/usr/bin/java -Xmx8000000000 -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-PN-NoLbe-OGIterative.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 02:35:49,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 02:35:49,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 02:35:49,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 02:35:49,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 02:35:49,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 02:35:49,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 02:35:49,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 02:35:49,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 02:35:49,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 02:35:49,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 02:35:49,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 02:35:49,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 02:35:49,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 02:35:49,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 02:35:49,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 02:35:49,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 02:35:49,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-13 02:35:49,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-13 02:35:49,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-13 02:35:49,834 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-PN-NoLbe-OGIterative.epf [2021-08-13 02:35:49,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 02:35:49,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 02:35:49,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 02:35:49,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 02:35:49,870 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 02:35:49,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 02:35:49,870 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 02:35:49,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 02:35:49,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 02:35:49,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 02:35:49,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 02:35:49,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 02:35:49,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 02:35:49,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 02:35:49,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 02:35:49,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 02:35:49,873 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 02:35:49,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 02:35:50,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 02:35:50,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 02:35:50,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 02:35:50,202 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 02:35:50,203 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 02:35:50,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-08-13 02:35:50,205 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-08-13 02:35:50,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 02:35:50,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 02:35:50,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 02:35:50,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 02:35:50,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 02:35:50,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 02:35:50,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 02:35:50,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 02:35:50,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 02:35:50,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... [2021-08-13 02:35:50,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 02:35:50,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 02:35:50,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 02:35:50,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 02:35:50,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 02:35:50,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 02:35:50,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 02:35:50,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 02:35:50,345 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-13 02:35:50,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-13 02:35:50,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-13 02:35:50,346 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 02:35:50,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 02:35:50,456 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-13 02:35:50,457 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:35:50 BoogieIcfgContainer [2021-08-13 02:35:50,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 02:35:50,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 02:35:50,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 02:35:50,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 02:35:50,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:35:50" (1/2) ... [2021-08-13 02:35:50,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b268de7 and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 02:35:50, skipping insertion in model container [2021-08-13 02:35:50,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:35:50" (2/2) ... [2021-08-13 02:35:50,464 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-08-13 02:35:50,473 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 02:35:50,474 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 02:35:50,475 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 02:35:50,497 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,497 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,498 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,498 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,502 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,506 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:35:50,524 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 02:35:50,548 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:35:50,548 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:35:50,549 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:35:50,549 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:35:50,549 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:35:50,549 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:35:50,549 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:35:50,549 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:35:50,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-08-13 02:35:50,574 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-08-13 02:35:50,574 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:50,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 02:35:50,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 9 transitions, 23 flow [2021-08-13 02:35:50,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 9 transitions, 23 flow [2021-08-13 02:35:50,583 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-08-13 02:35:50,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:50,583 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:50,584 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-08-13 02:35:50,584 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:50,594 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-08-13 02:35:50,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:50,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981358356] [2021-08-13 02:35:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:50,665 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:50,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:50,701 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:35:50,701 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:35:50,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 02:35:50,702 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:35:50,702 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-13 02:35:50,710 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,711 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,711 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,711 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,714 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,714 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,715 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,715 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,716 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,718 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,720 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:35:50,721 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 02:35:50,725 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:35:50,725 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:35:50,725 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:35:50,725 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:35:50,725 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:35:50,725 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:35:50,725 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:35:50,725 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:35:50,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 02:35:50,734 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-08-13 02:35:50,734 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:50,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-13 02:35:50,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 02:35:50,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-08-13 02:35:50,740 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-08-13 02:35:50,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:50,741 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:50,741 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-08-13 02:35:50,741 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1773586, now seen corresponding path program 1 times [2021-08-13 