AbstractCegarLoop]: === Iteration 30 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -221066938, now seen corresponding path program 1 times [2021-05-22 01:32:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:07,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206630534] [2021-05-22 01:32:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:07,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:07,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206630534] [2021-05-22 01:32:07,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206630534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:07,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:07,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:07,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286611727] [2021-05-22 01:32:07,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:07,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:07,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:07,356 INFO L87 Difference]: Start difference. First operand 7181 states and 23298 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:07,555 INFO L93 Difference]: Finished difference Result 11333 states and 35076 transitions. [2021-05-22 01:32:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:07,581 INFO L225 Difference]: With dead ends: 11333 [2021-05-22 01:32:07,581 INFO L226 Difference]: Without dead ends: 11057 [2021-05-22 01:32:07,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11057 states. [2021-05-22 01:32:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11057 to 6977. [2021-05-22 01:32:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6977 states, 6957 states have (on average 3.226678165876096) internal successors, (22448), 6976 states have internal predecessors, (22448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 22448 transitions. [2021-05-22 01:32:07,787 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 22448 transitions. Word has length 17 [2021-05-22 01:32:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:07,787 INFO L482 AbstractCegarLoop]: Abstraction has 6977 states and 22448 transitions. [2021-05-22 01:32:07,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 22448 transitions. [2021-05-22 01:32:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:07,789 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:07,789 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:07,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-22 01:32:07,789 INFO L430 AbstractCegarLoop]: === Iteration 31 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1660264570, now seen corresponding path program 1 times [2021-05-22 01:32:07,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:07,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361690084] [2021-05-22 01:32:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:07,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:07,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361690084] [2021-05-22 01:32:07,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361690084] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:07,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:07,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503758125] [2021-05-22 01:32:07,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:07,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:07,822 INFO L87 Difference]: Start difference. First operand 6977 states and 22448 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:08,005 INFO L93 Difference]: Finished difference Result 11793 states and 36152 transitions. [2021-05-22 01:32:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:08,025 INFO L225 Difference]: With dead ends: 11793 [2021-05-22 01:32:08,025 INFO L226 Difference]: Without dead ends: 11509 [2021-05-22 01:32:08,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2021-05-22 01:32:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6676. [2021-05-22 01:32:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6658 states have (on average 3.195253829978973) internal successors, (21274), 6675 states have internal predecessors, (21274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 21274 transitions. [2021-05-22 01:32:08,193 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 21274 transitions. Word has length 17 [2021-05-22 01:32:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:08,194 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 21274 transitions. [2021-05-22 01:32:08,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 21274 transitions. [2021-05-22 01:32:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:08,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:08,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:08,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-22 01:32:08,196 INFO L430 AbstractCegarLoop]: === Iteration 32 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -918171258, now seen corresponding path program 1 times [2021-05-22 01:32:08,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:08,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116155581] [2021-05-22 01:32:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:08,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:08,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116155581] [2021-05-22 01:32:08,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116155581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:08,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:08,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596133125] [2021-05-22 01:32:08,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:08,228 INFO L87 Difference]: Start difference. First operand 6676 states and 21274 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:08,407 INFO L93 Difference]: Finished difference Result 10874 states and 33149 transitions. [2021-05-22 01:32:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:08,425 INFO L225 Difference]: With dead ends: 10874 [2021-05-22 01:32:08,426 INFO L226 Difference]: Without dead ends: 10658 [2021-05-22 01:32:08,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-05-22 01:32:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 6469. [2021-05-22 01:32:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6451 states have (on average 3.1694310959541157) internal successors, (20446), 6468 states have internal predecessors, (20446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 20446 transitions. [2021-05-22 01:32:08,581 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 20446 transitions. Word has length 17 [2021-05-22 01:32:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:08,582 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 20446 transitions. [2021-05-22 01:32:08,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 20446 transitions. [2021-05-22 01:32:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:08,583 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:08,583 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:08,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-22 01:32:08,584 INFO L430 AbstractCegarLoop]: === Iteration 33 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash -917955777, now seen corresponding path program 1 times [2021-05-22 01:32:08,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:08,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895263590] [2021-05-22 01:32:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:08,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895263590] [2021-05-22 01:32:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895263590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:08,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:08,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623168874] [2021-05-22 01:32:08,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:08,625 INFO L87 Difference]: Start difference. First operand 6469 states and 20446 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:08,821 INFO L93 Difference]: Finished difference Result 10382 states and 31429 transitions. [2021-05-22 01:32:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:08,838 INFO L225 Difference]: With dead ends: 10382 [2021-05-22 01:32:08,838 INFO L226 Difference]: Without dead ends: 10154 [2021-05-22 01:32:08,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10154 states. [2021-05-22 01:32:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10154 to 6301. [2021-05-22 01:32:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6301 states, 6283 states have (on average 3.1356040108228553) internal successors, (19701), 6300 states have internal predecessors, (19701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6301 states to 6301 states and 19701 transitions. [2021-05-22 01:32:08,987 INFO L78 Accepts]: Start accepts. Automaton has 6301 states and 19701 transitions. Word has length 17 [2021-05-22 01:32:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:08,987 INFO L482 AbstractCegarLoop]: Abstraction has 6301 states and 19701 transitions. [2021-05-22 01:32:08,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6301 states and 19701 transitions. [2021-05-22 01:32:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:08,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:08,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:08,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-22 01:32:08,989 INFO L430 AbstractCegarLoop]: === Iteration 34 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash 498831736, now seen corresponding path program 1 times [2021-05-22 01:32:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:08,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23462318] [2021-05-22 01:32:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:09,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:09,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23462318] [2021-05-22 01:32:09,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23462318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:09,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:09,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:09,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837650400] [2021-05-22 01:32:09,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:09,022 INFO L87 Difference]: Start difference. First operand 6301 states and 19701 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:09,201 INFO L93 Difference]: Finished difference Result 9898 states and 29774 transitions. [2021-05-22 01:32:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:09,217 INFO L225 Difference]: With dead ends: 9898 [2021-05-22 01:32:09,217 INFO L226 Difference]: Without dead ends: 9622 [2021-05-22 01:32:09,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2021-05-22 01:32:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 6017. [2021-05-22 01:32:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 6001 states have (on average 3.0953174470921514) internal successors, (18575), 6016 states have internal predecessors, (18575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 18575 transitions. [2021-05-22 01:32:09,350 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 18575 transitions. Word has length 17 [2021-05-22 01:32:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:09,350 INFO L482 AbstractCegarLoop]: Abstraction has 6017 states and 18575 transitions. [2021-05-22 01:32:09,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 18575 transitions. [2021-05-22 01:32:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:09,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:09,352 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:09,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-22 01:32:09,352 INFO L430 AbstractCegarLoop]: === Iteration 35 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1938029368, now seen corresponding path program 1 times [2021-05-22 01:32:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:09,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760407258] [2021-05-22 01:32:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:09,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:09,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760407258] [2021-05-22 01:32:09,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760407258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:09,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:09,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:09,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623080207] [2021-05-22 01:32:09,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:09,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:09,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:09,391 INFO L87 Difference]: Start difference. First operand 6017 states and 18575 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:09,562 INFO L93 Difference]: Finished difference Result 9578 states and 28556 transitions. [2021-05-22 01:32:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:09,577 