02:35:50,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:50,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660454693] [2021-08-13 02:35:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:50,747 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:50,755 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:50,759 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:35:50,759 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:35:50,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 02:35:50,759 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:35:50,759 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-13 02:35:50,785 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,785 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,785 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,785 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,785 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,786 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,786 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,786 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,786 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,786 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,786 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,787 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,787 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,788 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,789 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:50,790 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:35:50,790 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-13 02:35:50,791 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:35:50,791 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:35:50,791 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:35:50,791 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:35:50,791 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:35:50,791 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:35:50,791 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:35:50,791 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:35:50,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-08-13 02:35:50,796 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-08-13 02:35:50,796 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:50,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-08-13 02:35:50,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 21 transitions, 63 flow [2021-08-13 02:35:50,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 63 flow [2021-08-13 02:35:50,799 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 02:35:50,799 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:50,799 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:50,799 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:35:50,799 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash 75168682, now seen corresponding path program 1 times [2021-08-13 02:35:50,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:50,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795493390] [2021-08-13 02:35:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:35:50,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:50,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:50,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:50,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:50,882 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:35:50,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:35:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:35:50,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:35:50,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795493390] [2021-08-13 02:35:50,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795493390] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:35:50,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:35:50,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:35:50,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561801688] [2021-08-13 02:35:50,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:35:50,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:35:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:35:50,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:35:50,903 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 21 [2021-08-13 02:35:50,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:50,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:35:50,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 21 [2021-08-13 02:35:50,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:35:51,173 INFO L129 PetriNetUnfolder]: 291/669 cut-off events. [2021-08-13 02:35:51,174 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:51,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 669 events. 291/669 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4286 event pairs, 91 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 1230. Up to 175 conditions per place. [2021-08-13 02:35:51,187 INFO L132 encePairwiseOnDemand]: 10/21 looper letters, 28 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2021-08-13 02:35:51,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 49 transitions, 203 flow [2021-08-13 02:35:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:35:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:35:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2021-08-13 02:35:51,198 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7904761904761904 [2021-08-13 02:35:51,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2021-08-13 02:35:51,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2021-08-13 02:35:51,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:35:51,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2021-08-13 02:35:51,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,208 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,208 INFO L348 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2021-08-13 02:35:51,209 INFO L482 AbstractCegarLoop]: Abstraction has has 32 places, 49 transitions, 203 flow [2021-08-13 02:35:51,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,209 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:51,209 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:35:51,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 02:35:51,210 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash 75175629, now seen corresponding path program 1 times [2021-08-13 02:35:51,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:51,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791174761] [2021-08-13 02:35:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:51,214 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:51,216 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:51,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:35:51,217 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:35:51,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 02:35:51,218 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:35:51,218 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-13 02:35:51,223 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,223 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,223 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,223 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,224 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,224 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,224 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,224 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,225 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,225 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,225 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,225 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,226 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,226 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,226 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,226 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,227 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,229 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,230 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,231 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:51,231 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:35:51,232 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-13 02:35:51,233 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:35:51,233 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:35:51,233 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:35:51,233 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:35:51,233 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:35:51,234 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:35:51,234 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:35:51,234 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:35:51,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-08-13 02:35:51,240 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-08-13 02:35:51,240 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:51,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 90 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-08-13 02:35:51,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 27 transitions, 86 flow [2021-08-13 02:35:51,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 27 transitions, 86 flow [2021-08-13 02:35:51,243 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-08-13 02:35:51,243 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:51,243 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:51,243 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:35:51,243 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash 101078907, now seen corresponding path program 1 times [2021-08-13 02:35:51,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:51,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362077560] [2021-08-13 02:35:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:35:51,258 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:51,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:51,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:51,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:51,272 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:35:51,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:35:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:35:51,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:35:51,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362077560] [2021-08-13 02:35:51,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362077560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:35:51,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:35:51,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:35:51,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377037353] [2021-08-13 02:35:51,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:35:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:35:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:35:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:35:51,280 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-08-13 02:35:51,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:35:51,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-08-13 02:35:51,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:35:51,872 INFO L129 PetriNetUnfolder]: 2852/5054 cut-off events. [2021-08-13 02:35:51,876 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:51,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9576 conditions, 5054 events. 2852/5054 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37317 event pairs, 882 based on Foata normal form. 0/4171 useless extension candidates. Maximal degree in co-relation 9540. Up to 1413 conditions per place. [2021-08-13 02:35:51,923 INFO L132 encePairwiseOnDemand]: 13/27 looper letters, 38 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2021-08-13 02:35:51,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 274 flow [2021-08-13 02:35:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:35:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:35:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-08-13 02:35:51,930 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8074074074074075 [2021-08-13 02:35:51,930 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-08-13 02:35:51,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-08-13 02:35:51,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:35:51,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-08-13 02:35:51,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,934 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,934 INFO L348 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2021-08-13 02:35:51,934 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 65 transitions, 274 flow [2021-08-13 02:35:51,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:51,934 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:51,934 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-13 02:35:51,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 02:35:51,934 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1161010669, now seen corresponding path program 1 times [2021-08-13 02:35:51,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:51,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12427876] [2021-08-13 02:35:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:35:51,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:51,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:51,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:51,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:51,998 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:35:52,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:35:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:35:52,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:35:52,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12427876] [2021-08-13 02:35:52,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12427876] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:35:52,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:35:52,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:35:52,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103530007] [2021-08-13 02:35:52,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:35:52,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:35:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:35:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:35:52,007 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-08-13 02:35:52,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 65 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:52,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:35:52,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-08-13 02:35:52,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:35:52,891 INFO L129 PetriNetUnfolder]: 5089/9213 cut-off events. [2021-08-13 02:35:52,891 INFO L130 PetriNetUnfolder]: For 25/61 co-relation queries the response was YES. [2021-08-13 02:35:52,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25585 conditions, 9213 events. 5089/9213 cut-off events. For 25/61 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 76906 event pairs, 1178 based on Foata normal form. 1/7703 useless extension candidates. Maximal degree in co-relation 25215. Up to 2374 conditions per place. [2021-08-13 02:35:52,983 INFO L132 encePairwiseOnDemand]: 13/27 looper letters, 95 selfloop transitions, 50 changer transitions 0/154 dead transitions. [2021-08-13 02:35:52,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 154 transitions, 923 flow [2021-08-13 02:35:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:35:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:35:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2021-08-13 02:35:52,988 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7851851851851852 [2021-08-13 02:35:52,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2021-08-13 02:35:52,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2021-08-13 02:35:52,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:35:52,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2021-08-13 02:35:52,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:52,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:52,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:52,991 INFO L348 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2021-08-13 02:35:52,991 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 154 transitions, 923 flow [2021-08-13 02:35:52,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:52,991 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:52,991 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-13 02:35:52,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 02:35:52,991 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1160997765, now seen corresponding path program 1 times [2021-08-13 02:35:52,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:52,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200845172] [2021-08-13 02:35:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:53,001 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:35:53,006 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:35:53,010 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:35:53,011 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:35:53,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 02:35:53,011 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:35:53,011 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-13 02:35:53,017 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,017 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,017 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,017 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,018 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,018 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,019 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,019 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,019 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,019 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,019 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,020 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,020 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,020 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,020 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,020 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,024 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,024 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,025 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,025 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,025 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,026 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,027 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,027 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,028 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:35:53,029 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:35:53,029 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-13 02:35:53,030 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:35:53,030 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:35:53,030 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:35:53,030 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:35:53,030 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:35:53,030 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:35:53,030 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:35:53,030 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:35:53,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-08-13 02:35:53,035 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-08-13 02:35:53,035 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:53,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 115 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-08-13 02:35:53,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 