INFO L225 Difference]: With dead ends: 9578 [2021-05-22 01:32:09,577 INFO L226 Difference]: Without dead ends: 9302 [2021-05-22 01:32:09,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-22 01:32:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9302 states. [2021-05-22 01:32:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9302 to 5714. [2021-05-22 01:32:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5714 states, 5700 states have (on average 3.0512280701754384) internal successors, (17392), 5713 states have internal predecessors, (17392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5714 states to 5714 states and 17392 transitions. [2021-05-22 01:32:09,701 INFO L78 Accepts]: Start accepts. Automaton has 5714 states and 17392 transitions. Word has length 17 [2021-05-22 01:32:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:09,701 INFO L482 AbstractCegarLoop]: Abstraction has 5714 states and 17392 transitions. [2021-05-22 01:32:09,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5714 states and 17392 transitions. [2021-05-22 01:32:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:09,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:09,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:09,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-22 01:32:09,703 INFO L430 AbstractCegarLoop]: === Iteration 36 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash 64817492, now seen corresponding path program 1 times [2021-05-22 01:32:09,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:09,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047466663] [2021-05-22 01:32:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:09,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047466663] [2021-05-22 01:32:09,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047466663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:09,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:09,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:09,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515229178] [2021-05-22 01:32:09,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:09,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:09,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:09,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:09,736 INFO L87 Difference]: Start difference. First operand 5714 states and 17392 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:09,881 INFO L93 Difference]: Finished difference Result 8606 states and 25410 transitions. [2021-05-22 01:32:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:09,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:09,894 INFO L225 Difference]: With dead ends: 8606 [2021-05-22 01:32:09,894 INFO L226 Difference]: Without dead ends: 8390 [2021-05-22 01:32:09,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 01:32:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8390 states. [2021-05-22 01:32:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8390 to 5486. [2021-05-22 01:32:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5472 states have (on average 3.016264619883041) internal successors, (16505), 5485 states have internal predecessors, (16505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 16505 transitions. [2021-05-22 01:32:10,010 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 16505 transitions. Word has length 17 [2021-05-22 01:32:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:10,010 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 16505 transitions. [2021-05-22 01:32:10,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 16505 transitions. [2021-05-22 01:32:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:10,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:10,013 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:10,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-22 01:32:10,013 INFO L430 AbstractCegarLoop]: === Iteration 37 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 64386530, now seen corresponding path program 1 times [2021-05-22 01:32:10,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:10,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205927062] [2021-05-22 01:32:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:10,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:10,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205927062] [2021-05-22 01:32:10,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205927062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:10,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:10,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947410403] [2021-05-22 01:32:10,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:10,052 INFO L87 Difference]: Start difference. First operand 5486 states and 16505 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:10,198 INFO L93 Difference]: Finished difference Result 8150 states and 23798 transitions. [2021-05-22 01:32:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:10,212 INFO L225 Difference]: With dead ends: 8150 [2021-05-22 01:32:10,212 INFO L226 Difference]: Without dead ends: 7922 [2021-05-22 01:32:10,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 01:32:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7922 states. [2021-05-22 01:32:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7922 to 5315. [2021-05-22 01:32:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 5301 states have (on average 2.9766081871345027) internal successors, (15779), 5314 states have internal predecessors, (15779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 15779 transitions. [2021-05-22 01:32:10,323 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 15779 transitions. Word has length 17 [2021-05-22 01:32:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:10,323 INFO L482 AbstractCegarLoop]: Abstraction has 5315 states and 15779 transitions. [2021-05-22 01:32:10,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 15779 transitions. [2021-05-22 01:32:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:10,325 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:10,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:10,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-22 01:32:10,325 INFO L430 AbstractCegarLoop]: === Iteration 38 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1503799643, now seen corresponding path program 1 times [2021-05-22 01:32:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:10,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982935858] [2021-05-22 01:32:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:10,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:10,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982935858] [2021-05-22 01:32:10,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982935858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:10,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:10,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025613894] [2021-05-22 01:32:10,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:10,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:10,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:10,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:10,356 INFO L87 Difference]: Start difference. First operand 5315 states and 15779 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:10,497 INFO L93 Difference]: Finished difference Result 8150 states and 23573 transitions. [2021-05-22 01:32:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:10,509 INFO L225 Difference]: With dead ends: 8150 [2021-05-22 01:32:10,509 INFO L226 Difference]: Without dead ends: 7902 [2021-05-22 01:32:10,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 01:32:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-05-22 01:32:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 4890. [2021-05-22 01:32:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4878 states have (on average 2.927019270192702) internal successors, (14278), 4889 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 14278 transitions. [2021-05-22 01:32:10,615 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 14278 transitions. Word has length 17 [2021-05-22 01:32:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:10,615 INFO L482 AbstractCegarLoop]: Abstraction has 4890 states and 14278 transitions. [2021-05-22 01:32:10,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 14278 transitions. [2021-05-22 01:32:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:10,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:10,617 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:10,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-22 01:32:10,617 INFO L430 AbstractCegarLoop]: === Iteration 39 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1503584162, now seen corresponding path program 1 times [2021-05-22 01:32:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:10,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511598299] [2021-05-22 01:32:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:10,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:10,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511598299] [2021-05-22 01:32:10,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511598299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:10,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:10,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048492285] [2021-05-22 01:32:10,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:10,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:10,656 INFO L87 Difference]: Start difference. First operand 4890 states and 14278 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:10,820 INFO L93 Difference]: Finished difference Result 7662 states and 21883 transitions. [2021-05-22 01:32:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:10,831 INFO L225 Difference]: With dead ends: 7662 [2021-05-22 01:32:10,831 INFO L226 Difference]: Without dead ends: 7434 [2021-05-22 01:32:10,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 01:32:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2021-05-22 01:32:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 4761. [2021-05-22 01:32:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4749 states have (on average 2.877869025057907) internal successors, (13667), 4760 states have internal predecessors, (13667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 13667 transitions. [2021-05-22 01:32:10,930 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 13667 transitions. Word has length 17 [2021-05-22 01:32:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:10,930 INFO L482 AbstractCegarLoop]: Abstraction has 4761 states and 13667 transitions. [2021-05-22 01:32:10,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 13667 transitions. [2021-05-22 01:32:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:10,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:10,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:10,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-22 01:32:10,932 INFO L430 AbstractCegarLoop]: === Iteration 40 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1374595621, now seen corresponding path program 1 times [2021-05-22 01:32:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:10,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778976715] [2021-05-22 01:32:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:10,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:10,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778976715] [2021-05-22 01:32:10,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778976715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:10,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:10,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:10,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687923066] [2021-05-22 01:32:10,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:10,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:10,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:10,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:10,966 INFO L87 Difference]: Start difference. First operand 4761 states and 13667 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:11,105 INFO L93 Difference]: Finished difference Result 7491 states and 21115 transitions. [2021-05-22 01:32:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:11,117 INFO L225 Difference]: With dead ends: 7491 [2021-05-22 01:32:11,117 INFO L226 Difference]: Without dead ends: 7241 [2021-05-22 01:32:11,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 01:32:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2021-05-22 01:32:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 4370. [2021-05-22 01:32:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4360 states have (on average 2.811467889908257) internal successors, (12258), 4369 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 12258 transitions. [2021-05-22 01:32:11,210 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 12258 transitions. Word has length 17 [2021-05-22 01:32:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:11,210 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 12258 transitions. [2021-05-22 01:32:11,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 12258 transitions. [2021-05-22 01:32:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:32:11,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:11,212 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:32:11,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-22 01:32:11,212 INFO L430 AbstractCegarLoop]: === Iteration 41 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1374380140, now seen corresponding path program 1 times [2021-05-22 01:32:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:11,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144991621] [2021-05-22 01:32:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:11,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:11,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144991621] [2021-05-22 01:32:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144991621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:11,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:11,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 01:32:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039141980] [2021-05-22 01:32:11,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 01:32:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 01:32:11,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:32:11,245 INFO L87 Difference]: Start difference. First operand 4370 states and 12258 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:11,402 INFO L93 Difference]: Finished difference Result 7001 states and 19421 transitions. [2021-05-22 01:32:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:32:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:11,411 INFO L225 Difference]: With dead ends: 7001 [2021-05-22 01:32:11,412 INFO L226 Difference]: Without dead ends: 6737 [2021-05-22 01:32:11,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-22 01:32:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-05-22 01:32:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 4028. [2021-05-22 01:32:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4020 states have (on average 2.7330845771144276) internal successors, (10987), 4027 states have internal predecessors, (10987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 10987 transitions. [2021-05-22 01:32:11,483 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 10987 transitions. Word has length 17 [2021-05-22 01:32:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:11,484 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 10987 transitions. [2021-05-22 01:32:11,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 10987 transitions. [2021-05-22 01:32:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:11,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:11,486 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] [2021-05-22 01:32:11,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-22 01:32:11,487 INFO L430 AbstractCegarLoop]: === Iteration 42 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash -617026222, now seen corresponding path program 1 times [2021-05-22 01:32:11,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:11,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161950054] [2021-05-22 01:32:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:32:11,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:11,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161950054] [2021-05-22 01:32:11,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161950054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:11,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:11,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474269871] [2021-05-22 01:32:11,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:11,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:11,543 INFO L87 Difference]: Start difference. First operand 4028 states and 10987 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:11,731 INFO L93 Difference]: Finished difference Result 6455 states and 17766 transitions. [2021-05-22 01:32:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:11,740 INFO L225 Difference]: With dead ends: 6455 [2021-05-22 01:32:11,740 INFO L226 Difference]: Without dead ends: 6239 [2021-05-22 01:32:11,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6239 states. [2021-05-22 01:32:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6239 to 3971. [2021-05-22 01:32:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 3963 states have (on average 2.73479687105728) internal successors, (10838), 3970 states have internal predecessors, (10838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 10838 transitions. [2021-05-22 01:32:11,809 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 10838 transitions. Word has length 21 [2021-05-22 01:32:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:11,809 INFO L482 AbstractCegarLoop]: Abstraction has 3971 states and 10838 transitions. [2021-05-22 01:32:11,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 10838 transitions. [2021-05-22 01:32:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:11,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:11,812 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] [2021-05-22 01:32:11,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-22 01:32:11,812 INFO L430 AbstractCegarLoop]: === Iteration 43 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash -639005379, now seen corresponding path program 1 times [2021-05-22 01:32:11,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:11,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455051957] [2021-05-22 01:32:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:32:11,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455051957] [2021-05-22 01:32:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455051957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:11,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:11,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:11,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927750278] [2021-05-22 01:32:11,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:11,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:11,849 INFO L87 Difference]: Start difference. First operand 3971 states and 10838 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:12,040 INFO L93 Difference]: Finished difference Result 6041 states and 16605 transitions. [2021-05-22 01:32:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:12,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:12,050 INFO L225 Difference]: With dead ends: 6041 [2021-05-22 01:32:12,051 INFO L226 Difference]: Without dead ends: 5777 [2021-05-22 01:32:12,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-05-22 01:32:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 3870. [2021-05-22 01:32:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3862 states have (on average 2.744432936302434) internal successors, (10599), 3869 states have internal predecessors, (10599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 10599 transitions. [2021-05-22 01:32:12,140 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 10599 transitions. Word has length 21 [2021-05-22 01:32:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:12,140 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 10599 transitions. [2021-05-22 01:32:12,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 10599 transitions. [2021-05-22 01:32:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:12,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:12,143 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] [2021-05-22 01:32:12,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-22 01:32:12,144 INFO L430 AbstractCegarLoop]: === Iteration 44 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash 103303428, now seen corresponding path program 1 times [2021-05-22 01:32:12,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:12,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611918891] [2021-05-22 01:32:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:12,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611918891] [2021-05-22 01:32:12,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611918891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:12,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:12,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736061645] [2021-05-22 01:32:12,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:12,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:12,190 INFO L87 Difference]: Start difference. First operand 3870 states and 10599 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:12,402 INFO L93 Difference]: Finished difference Result 6155 states and 16951 transitions. [2021-05-22 01:32:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:12,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:12,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:12,412 INFO L225 Difference]: With dead ends: 6155 [2021-05-22 01:32:12,412 INFO L226 Difference]: Without dead ends: 5939 [2021-05-22 01:32:12,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5939 states. [2021-05-22 01:32:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5939 to 3813. [2021-05-22 01:32:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3805 states have (on average 2.7463863337713534) internal successors, (10450), 3812 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10450 transitions. [2021-05-22 01:32:12,502 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10450 transitions. Word has length 21 [2021-05-22 01:32:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:12,502 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10450 transitions. [2021-05-22 01:32:12,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10450 transitions. [2021-05-22 01:32:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:12,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:12,506 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] [2021-05-22 01:32:12,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-22 01:32:12,506 INFO L430 AbstractCegarLoop]: === Iteration 45 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:12,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1335678723, now seen corresponding path program 2 times [2021-05-22 01:32:12,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:12,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958435062] [2021-05-22 01:32:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:12,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:12,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958435062] [2021-05-22 01:32:12,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958435062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:12,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:12,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:12,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384287134] [2021-05-22 01:32:12,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:12,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:12,553 INFO L87 Difference]: Start difference. First operand 3813 states and 10450 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:12,762 INFO L93 Difference]: Finished difference Result 5741 states and 15790 transitions. [2021-05-22 01:32:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:12,769 INFO L225 Difference]: With dead ends: 5741 [2021-05-22 01:32:12,769 INFO L226 Difference]: Without dead ends: 5483 [2021-05-22 01:32:12,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-05-22 01:32:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 3576. [2021-05-22 01:32:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3568 states have (on average 2.745515695067265) internal successors, (9796), 3575 states have internal predecessors, (9796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 9796 transitions. [2021-05-22 01:32:12,839 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 9796 transitions. Word has length 21 [2021-05-22 01:32:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:12,839 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 9796 transitions. [2021-05-22 01:32:12,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 9796 transitions. [2021-05-22 01:32:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:12,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:12,841 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] [2021-05-22 01:32:12,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-22 01:32:12,841 INFO L430 AbstractCegarLoop]: === Iteration 46 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:12,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1770123950, now seen corresponding path program 2 times [2021-05-22 01:32:12,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:12,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841168727] [2021-05-22 01:32:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:12,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:12,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841168727] [2021-05-22 01:32:12,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841168727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:12,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:12,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:12,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728550479] [2021-05-22 01:32:12,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:12,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:12,890 INFO L87 Difference]: Start difference. First operand 3576 states and 9796 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:13,097 INFO L93 Difference]: Finished difference Result 5582 states and 15341 transitions. [2021-05-22 01:32:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:13,104 INFO L225 Difference]: With dead ends: 5582 [2021-05-22 01:32:13,104 INFO L226 Difference]: Without dead ends: 5366 [2021-05-22 01:32:13,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2021-05-22 01:32:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 3369. [2021-05-22 01:32:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3361 states have (on average 2.7360904492710505) internal successors, (9196), 3368 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 9196 transitions. [2021-05-22 01:32:13,170 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 9196 transitions. Word has length 21 [2021-05-22 01:32:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:13,170 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 9196 transitions. [2021-05-22 01:32:13,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 9196 transitions. [2021-05-22 01:32:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:13,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:13,173 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] [2021-05-22 01:32:13,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-22 01:32:13,173 INFO L430 AbstractCegarLoop]: === Iteration 47 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash -353120956, now seen corresponding path program 2 times [2021-05-22 01:32:13,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:13,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606030902] [2021-05-22 01:32:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:13,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:13,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606030902] [2021-05-22 01:32:13,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606030902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:13,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:13,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:13,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67698980] [2021-05-22 01:32:13,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:13,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:13,219 INFO L87 Difference]: Start difference. First operand 3369 states and 9196 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:13,403 INFO L93 Difference]: Finished difference Result 5168 states and 14180 transitions. [2021-05-22 01:32:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:13,410 INFO L225 Difference]: With dead ends: 5168 [2021-05-22 01:32:13,410 INFO L226 Difference]: Without dead ends: 4910 [2021-05-22 01:32:13,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2021-05-22 01:32:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3003. [2021-05-22 01:32:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2997 states have (on average 2.735402068735402) internal successors, (8198), 3002 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8198 transitions. [2021-05-22 01:32:13,468 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8198 transitions. Word has length 21 [2021-05-22 01:32:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:13,468 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8198 transitions. [2021-05-22 01:32:13,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8198 transitions. [2021-05-22 01:32:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:13,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:13,470 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] [2021-05-22 01:32:13,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-22 01:32:13,470 INFO L430 AbstractCegarLoop]: === Iteration 48 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1424835939, now seen corresponding path program 1 times [2021-05-22 01:32:13,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:13,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605212811] [2021-05-22 01:32:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:13,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:13,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605212811] [2021-05-22 01:32:13,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605212811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:13,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:13,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:13,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022776630] [2021-05-22 01:32:13,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:13,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:13,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:13,515 INFO L87 Difference]: Start difference. First operand 3003 states and 8198 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:13,690 INFO L93 Difference]: Finished difference Result 4561 states and 12530 transitions. [2021-05-22 01:32:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:13,696 INFO L225 Difference]: With dead ends: 4561 [2021-05-22 01:32:13,696 INFO L226 Difference]: Without dead ends: 4345 [2021-05-22 01:32:13,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2021-05-22 01:32:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 2946. [2021-05-22 01:32:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2940 states have (on average 2.737755102040816) internal successors, (8049), 2945 states have internal predecessors, (8049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 8049 transitions. [2021-05-22 01:32:13,748 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 8049 transitions. Word has length 21 [2021-05-22 01:32:13,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:13,749 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 8049 transitions. [2021-05-22 01:32:13,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 8049 transitions. [2021-05-22 01:32:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:13,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:13,751 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] [2021-05-22 01:32:13,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-22 01:32:13,751 INFO L430 AbstractCegarLoop]: === Iteration 49 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1431149206, now seen corresponding path program 1 times [2021-05-22 01:32:13,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:13,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058894174] [2021-05-22 01:32:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:13,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:13,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058894174] [2021-05-22 01:32:13,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058894174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:13,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:13,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867063218] [2021-05-22 01:32:13,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:13,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:13,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:13,805 INFO L87 Difference]: Start difference. First operand 2946 states and 8049 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:13,952 INFO L93 Difference]: Finished difference Result 4291 states and 11741 transitions. [2021-05-22 01:32:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:13,957 INFO L225 Difference]: With dead ends: 4291 [2021-05-22 01:32:13,957 INFO L226 Difference]: Without dead ends: 4057 [2021-05-22 01:32:13,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-05-22 01:32:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 2871. [2021-05-22 01:32:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2865 states have (on average 2.7469458987783595) internal successors, (7870), 2870 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 7870 transitions. [2021-05-22 01:32:14,007 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 7870 transitions. Word has length 21 [2021-05-22 01:32:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:14,007 INFO L482 AbstractCegarLoop]: Abstraction has 2871 states and 7870 transitions. [2021-05-22 01:32:14,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 7870 transitions. [2021-05-22 01:32:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:14,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:14,009 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] [2021-05-22 01:32:14,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-22 01:32:14,009 INFO L430 AbstractCegarLoop]: === Iteration 50 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1319664285, now seen corresponding path program 2 times [2021-05-22 01:32:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352693679] [2021-05-22 01:32:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:14,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352693679] [2021-05-22 01:32:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352693679] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:14,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:14,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:14,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822732701] [2021-05-22 01:32:14,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:14,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:14,070 INFO L87 Difference]: Start difference. First operand 2871 states and 7870 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:14,246 INFO L93 Difference]: Finished difference Result 4835 states and 13339 transitions. [2021-05-22 01:32:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:14,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:14,252 INFO L225 Difference]: With dead ends: 4835 [2021-05-22 01:32:14,253 INFO L226 Difference]: Without dead ends: 4619 [2021-05-22 01:32:14,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2021-05-22 01:32:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 2676. [2021-05-22 01:32:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2670 states have (on average 2.7348314606741573) internal successors, (7302), 2675 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 7302 transitions. [2021-05-22 01:32:14,302 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 7302 transitions. Word has length 21 [2021-05-22 01:32:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:14,302 INFO L482 AbstractCegarLoop]: Abstraction has 2676 states and 7302 transitions. [2021-05-22 01:32:14,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 7302 transitions. [2021-05-22 01:32:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:14,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:14,305 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] [2021-05-22 01:32:14,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-22 01:32:14,305 INFO L430 AbstractCegarLoop]: === Iteration 51 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1297685128, now seen corresponding path program 1 times [2021-05-22 01:32:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:14,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727750070] [2021-05-22 01:32:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:14,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727750070] [2021-05-22 01:32:14,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727750070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:14,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:14,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:14,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038717655] [2021-05-22 01:32:14,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:14,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:14,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:14,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:14,349 INFO L87 Difference]: Start difference. First operand 2676 states and 7302 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:14,519 INFO L93 Difference]: Finished difference Result 4421 states and 12178 transitions. [2021-05-22 01:32:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:14,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:14,524 INFO L225 Difference]: With dead ends: 4421 [2021-05-22 01:32:14,524 INFO L226 Difference]: Without dead ends: 4157 [2021-05-22 01:32:14,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2021-05-22 01:32:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 2575. [2021-05-22 01:32:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2569 states have (on average 2.749318801089918) internal successors, (7063), 2574 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 7063 transitions. [2021-05-22 01:32:14,570 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 7063 transitions. Word has length 21 [2021-05-22 01:32:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:14,570 INFO L482 AbstractCegarLoop]: Abstraction has 2575 states and 7063 transitions. [2021-05-22 01:32:14,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 7063 transitions. [2021-05-22 01:32:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:14,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:14,572 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] [2021-05-22 01:32:14,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-22 01:32:14,572 INFO L430 AbstractCegarLoop]: === Iteration 52 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1252932246, now seen corresponding path program 2 times [2021-05-22 01:32:14,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:14,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527540748] [2021-05-22 01:32:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:14,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:14,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527540748] [2021-05-22 01:32:14,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527540748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:14,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:14,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602313810] [2021-05-22 01:32:14,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:14,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:14,615 INFO L87 Difference]: Start difference. First operand 2575 states and 7063 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:14,801 INFO L93 Difference]: Finished difference Result 3860 states and 10541 transitions. [2021-05-22 01:32:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:14,806 INFO L225 Difference]: With dead ends: 3860 [2021-05-22 01:32:14,806 INFO L226 Difference]: Without dead ends: 3644 [2021-05-22 01:32:14,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-05-22 01:32:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2368. [2021-05-22 01:32:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2362 states have (on average 2.7362404741744286) internal successors, (6463), 2367 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6463 transitions. [2021-05-22 01:32:14,847 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6463 transitions. Word has length 21 [2021-05-22 01:32:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:14,847 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6463 transitions. [2021-05-22 01:32:14,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6463 transitions. [2021-05-22 01:32:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:14,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:14,848 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] [2021-05-22 01:32:14,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-22 01:32:14,849 INFO L430 AbstractCegarLoop]: === Iteration 53 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:14,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1625032056, now seen corresponding path program 2 times [2021-05-22 01:32:14,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:14,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747401611] [2021-05-22 01:32:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:32:14,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747401611] [2021-05-22 01:32:14,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747401611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:14,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:14,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443505869] [2021-05-22 01:32:14,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:14,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:14,902 INFO L87 Difference]: Start difference. First operand 2368 states and 6463 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:15,041 INFO L93 Difference]: Finished difference Result 3302 states and 9008 transitions. [2021-05-22 01:32:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:15,045 INFO L225 Difference]: With dead ends: 3302 [2021-05-22 01:32:15,045 INFO L226 Difference]: Without dead ends: 3024 [2021-05-22 01:32:15,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-05-22 01:32:15,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1982. [2021-05-22 01:32:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1978 states have (on average 2.738624873609707) internal successors, (5417), 1981 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 5417 transitions. [2021-05-22 01:32:15,076 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 5417 transitions. Word has length 21 [2021-05-22 01:32:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:15,076 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 5417 transitions. [2021-05-22 01:32:15,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 5417 transitions. [2021-05-22 01:32:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:15,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:15,077 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] [2021-05-22 01:32:15,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-22 01:32:15,078 INFO L430 AbstractCegarLoop]: === Iteration 54 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash 669251137, now seen corresponding path program 1 times [2021-05-22 01:32:15,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:15,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19816857] [2021-05-22 01:32:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:15,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19816857] [2021-05-22 01:32:15,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19816857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:15,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:15,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:15,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222718149] [2021-05-22 01:32:15,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:15,135 INFO L87 Difference]: Start difference. First operand 1982 states and 5417 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:15,284 INFO L93 Difference]: Finished difference Result 2819 states and 7682 transitions. [2021-05-22 01:32:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:15,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:15,288 INFO L225 Difference]: With dead ends: 2819 [2021-05-22 01:32:15,288 INFO L226 Difference]: Without dead ends: 2603 [2021-05-22 01:32:15,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-05-22 01:32:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1925. [2021-05-22 01:32:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1921 states have (on average 2.7423217074440394) internal successors, (5268), 1924 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 5268 transitions. [2021-05-22 01:32:15,315 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 5268 transitions. Word has length 21 [2021-05-22 01:32:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:15,316 INFO L482 AbstractCegarLoop]: Abstraction has 1925 states and 5268 transitions. [2021-05-22 01:32:15,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 5268 transitions. [2021-05-22 01:32:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:15,317 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:15,317 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] [2021-05-22 01:32:15,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-22 01:32:15,317 INFO L430 AbstractCegarLoop]: === Iteration 55 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2108233288, now seen corresponding path program 1 times [2021-05-22 01:32:15,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:15,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832034856] [2021-05-22 01:32:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:15,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832034856] [2021-05-22 01:32:15,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832034856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:15,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:15,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:15,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790728593] [2021-05-22 01:32:15,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:15,356 INFO L87 Difference]: Start difference. First operand 1925 states and 5268 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:15,483 INFO L93 Difference]: Finished difference Result 2405 states and 6521 transitions. [2021-05-22 01:32:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:15,486 INFO L225 Difference]: With dead ends: 2405 [2021-05-22 01:32:15,486 INFO L226 Difference]: Without dead ends: 2171 [2021-05-22 01:32:15,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-05-22 01:32:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1850. [2021-05-22 01:32:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1846 states have (on average 2.756771397616468) internal successors, (5089), 1849 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 5089 transitions. [2021-05-22 01:32:15,512 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 5089 transitions. Word has length 21 [2021-05-22 01:32:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:15,513 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 5089 transitions. [2021-05-22 01:32:15,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 5089 transitions. [2021-05-22 01:32:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:15,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:15,514 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] [2021-05-22 01:32:15,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-22 01:32:15,514 INFO L430 AbstractCegarLoop]: === Iteration 56 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:15,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:15,514 INFO L82 PathProgramCache]: Analyzing trace with hash -881215935, now seen corresponding path program 2 times [2021-05-22 01:32:15,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:15,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972397404] [2021-05-22 01:32:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:15,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972397404] [2021-05-22 01:32:15,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972397404] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:15,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:15,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:15,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890292852] [2021-05-22 01:32:15,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:15,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:15,565 INFO L87 Difference]: Start difference. First operand 1850 states and 5089 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:15,716 INFO L93 Difference]: Finished difference Result 3093 states and 8491 transitions. [2021-05-22 01:32:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:15,719 INFO L225 Difference]: With dead ends: 3093 [2021-05-22 01:32:15,719 INFO L226 Difference]: Without dead ends: 2877 [2021-05-22 01:32:15,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2021-05-22 01:32:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 1655. [2021-05-22 01:32:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1651 states have (on average 2.7383403997577225) internal successors, (4521), 1654 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 4521 transitions. [2021-05-22 01:32:15,747 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 4521 transitions. Word has length 21 [2021-05-22 01:32:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:15,748 INFO L482 AbstractCegarLoop]: Abstraction has 1655 states and 4521 transitions. [2021-05-22 01:32:15,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 4521 transitions. [2021-05-22 01:32:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:15,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:15,749 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] [2021-05-22 01:32:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-22 01:32:15,749 INFO L430 AbstractCegarLoop]: === Iteration 57 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1974769210, now seen corresponding path program 1 times [2021-05-22 01:32:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:15,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875538565] [2021-05-22 01:32:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:15,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:15,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875538565] [2021-05-22 01:32:15,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875538565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:15,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:15,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854566627] [2021-05-22 01:32:15,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:15,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:15,797 INFO L87 Difference]: Start difference. First operand 1655 states and 4521 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:15,924 INFO L93 Difference]: Finished difference Result 2535 states and 6958 transitions. [2021-05-22 01:32:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:15,927 INFO L225 Difference]: With dead ends: 2535 [2021-05-22 01:32:15,927 INFO L226 Difference]: Without dead ends: 2277 [2021-05-22 01:32:15,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-05-22 01:32:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1560. [2021-05-22 01:32:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1556 states have (on average 2.7596401028277633) internal successors, (4294), 1559 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 4294 transitions. [2021-05-22 01:32:15,951 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 4294 transitions. Word has length 21 [2021-05-22 01:32:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:15,951 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 4294 transitions. [2021-05-22 01:32:15,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 4294 transitions. [2021-05-22 01:32:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:15,952 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:15,952 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] [2021-05-22 01:32:15,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-22 01:32:15,952 INFO L430 AbstractCegarLoop]: === Iteration 58 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash -814483896, now seen corresponding path program 2 times [2021-05-22 01:32:15,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:15,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366695484] [2021-05-22 01:32:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:15,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366695484] [2021-05-22 01:32:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366695484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:15,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:15,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:15,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554485602] [2021-05-22 01:32:15,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:15,995 INFO L87 Difference]: Start difference. First operand 1560 states and 4294 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:16,131 INFO L93 Difference]: Finished difference Result 2520 states and 6881 transitions. [2021-05-22 01:32:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:16,134 INFO L225 Difference]: With dead ends: 2520 [2021-05-22 01:32:16,134 INFO L226 Difference]: Without dead ends: 2304 [2021-05-22 01:32:16,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-05-22 01:32:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1353. [2021-05-22 01:32:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 2.738324684951816) internal successors, (3694), 1352 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3694 transitions. [2021-05-22 01:32:16,155 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3694 transitions. Word has length 21 [2021-05-22 01:32:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:16,155 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 3694 transitions. [2021-05-22 01:32:16,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3694 transitions. [2021-05-22 01:32:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:16,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:16,156 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] [2021-05-22 01:32:16,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-22 01:32:16,156 INFO L430 AbstractCegarLoop]: === Iteration 59 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash 602519098, now seen corresponding path program 2 times [2021-05-22 01:32:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:16,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066830848] [2021-05-22 01:32:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:16,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:16,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066830848] [2021-05-22 01:32:16,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066830848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:16,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:16,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:16,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188081093] [2021-05-22 01:32:16,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:16,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:16,200 INFO L87 Difference]: Start difference. First operand 1353 states and 3694 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:16,320 INFO L93 Difference]: Finished difference Result 1962 states and 5348 transitions. [2021-05-22 01:32:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:16,323 INFO L225 Difference]: With dead ends: 1962 [2021-05-22 01:32:16,323 INFO L226 Difference]: Without dead ends: 1688 [2021-05-22 01:32:16,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-05-22 01:32:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 971. [2021-05-22 01:32:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 969 states have (on average 2.740970072239422) internal successors, (2656), 970 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2656 transitions. [2021-05-22 01:32:16,339 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2656 transitions. Word has length 21 [2021-05-22 01:32:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:16,340 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2656 transitions. [2021-05-22 01:32:16,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2656 transitions. [2021-05-22 01:32:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:16,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:16,340 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] [2021-05-22 01:32:16,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-22 01:32:16,341 INFO L430 AbstractCegarLoop]: === Iteration 60 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1351793316, now seen corresponding path program 1 times [2021-05-22 01:32:16,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:16,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790588946] [2021-05-22 01:32:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:16,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:16,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790588946] [2021-05-22 01:32:16,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790588946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:16,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:16,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:16,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942667947] [2021-05-22 01:32:16,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:16,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:16,399 INFO L87 Difference]: Start difference. First operand 971 states and 2656 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:16,506 INFO L93 Difference]: Finished difference Result 1487 states and 4038 transitions. [2021-05-22 01:32:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:16,508 INFO L225 Difference]: With dead ends: 1487 [2021-05-22 01:32:16,508 INFO L226 Difference]: Without dead ends: 1271 [2021-05-22 01:32:16,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-05-22 01:32:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 914. [2021-05-22 01:32:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 912 states have (on average 2.74890350877193) internal successors, (2507), 913 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2507 transitions. [2021-05-22 01:32:16,520 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2507 transitions. Word has length 21 [2021-05-22 01:32:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:16,520 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2507 transitions. [2021-05-22 01:32:16,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2507 transitions. [2021-05-22 01:32:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:16,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:16,521 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] [2021-05-22 01:32:16,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-22 01:32:16,521 INFO L430 AbstractCegarLoop]: === Iteration 61 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1526170986, now seen corresponding path program 1 times [2021-05-22 01:32:16,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:16,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620402258] [2021-05-22 01:32:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:16,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:16,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620402258] [2021-05-22 01:32:16,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620402258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:16,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:16,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:16,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367434980] [2021-05-22 01:32:16,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:16,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:16,563 INFO L87 Difference]: Start difference. First operand 914 states and 2507 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:16,661 INFO L93 Difference]: Finished difference Result 1073 states and 2877 transitions. [2021-05-22 01:32:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:16,662 INFO L225 Difference]: With dead ends: 1073 [2021-05-22 01:32:16,662 INFO L226 Difference]: Without dead ends: 839 [2021-05-22 01:32:16,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-05-22 01:32:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2021-05-22 01:32:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 837 states have (on average 2.781362007168459) internal successors, (2328), 838 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2328 transitions. [2021-05-22 01:32:16,672 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2328 transitions. Word has length 21 [2021-05-22 01:32:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:16,672 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2328 transitions. [2021-05-22 01:32:16,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2328 transitions. [2021-05-22 01:32:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:16,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:16,673 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] [2021-05-22 01:32:16,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-22 01:32:16,674 INFO L430 AbstractCegarLoop]: === Iteration 62 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash -20456796, now seen corresponding path program 2 times [2021-05-22 01:32:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:16,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296008676] [2021-05-22 01:32:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:16,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296008676] [2021-05-22 01:32:16,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296008676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:16,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:16,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387169423] [2021-05-22 01:32:16,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:16,720 INFO L87 Difference]: Start difference. First operand 839 states and 2328 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:16,836 INFO L93 Difference]: Finished difference Result 1217 states and 3291 transitions. [2021-05-22 01:32:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:16,838 INFO L225 Difference]: With dead ends: 1217 [2021-05-22 01:32:16,838 INFO L226 Difference]: Without dead ends: 1001 [2021-05-22 01:32:16,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-05-22 01:32:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 644. [2021-05-22 01:32:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 642 states have (on average 2.7414330218068534) internal successors, (1760), 643 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1760 transitions. [2021-05-22 01:32:16,849 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1760 transitions. Word has length 21 [2021-05-22 01:32:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:16,849 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 1760 transitions. [2021-05-22 01:32:16,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1760 transitions. [2021-05-22 01:32:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:16,849 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:16,849 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] [2021-05-22 01:32:16,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-22 01:32:16,849 INFO L430 AbstractCegarLoop]: === Iteration 63 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1459438947, now seen corresponding path program 1 times [2021-05-22 01:32:16,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:16,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587394941] [2021-05-22 01:32:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:16,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:16,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587394941] [2021-05-22 01:32:16,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587394941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:16,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:16,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:16,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150416275] [2021-05-22 01:32:16,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:16,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:16,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:16,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:16,889 INFO L87 Difference]: Start difference. First operand 644 states and 1760 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:16,980 INFO L93 Difference]: Finished difference Result 803 states and 2130 transitions. [2021-05-22 01:32:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:16,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:16,981 INFO L225 Difference]: With dead ends: 803 [2021-05-22 01:32:16,981 INFO L226 Difference]: Without dead ends: 569 [2021-05-22 01:32:16,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-22 01:32:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-05-22 01:32:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 567 states have (on average 2.7883597883597884) internal successors, (1581), 568 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1581 transitions. [2021-05-22 01:32:16,988 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1581 transitions. Word has length 21 [2021-05-22 01:32:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:16,988 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1581 transitions. [2021-05-22 01:32:16,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1581 transitions. [2021-05-22 01:32:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:16,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:16,988 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] [2021-05-22 01:32:16,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-22 01:32:16,988 INFO L430 AbstractCegarLoop]: === Iteration 64 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:16,989 INFO L82 PathProgramCache]: Analyzing trace with hash -153920874, now seen corresponding path program 2 times [2021-05-22 01:32:16,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:16,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566649303] [2021-05-22 01:32:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:17,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:17,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566649303] [2021-05-22 01:32:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566649303] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070502609] [2021-05-22 01:32:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:17,038 INFO L87 Difference]: Start difference. First operand 569 states and 1581 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:17,127 INFO L93 Difference]: Finished difference Result 668 states and 1737 transitions. [2021-05-22 01:32:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 01:32:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:17,128 INFO L225 Difference]: With dead ends: 668 [2021-05-22 01:32:17,129 INFO L226 Difference]: Without dead ends: 452 [2021-05-22 01:32:17,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-22 01:32:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 362. [2021-05-22 01:32:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 2.725) internal successors, (981), 361 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 981 transitions. [2021-05-22 01:32:17,133 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 981 transitions. Word has length 21 [2021-05-22 01:32:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:17,134 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 981 transitions. [2021-05-22 01:32:17,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 981 transitions. [2021-05-22 01:32:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 01:32:17,134 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:17,134 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] [2021-05-22 01:32:17,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-22 01:32:17,134 INFO L430 AbstractCegarLoop]: === Iteration 65 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:32:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:17,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1285061277, now seen corresponding path program 2 times [2021-05-22 01:32:17,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:17,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81085089] [2021-05-22 01:32:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:32:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:32:17,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:32:17,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81085089] [2021-05-22 01:32:17,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81085089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:32:17,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:32:17,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-22 01:32:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904926371] [2021-05-22 01:32:17,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 01:32:17,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:32:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 01:32:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 01:32:17,187 INFO L87 Difference]: Start difference. First operand 362 states and 981 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:32:17,270 INFO L93 Difference]: Finished difference Result 254 states and 576 transitions. [2021-05-22 01:32:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 01:32:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 01:32:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:32:17,270 INFO L225 Difference]: With dead ends: 254 [2021-05-22 01:32:17,271 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:32:17,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-22 01:32:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:32:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:32:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:32:17,271 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-05-22 01:32:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:32:17,271 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:32:17,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:32:17,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:32:17,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-22 01:32:17,272 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:32:17,272 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:32:17,272 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:32:17,272 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:32:17,272 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:32:17,272 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:32:17,272 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:32:17,272 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:32:17,273 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:32:17,273 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:32:17,273 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-22 01:32:18,284 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:32:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-05-22 01:32:18,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:32:18,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-05-22 01:32:18,307 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-05-22 01:32:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:32:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash -384193469, now seen corresponding path program 1 times [2021-05-22 01:32:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:32:18,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196047707] [2021-05-22 01:32:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:32:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:32:18,309 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:32:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-22 01:32:18,310 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-22 01:32:18,313 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-22 01:32:18,313 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-22 01:32:18,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-22 01:32:18,314 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-05-22 01:32:18,314 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-22 01:32:18,314 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-05-22 01:32:18,319 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,319 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,319 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,319 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,320 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,321 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,322 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,323 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,323 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,323 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,323 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,323 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,324 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,325 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,325 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,325 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,325 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,325 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,326 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,334 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,335 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,335 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-22 01:32:18,336 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-22 01:32:18,336 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-22 01:32:18,337 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:32:18,337 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:32:18,337 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:32:18,337 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:32:18,337 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:32:18,337 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:32:18,337 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:32:18,337 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:32:18,340 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 43 transitions, 131 flow [2021-05-22 01:33:05,122 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107667 states, 107572 states have (on average 4.988073104525341) internal successors, (536577), 107666 states have internal predecessors, (536577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 107667 states, 107572 states have (on average 4.988073104525341) internal successors, (536577), 107666 states have internal predecessors, (536577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-05-22 01:33:05,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:05,266 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:33:05,266 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:33:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:05,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1926720781, now seen corresponding path program 1 times [2021-05-22 01:33:05,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:05,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778518938] [2021-05-22 01:33:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:33:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:33:05,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:33:05,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778518938] [2021-05-22 01:33:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778518938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:33:05,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:33:05,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:33:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360339227] [2021-05-22 01:33:05,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:33:05,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:33:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:33:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:05,689 INFO L87 Difference]: Start difference. First operand has 107667 states, 107572 states have (on average 4.988073104525341) internal successors, (536577), 107666 states have internal predecessors, (536577), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:33:07,253 INFO L93 Difference]: Finished difference Result 159884 states and 789753 transitions. [2021-05-22 01:33:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:33:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-05-22 01:33:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:33:07,972 INFO L225 Difference]: With dead ends: 159884 [2021-05-22 01:33:07,972 INFO L226 Difference]: Without dead ends: 159318 [2021-05-22 01:33:07,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159318 states. [2021-05-22 01:33:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159318 to 133172. [2021-05-22 01:33:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133172 states, 133085 states have (on average 5.008152684374648) internal successors, (666510), 133171 states have internal predecessors, (666510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133172 states to 133172 states and 666510 transitions. [2021-05-22 01:33:16,043 INFO L78 Accepts]: Start accepts. Automaton has 133172 states and 666510 transitions. Word has length 7 [2021-05-22 01:33:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:33:16,043 INFO L482 AbstractCegarLoop]: Abstraction has 133172 states and 666510 transitions. [2021-05-22 01:33:16,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 133172 states and 666510 transitions. [2021-05-22 01:33:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-05-22 01:33:16,044 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:16,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:33:16,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-22 01:33:16,044 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:33:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash 663806641, now seen corresponding path program 1 times [2021-05-22 01:33:16,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:16,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251580240] [2021-05-22 01:33:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:33:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 01:33:16,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:33:16,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251580240] [2021-05-22 01:33:16,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251580240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:33:16,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:33:16,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:33:16,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558598621] [2021-05-22 01:33:16,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:33:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:33:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:33:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:16,057 INFO L87 Difference]: Start difference. First operand 133172 states and 666510 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:33:18,427 INFO L93 Difference]: Finished difference Result 190086 states and 940922 transitions. [2021-05-22 01:33:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:33:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-05-22 01:33:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:33:19,405 INFO L225 Difference]: With dead ends: 190086 [2021-05-22 01:33:19,405 INFO L226 Difference]: Without dead ends: 189776 [2021-05-22 01:33:19,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189776 states. [2021-05-22 01:33:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189776 to 157848. [2021-05-22 01:33:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157848 states, 157762 states have (on average 5.018559602439117) internal successors, (791738), 157847 states have internal predecessors, (791738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157848 states to 157848 states and 791738 transitions. [2021-05-22 01:33:28,346 INFO L78 Accepts]: Start accepts. Automaton has 157848 states and 791738 transitions. Word has length 8 [2021-05-22 01:33:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:33:28,346 INFO L482 AbstractCegarLoop]: Abstraction has 157848 states and 791738 transitions. [2021-05-22 01:33:28,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 157848 states and 791738 transitions. [2021-05-22 01:33:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-22 01:33:28,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:28,347 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:33:28,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-22 01:33:28,347 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:33:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash -3600934, now seen corresponding path program 1 times [2021-05-22 01:33:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:28,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464314266] [2021-05-22 01:33:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:33:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 01:33:28,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:33:28,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464314266] [2021-05-22 01:33:28,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464314266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:33:28,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:33:28,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:33:28,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897447380] [2021-05-22 01:33:28,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:33:28,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:33:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:33:28,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:28,362 INFO L87 Difference]: Start difference. First operand 157848 states and 791738 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:33:31,225 INFO L93 Difference]: Finished difference Result 218028 states and 1079674 transitions. [2021-05-22 01:33:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:33:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-22 01:33:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:33:32,300 INFO L225 Difference]: With dead ends: 218028 [2021-05-22 01:33:32,300 INFO L226 Difference]: Without dead ends: 217728 [2021-05-22 01:33:32,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217728 states. [2021-05-22 01:33:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217728 to 180648. [2021-05-22 01:33:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180648 states, 180563 states have (on average 5.020508077513112) internal successors, (906518), 180647 states have internal predecessors, (906518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180648 states to 180648 states and 906518 transitions. [2021-05-22 01:33:42,630 INFO L78 Accepts]: Start accepts. Automaton has 180648 states and 906518 transitions. Word has length 9 [2021-05-22 01:33:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:33:42,630 INFO L482 AbstractCegarLoop]: Abstraction has 180648 states and 906518 transitions. [2021-05-22 01:33:42,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 180648 states and 906518 transitions. [2021-05-22 01:33:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 01:33:42,632 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:42,632 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:33:42,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-22 01:33:42,633 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:33:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 616505957, now seen corresponding path program 1 times [2021-05-22 01:33:42,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:42,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606069322] [2021-05-22 01:33:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:33:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-22 01:33:42,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:33:42,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606069322] [2021-05-22 01:33:42,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606069322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:33:42,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:33:42,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 01:33:42,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858402802] [2021-05-22 01:33:42,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:33:42,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:33:42,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:33:42,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:42,640 INFO L87 Difference]: Start difference. First operand 180648 states and 906518 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:33:45,483 INFO L93 Difference]: Finished difference Result 241032 states and 1191806 transitions. [2021-05-22 01:33:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:33:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-22 01:33:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:33:46,805 INFO L225 Difference]: With dead ends: 241032 [2021-05-22 01:33:46,805 INFO L226 Difference]: Without dead ends: 240752 [2021-05-22 01:33:46,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:33:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240752 states. [2021-05-22 01:33:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240752 to 199864. [2021-05-22 01:33:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199864 states, 199780 states have (on average 5.012383621984182) internal successors, (1001374), 199863 states have internal predecessors, (1001374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199864 states to 199864 states and 1001374 transitions. [2021-05-22 01:33:58,790 INFO L78 Accepts]: Start accepts. Automaton has 199864 states and 1001374 transitions. Word has length 10 [2021-05-22 01:33:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:33:58,790 INFO L482 AbstractCegarLoop]: Abstraction has 199864 states and 1001374 transitions. [2021-05-22 01:33:58,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:33:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 199864 states and 1001374 transitions. [2021-05-22 01:33:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 01:33:58,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:33:58,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:33:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-22 01:33:58,795 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:33:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:33:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 841734634, now seen corresponding path program 1 times [2021-05-22 01:33:58,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:33:58,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522972780] [2021-05-22 01:33:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:33:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:33:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:33:58,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:33:58,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522972780] [2021-05-22 01:33:58,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522972780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:33:58,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:33:58,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 01:33:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466738380] [2021-05-22 01:33:58,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 01:33:58,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:33:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 01:33:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 01:33:58,812 INFO L87 Difference]: Start difference. First operand 199864 states and 1001374 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:34:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:34:03,859 INFO L93 Difference]: Finished difference Result 376674 states and 1828738 transitions. [2021-05-22 01:34:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:34:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-22 01:34:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:34:07,694 INFO L225 Difference]: With dead ends: 376674 [2021-05-22 01:34:07,695 INFO L226 Difference]: Without dead ends: 376008 [2021-05-22 01:34:07,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42