33 transitions, 111 flow [2021-08-13 02:35:53,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 33 transitions, 111 flow [2021-08-13 02:35:53,038 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-08-13 02:35:53,038 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:53,038 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:53,039 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:35:53,039 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:53,040 INFO L82 PathProgramCache]: Analyzing trace with hash 132714962, now seen corresponding path program 1 times [2021-08-13 02:35:53,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:53,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025986091] [2021-08-13 02:35:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:35:53,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:53,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:53,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:53,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:53,083 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:35:53,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:35:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:35:53,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:35:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025986091] [2021-08-13 02:35:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025986091] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:35:53,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:35:53,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:35:53,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610103352] [2021-08-13 02:35:53,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:35:53,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:35:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:35:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:35:53,091 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 33 [2021-08-13 02:35:53,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:53,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:35:53,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 33 [2021-08-13 02:35:53,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:35:55,649 INFO L129 PetriNetUnfolder]: 22065/34223 cut-off events. [2021-08-13 02:35:55,664 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:35:55,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65388 conditions, 34223 events. 22065/34223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2093. Compared 270231 event pairs, 6846 based on Foata normal form. 0/28585 useless extension candidates. Maximal degree in co-relation 65342. Up to 10043 conditions per place. [2021-08-13 02:35:56,123 INFO L132 encePairwiseOnDemand]: 16/33 looper letters, 48 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2021-08-13 02:35:56,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 81 transitions, 347 flow [2021-08-13 02:35:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:35:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:35:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2021-08-13 02:35:56,125 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-08-13 02:35:56,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2021-08-13 02:35:56,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2021-08-13 02:35:56,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:35:56,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2021-08-13 02:35:56,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:56,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:56,126 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:56,126 INFO L348 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2021-08-13 02:35:56,126 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 81 transitions, 347 flow [2021-08-13 02:35:56,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:56,127 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:35:56,127 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-13 02:35:56,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 02:35:56,127 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:35:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:35:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -179995026, now seen corresponding path program 1 times [2021-08-13 02:35:56,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:35:56,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120317165] [2021-08-13 02:35:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:35:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:35:56,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:56,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:56,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:35:56,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:35:56,147 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:35:56,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:35:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:35:56,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:35:56,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120317165] [2021-08-13 02:35:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120317165] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:35:56,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:35:56,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:35:56,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636780824] [2021-08-13 02:35:56,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:35:56,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:35:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:35:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:35:56,150 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 33 [2021-08-13 02:35:56,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 81 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:35:56,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:35:56,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 33 [2021-08-13 02:35:56,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:01,629 INFO L129 PetriNetUnfolder]: 41526/65262 cut-off events. [2021-08-13 02:36:01,630 INFO L130 PetriNetUnfolder]: For 31/209 co-relation queries the response was YES. [2021-08-13 02:36:01,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183515 conditions, 65262 events. 41526/65262 cut-off events. For 31/209 co-relation queries the response was YES. Maximal size of possible extension queue 4154. Compared 571070 event pairs, 9757 based on Foata normal form. 9/55249 useless extension candidates. Maximal degree in co-relation 183441. Up to 17974 conditions per place. [2021-08-13 02:36:02,434 INFO L132 encePairwiseOnDemand]: 16/33 looper letters, 123 selfloop transitions, 62 changer transitions 0/196 dead transitions. [2021-08-13 02:36:02,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 196 transitions, 1180 flow [2021-08-13 02:36:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:36:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:36:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2021-08-13 02:36:02,436 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.793939393939394 [2021-08-13 02:36:02,436 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 131 transitions. [2021-08-13 02:36:02,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 131 transitions. [2021-08-13 02:36:02,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:02,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 131 transitions. [2021-08-13 02:36:02,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:02,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:02,437 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:02,437 INFO L348 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2021-08-13 02:36:02,437 INFO L482 AbstractCegarLoop]: Abstraction has has 52 places, 196 transitions, 1180 flow [2021-08-13 02:36:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:02,437 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:02,438 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:02,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-13 02:36:02,438 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1284170360, now seen corresponding path program 1 times [2021-08-13 02:36:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:02,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093093661] [2021-08-13 02:36:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:02,441 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:02,442 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:02,443 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:02,443 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:02,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 02:36:02,444 WARN L235 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:02,444 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-08-13 02:36:02,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,449 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,449 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,449 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,450 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,451 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,452 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,453 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,453 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,454 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,456 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,456 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:02,457 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:02,457 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-13 02:36:02,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:02,458 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:02,458 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:02,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:02,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:02,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:02,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:02,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:02,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-08-13 02:36:02,461 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-08-13 02:36:02,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:02,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 151 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-08-13 02:36:02,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 39 transitions, 138 flow [2021-08-13 02:36:02,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 138 flow [2021-08-13 02:36:02,462 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 02:36:02,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:02,462 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:02,462 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:02,462 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash 170106637, now seen corresponding path program 1 times [2021-08-13 02:36:02,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:02,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204738965] [2021-08-13 02:36:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:02,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:02,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:02,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:02,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:02,482 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:36:02,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:02,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:02,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204738965] [2021-08-13 02:36:02,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204738965] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:02,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:02,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:36:02,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928896360] [2021-08-13 02:36:02,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:36:02,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:36:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:36:02,486 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2021-08-13 02:36:02,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:02,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:02,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2021-08-13 02:36:02,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:34,139 INFO L129 PetriNetUnfolder]: 151182/216132 cut-off events. [2021-08-13 02:36:34,143 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:35,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 415569 conditions, 216132 events. 151182/216132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10216. Compared 1786592 event pairs, 46742 based on Foata normal form. 0/182063 useless extension candidates. Maximal degree in co-relation 415512. Up to 64869 conditions per place. [2021-08-13 02:36:36,295 INFO L132 encePairwiseOnDemand]: 19/39 looper letters, 58 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2021-08-13 02:36:36,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 422 flow [2021-08-13 02:36:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:36:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:36:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-08-13 02:36:36,301 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8256410256410256 [2021-08-13 02:36:36,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-08-13 02:36:36,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-08-13 02:36:36,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:36,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-08-13 02:36:36,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,306 INFO L348 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2021-08-13 02:36:36,306 INFO L482 AbstractCegarLoop]: Abstraction has has 56 places, 97 transitions, 422 flow [2021-08-13 02:36:36,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,307 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:36,307 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-13 02:36:36,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 02:36:36,307 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 978536248, now seen corresponding path program 1 times [2021-08-13 02:36:36,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:36,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403708097] [2021-08-13 02:36:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:36,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:36,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:36,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:36,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:36,343 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:36:36,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:36:36,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:36,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403708097] [2021-08-13 02:36:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403708097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:36,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:36,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:36:36,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102423097] [2021-08-13 02:36:36,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:36:36,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:36:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:36:36,346 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2021-08-13 02:36:36,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 97 transitions, 422 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:36,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:36,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2021-08-13 02:36:36,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:38:24,931 INFO L129 PetriNetUnfolder]: 290971/418422 cut-off events. [2021-08-13 02:38:24,932 INFO L130 PetriNetUnfolder]: For 84/1152 co-relation queries the response was YES. [2021-08-13 02:38:27,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1190342 conditions, 418422 events. 290971/418422 cut-off events. For 84/1152 co-relation queries the response was YES. Maximal size of possible extension queue 20147. Compared 3736153 event pairs, 64014 based on Foata normal form. 15/356949 useless extension candidates. Maximal degree in co-relation 1189764. Up to 119346 conditions per place. [2021-08-13 02:38:29,589 INFO L132 encePairwiseOnDemand]: 19/39 looper letters, 151 selfloop transitions, 74 changer transitions 0/238 dead transitions. [2021-08-13 02:38:29,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 238 transitions, 1439 flow [2021-08-13 02:38:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:38:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:38:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-08-13 02:38:29,591 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-08-13 02:38:29,591 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-08-13 02:38:29,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-08-13 02:38:29,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:38:29,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-08-13 02:38:29,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:29,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:29,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:29,593 INFO L348 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2021-08-13 02:38:29,593 INFO L482 AbstractCegarLoop]: Abstraction has has 60 places, 238 transitions, 1439 flow [2021-08-13 02:38:29,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:29,593 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:38:29,593 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:38:29,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 02:38:29,593 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:38:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:38:29,595 INFO L82 PathProgramCache]: Analyzing trace with hash 270378104, now seen corresponding path program 1 times [2021-08-13 02:38:29,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:38:29,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675033098] [2021-08-13 02:38:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:38:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:38:29,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:29,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:38:29,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:38:29,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:38:29,651 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-08-13 02:38:29,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:38:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-13 02:38:29,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:38:29,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675033098] [2021-08-13 02:38:29,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675033098] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:38:29,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:38:29,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-13 02:38:29,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143477453] [2021-08-13 02:38:29,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:38:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:38:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:38:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:38:29,655 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2021-08-13 02:38:29,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 238 transitions, 1439 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:38:29,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:38:29,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2021-08-13 02:38:29,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand