/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:26:10,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:26:10,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:26:10,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 04:26:10,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 04:26:10,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 04:26:10,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 04:26:10,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 04:26:10,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 04:26:10,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 04:26:10,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 04:26:10,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 04:26:10,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 04:26:10,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 04:26:10,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 04:26:10,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 04:26:10,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 04:26:10,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 04:26:10,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 04:26:10,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 04:26:10,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 04:26:10,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 04:26:10,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 04:26:10,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 04:26:10,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 04:26:10,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 04:26:10,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 04:26:10,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 04:26:10,851 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.epf [2021-03-11 04:26:10,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:26:10,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:26:10,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:26:10,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:26:10,881 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:26:10,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:26:10,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:26:10,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:26:10,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:26:10,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:26:10,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:26:10,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:26:10,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:26:10,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:26:10,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:26:10,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:26:10,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:26:10,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:26:10,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:26:10,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:26:10,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:26:10,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:26:10,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:26:10,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:26:10,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:26:10,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:26:10,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:26:10,884 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:26:10,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:26:10,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:26:11,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:26:11,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:26:11,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:26:11,148 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:26:11,149 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:26:11,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-03-11 04:26:11,149 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-03-11 04:26:11,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:26:11,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:26:11,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:26:11,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:26:11,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:26:11,184 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 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,190 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 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:26:11,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:26:11,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:26:11,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:26:11,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/1) ... [2021-03-11 04:26:11,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:26:11,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:26:11,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:26:11,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:26:11,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (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 [2021-03-11 04:26:11,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 04:26:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:26:11,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:26:11,255 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-11 04:26:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-11 04:26:11,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-11 04:26:11,256 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 04:26:11,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:26:11,338 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-11 04:26:11,339 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:26:11 BoogieIcfgContainer [2021-03-11 04:26:11,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:26:11,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:26:11,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:26:11,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:26:11,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:26:11" (1/2) ... [2021-03-11 04:26:11,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9f4867 and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:26:11, skipping insertion in model container [2021-03-11 04:26:11,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:26:11" (2/2) ... [2021-03-11 04:26:11,354 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-03-11 04:26:11,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:26:11,363 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 04:26:11,363 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:26:11,379 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,379 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,380 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,380 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,384 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,387 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:26:11,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 04:26:11,418 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:26:11,418 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:26:11,418 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:26:11,418 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:26:11,418 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:26:11,418 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:26:11,418 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:26:11,419 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:26:11,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 9 transitions, 23 flow [2021-03-11 04:26:11,433 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 04:26:11,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,434 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. [2021-03-11 04:26:11,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 9 transitions, 23 flow [2021-03-11 04:26:11,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 12 places, 9 transitions, 23 flow [2021-03-11 04:26:11,439 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-03-11 04:26:11,439 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,440 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:11,440 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-11 04:26:11,441 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:26:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-03-11 04:26:11,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:11,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158410686] [2021-03-11 04:26:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:11,492 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:11,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:11,505 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:26:11,505 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:26:11,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:26:11,506 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:26:11,506 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-11 04:26:11,509 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,510 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,510 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,510 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,510 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,511 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,511 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,511 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,511 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,512 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,513 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:26:11,513 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 04:26:11,515 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:26:11,515 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:26:11,515 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:26:11,515 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:26:11,515 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:26:11,515 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:26:11,515 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:26:11,515 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:26:11,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 04:26:11,519 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 04:26:11,519 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,519 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. [2021-03-11 04:26:11,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-03-11 04:26:11,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-03-11 04:26:11,522 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 04:26:11,522 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,522 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:11,522 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-11 04:26:11,522 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1773586, now seen corresponding path program 1 times [2021-03-11 04:26:11,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:11,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028398953] [2021-03-11 04:26:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:11,526 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:11,528 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:11,529 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:26:11,529 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:26:11,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:26:11,529 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:26:11,530 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-11 04:26:11,534 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,534 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,534 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,534 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,535 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,536 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,536 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,537 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,538 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,538 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:26:11,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 04:26:11,540 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:26:11,540 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:26:11,540 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:26:11,540 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:26:11,540 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:26:11,540 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:26:11,540 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:26:11,540 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:26:11,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 21 transitions, 63 flow [2021-03-11 04:26:11,545 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-11 04:26:11,545 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,546 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. [2021-03-11 04:26:11,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 21 transitions, 63 flow [2021-03-11 04:26:11,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 63 flow [2021-03-11 04:26:11,548 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 04:26:11,548 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,548 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:11,548 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:26:11,549 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash 75168682, now seen corresponding path program 1 times [2021-03-11 04:26:11,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:11,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950041732] [2021-03-11 04:26:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:11,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:11,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:11,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:11,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:11,652 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:11,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:26:11,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950041732] [2021-03-11 04:26:11,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:11,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:11,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891661672] [2021-03-11 04:26:11,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:11,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:11,686 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 21 [2021-03-11 04:26:11,688 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) [2021-03-11 04:26:11,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:11,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 21 [2021-03-11 04:26:11,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:26:11,872 INFO L129 PetriNetUnfolder]: 291/669 cut-off events. [2021-03-11 04:26:11,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,880 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. [2021-03-11 04:26:11,885 INFO L132 encePairwiseOnDemand]: 10/21 looper letters, 28 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2021-03-11 04:26:11,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 49 transitions, 203 flow [2021-03-11 04:26:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:26:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:26:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2021-03-11 04:26:11,892 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7904761904761904 [2021-03-11 04:26:11,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2021-03-11 04:26:11,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2021-03-11 04:26:11,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:26:11,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2021-03-11 04:26:11,904 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) [2021-03-11 04:26:11,906 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) [2021-03-11 04:26:11,906 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) [2021-03-11 04:26:11,908 INFO L185 Difference]: Start difference. First operand has 28 places, 21 transitions, 63 flow. Second operand 5 states and 83 transitions. [2021-03-11 04:26:11,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 49 transitions, 203 flow [2021-03-11 04:26:11,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 197 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-11 04:26:11,912 INFO L241 Difference]: Finished difference. Result has 36 places, 34 transitions, 177 flow [2021-03-11 04:26:11,913 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2021-03-11 04:26:11,913 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2021-03-11 04:26:11,913 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 177 flow [2021-03-11 04:26:11,913 INFO L481 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) [2021-03-11 04:26:11,913 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:11,914 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:26:11,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 04:26:11,914 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:11,914 INFO L82 PathProgramCache]: Analyzing trace with hash 75175629, now seen corresponding path program 1 times [2021-03-11 04:26:11,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:11,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518579951] [2021-03-11 04:26:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:11,918 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:11,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:11,920 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:26:11,920 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:26:11,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 04:26:11,920 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:26:11,921 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-11 04:26:11,924 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,925 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,926 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,926 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,926 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,926 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,926 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,926 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,927 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,927 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,927 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,928 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,929 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,929 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:11,930 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:26:11,930 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 04:26:11,931 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:26:11,931 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:26:11,931 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:26:11,931 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:26:11,931 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:26:11,931 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:26:11,931 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:26:11,931 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:26:11,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 27 transitions, 86 flow [2021-03-11 04:26:11,935 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-11 04:26:11,935 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,935 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. [2021-03-11 04:26:11,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 27 transitions, 86 flow [2021-03-11 04:26:11,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 27 transitions, 86 flow [2021-03-11 04:26:11,936 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 04:26:11,937 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:11,937 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:11,937 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:26:11,937 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash 101078907, now seen corresponding path program 1 times [2021-03-11 04:26:11,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:11,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033595642] [2021-03-11 04:26:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:11,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:11,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:11,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:11,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:11,965 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:11,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:26:11,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033595642] [2021-03-11 04:26:11,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:11,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:11,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958173020] [2021-03-11 04:26:11,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:11,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:11,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:11,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:11,974 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-03-11 04:26:11,974 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) [2021-03-11 04:26:11,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:11,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-03-11 04:26:11,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:26:12,423 INFO L129 PetriNetUnfolder]: 2852/5054 cut-off events. [2021-03-11 04:26:12,423 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:12,436 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. [2021-03-11 04:26:12,463 INFO L132 encePairwiseOnDemand]: 13/27 looper letters, 38 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2021-03-11 04:26:12,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 274 flow [2021-03-11 04:26:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:26:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:26:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2021-03-11 04:26:12,465 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8074074074074075 [2021-03-11 04:26:12,465 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 109 transitions. [2021-03-11 04:26:12,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 109 transitions. [2021-03-11 04:26:12,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:26:12,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 109 transitions. [2021-03-11 04:26:12,466 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) [2021-03-11 04:26:12,466 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) [2021-03-11 04:26:12,467 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) [2021-03-11 04:26:12,467 INFO L185 Difference]: Start difference. First operand has 36 places, 27 transitions, 86 flow. Second operand 5 states and 109 transitions. [2021-03-11 04:26:12,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 274 flow [2021-03-11 04:26:12,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 65 transitions, 262 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-11 04:26:12,469 INFO L241 Difference]: Finished difference. Result has 44 places, 44 transitions, 230 flow [2021-03-11 04:26:12,469 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2021-03-11 04:26:12,469 INFO L335 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2021-03-11 04:26:12,469 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 230 flow [2021-03-11 04:26:12,469 INFO L481 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) [2021-03-11 04:26:12,469 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:12,469 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 04:26:12,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 04:26:12,469 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1161010669, now seen corresponding path program 1 times [2021-03-11 04:26:12,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:12,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599181089] [2021-03-11 04:26:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:12,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:12,480 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:12,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:12,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:12,490 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:12,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:26:12,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599181089] [2021-03-11 04:26:12,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:12,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:12,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065149802] [2021-03-11 04:26:12,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:12,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:12,494 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-03-11 04:26:12,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 230 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) [2021-03-11 04:26:12,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:12,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-03-11 04:26:12,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:26:13,220 INFO L129 PetriNetUnfolder]: 5089/9187 cut-off events. [2021-03-11 04:26:13,220 INFO L130 PetriNetUnfolder]: For 3706/3706 co-relation queries the response was YES. [2021-03-11 04:26:13,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31086 conditions, 9187 events. 5089/9187 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 76678 event pairs, 1376 based on Foata normal form. 345/9528 useless extension candidates. Maximal degree in co-relation 19591. Up to 3282 conditions per place. [2021-03-11 04:26:13,294 INFO L132 encePairwiseOnDemand]: 13/27 looper letters, 56 selfloop transitions, 45 changer transitions 0/110 dead transitions. [2021-03-11 04:26:13,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 110 transitions, 797 flow [2021-03-11 04:26:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:26:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:26:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2021-03-11 04:26:13,298 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7851851851851852 [2021-03-11 04:26:13,298 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 106 transitions. [2021-03-11 04:26:13,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 106 transitions. [2021-03-11 04:26:13,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:26:13,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 106 transitions. [2021-03-11 04:26:13,300 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) [2021-03-11 04:26:13,301 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) [2021-03-11 04:26:13,301 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) [2021-03-11 04:26:13,301 INFO L185 Difference]: Start difference. First operand has 44 places, 44 transitions, 230 flow. Second operand 5 states and 106 transitions. [2021-03-11 04:26:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 110 transitions, 797 flow [2021-03-11 04:26:13,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 110 transitions, 797 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 04:26:13,363 INFO L241 Difference]: Finished difference. Result has 52 places, 85 transitions, 720 flow [2021-03-11 04:26:13,363 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=52, PETRI_TRANSITIONS=85} [2021-03-11 04:26:13,364 INFO L335 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2021-03-11 04:26:13,364 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 85 transitions, 720 flow [2021-03-11 04:26:13,364 INFO L481 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) [2021-03-11 04:26:13,364 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:13,364 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 04:26:13,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 04:26:13,365 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1160997765, now seen corresponding path program 1 times [2021-03-11 04:26:13,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:13,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104384713] [2021-03-11 04:26:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:13,368 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:13,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:13,370 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:26:13,370 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:26:13,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 04:26:13,371 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:26:13,373 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-11 04:26:13,377 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,377 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,378 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,379 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,379 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,379 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,380 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,380 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,380 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,380 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,383 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,385 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,386 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,386 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:13,387 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:26:13,387 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-11 04:26:13,388 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:26:13,388 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:26:13,388 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:26:13,388 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:26:13,388 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:26:13,388 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:26:13,388 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:26:13,388 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:26:13,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 33 transitions, 111 flow [2021-03-11 04:26:13,393 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 04:26:13,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:13,395 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. [2021-03-11 04:26:13,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 33 transitions, 111 flow [2021-03-11 04:26:13,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 33 transitions, 111 flow [2021-03-11 04:26:13,396 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-11 04:26:13,396 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:13,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:13,397 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:26:13,397 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash 132714962, now seen corresponding path program 1 times [2021-03-11 04:26:13,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:13,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973637225] [2021-03-11 04:26:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:13,421 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:13,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:13,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:13,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:13,436 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:13,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:26:13,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973637225] [2021-03-11 04:26:13,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:13,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:13,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305341059] [2021-03-11 04:26:13,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:13,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:13,442 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 33 [2021-03-11 04:26:13,442 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) [2021-03-11 04:26:13,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:13,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 33 [2021-03-11 04:26:13,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:26:15,710 INFO L129 PetriNetUnfolder]: 22065/34223 cut-off events. [2021-03-11 04:26:15,710 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:15,795 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. [2021-03-11 04:26:15,955 INFO L132 encePairwiseOnDemand]: 16/33 looper letters, 48 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2021-03-11 04:26:15,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 81 transitions, 347 flow [2021-03-11 04:26:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:26:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:26:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2021-03-11 04:26:15,956 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-03-11 04:26:15,956 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2021-03-11 04:26:15,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2021-03-11 04:26:15,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:26:15,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2021-03-11 04:26:15,957 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) [2021-03-11 04:26:15,958 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) [2021-03-11 04:26:15,958 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) [2021-03-11 04:26:15,958 INFO L185 Difference]: Start difference. First operand has 44 places, 33 transitions, 111 flow. Second operand 5 states and 135 transitions. [2021-03-11 04:26:15,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 81 transitions, 347 flow [2021-03-11 04:26:15,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 327 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-03-11 04:26:15,960 INFO L241 Difference]: Finished difference. Result has 52 places, 54 transitions, 283 flow [2021-03-11 04:26:15,960 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2021-03-11 04:26:15,960 INFO L335 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2021-03-11 04:26:15,960 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 283 flow [2021-03-11 04:26:15,960 INFO L481 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) [2021-03-11 04:26:15,960 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:15,960 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 04:26:15,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 04:26:15,961 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -179995026, now seen corresponding path program 1 times [2021-03-11 04:26:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:15,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901047881] [2021-03-11 04:26:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:15,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:15,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:15,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:15,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:15,997 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:15,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:26:16,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901047881] [2021-03-11 04:26:16,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:16,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:16,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855516141] [2021-03-11 04:26:16,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:16,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:16,002 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 33 [2021-03-11 04:26:16,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 283 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) [2021-03-11 04:26:16,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:16,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 33 [2021-03-11 04:26:16,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:26:21,491 INFO L129 PetriNetUnfolder]: 41526/65278 cut-off events. [2021-03-11 04:26:21,491 INFO L130 PetriNetUnfolder]: For 24287/24287 co-relation queries the response was YES. [2021-03-11 04:26:21,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219777 conditions, 65278 events. 41526/65278 cut-off events. For 24287/24287 co-relation queries the response was YES. Maximal size of possible extension queue 4139. Compared 572841 event pairs, 15155 based on Foata normal form. 2010/67267 useless extension candidates. Maximal degree in co-relation 140562. Up to 23529 conditions per place. [2021-03-11 04:26:22,033 INFO L132 encePairwiseOnDemand]: 16/33 looper letters, 70 selfloop transitions, 56 changer transitions 0/137 dead transitions. [2021-03-11 04:26:22,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 137 transitions, 990 flow [2021-03-11 04:26:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:26:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:26:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2021-03-11 04:26:22,035 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.793939393939394 [2021-03-11 04:26:22,035 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 131 transitions. [2021-03-11 04:26:22,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 131 transitions. [2021-03-11 04:26:22,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:26:22,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 131 transitions. [2021-03-11 04:26:22,036 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) [2021-03-11 04:26:22,037 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) [2021-03-11 04:26:22,037 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) [2021-03-11 04:26:22,037 INFO L185 Difference]: Start difference. First operand has 52 places, 54 transitions, 283 flow. Second operand 5 states and 131 transitions. [2021-03-11 04:26:22,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 137 transitions, 990 flow [2021-03-11 04:26:22,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 137 transitions, 990 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 04:26:22,191 INFO L241 Difference]: Finished difference. Result has 60 places, 105 transitions, 893 flow [2021-03-11 04:26:22,191 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=893, PETRI_PLACES=60, PETRI_TRANSITIONS=105} [2021-03-11 04:26:22,191 INFO L335 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2021-03-11 04:26:22,192 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 105 transitions, 893 flow [2021-03-11 04:26:22,192 INFO L481 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) [2021-03-11 04:26:22,192 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:22,192 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:26:22,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 04:26:22,192 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1284170360, now seen corresponding path program 1 times [2021-03-11 04:26:22,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:22,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352128779] [2021-03-11 04:26:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:22,200 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:26:22,206 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:26:22,211 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:26:22,211 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:26:22,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 04:26:22,211 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-11 04:26:22,211 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,217 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,218 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,219 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,347 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,347 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,347 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,347 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,348 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,349 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,350 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,352 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,353 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:26:22,353 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:26:22,353 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-11 04:26:22,354 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:26:22,354 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:26:22,354 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:26:22,354 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:26:22,354 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:26:22,354 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:26:22,354 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:26:22,354 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:26:22,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 52 places, 39 transitions, 138 flow [2021-03-11 04:26:22,357 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-11 04:26:22,357 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:22,357 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. [2021-03-11 04:26:22,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 39 transitions, 138 flow [2021-03-11 04:26:22,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 138 flow [2021-03-11 04:26:22,358 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 04:26:22,358 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:22,358 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:22,358 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 04:26:22,358 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash 170106637, now seen corresponding path program 1 times [2021-03-11 04:26:22,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:22,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554073821] [2021-03-11 04:26:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:22,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:22,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:22,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:22,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:22,394 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:22,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:26:22,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554073821] [2021-03-11 04:26:22,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:22,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:22,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35186059] [2021-03-11 04:26:22,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:22,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:22,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:22,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:22,400 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2021-03-11 04:26:22,400 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) [2021-03-11 04:26:22,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:22,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2021-03-11 04:26:22,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:26:46,846 INFO L129 PetriNetUnfolder]: 151182/216132 cut-off events. [2021-03-11 04:26:46,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:26:47,883 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. [2021-03-11 04:26:48,873 INFO L132 encePairwiseOnDemand]: 19/39 looper letters, 58 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2021-03-11 04:26:48,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 422 flow [2021-03-11 04:26:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:26:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:26:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-03-11 04:26:48,875 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8256410256410256 [2021-03-11 04:26:48,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-03-11 04:26:48,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-03-11 04:26:48,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:26:48,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-03-11 04:26:48,875 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) [2021-03-11 04:26:48,876 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) [2021-03-11 04:26:48,876 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) [2021-03-11 04:26:48,876 INFO L185 Difference]: Start difference. First operand has 52 places, 39 transitions, 138 flow. Second operand 5 states and 161 transitions. [2021-03-11 04:26:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 422 flow [2021-03-11 04:26:48,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 392 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-03-11 04:26:48,877 INFO L241 Difference]: Finished difference. Result has 60 places, 64 transitions, 336 flow [2021-03-11 04:26:48,878 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2021-03-11 04:26:48,878 INFO L335 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2021-03-11 04:26:48,878 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 336 flow [2021-03-11 04:26:48,878 INFO L481 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) [2021-03-11 04:26:48,878 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:26:48,878 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 04:26:48,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 04:26:48,878 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:26:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:26:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 978536248, now seen corresponding path program 1 times [2021-03-11 04:26:48,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:26:48,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364840580] [2021-03-11 04:26:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:26:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:26:48,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:48,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:48,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:26:48,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:26:48,895 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:26:48,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:26:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:26:48,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364840580] [2021-03-11 04:26:48,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:26:48,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:26:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908928761] [2021-03-11 04:26:48,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:26:48,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:26:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:26:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:26:48,898 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2021-03-11 04:26:48,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 336 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) [2021-03-11 04:26:48,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:26:48,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2021-03-11 04:26:48,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:28:18,862 INFO L129 PetriNetUnfolder]: 290971/418560 cut-off events. [2021-03-11 04:28:18,863 INFO L130 PetriNetUnfolder]: For 164414/164414 co-relation queries the response was YES. [2021-03-11 04:28:20,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1411282 conditions, 418560 events. 290971/418560 cut-off events. For 164414/164414 co-relation queries the response was YES. Maximal size of possible extension queue 20256. Compared 3753946 event pairs, 77176 based on Foata normal form. 11295/429805 useless extension candidates. Maximal degree in co-relation 1411228. Up to 151596 conditions per place. [2021-03-11 04:28:22,845 INFO L132 encePairwiseOnDemand]: 19/39 looper letters, 84 selfloop transitions, 67 changer transitions 0/164 dead transitions. [2021-03-11 04:28:22,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 164 transitions, 1183 flow [2021-03-11 04:28:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:28:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:28:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-11 04:28:22,847 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-03-11 04:28:22,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-11 04:28:22,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-11 04:28:22,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:28:22,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-11 04:28:22,847 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) [2021-03-11 04:28:22,847 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) [2021-03-11 04:28:22,848 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) [2021-03-11 04:28:22,848 INFO L185 Difference]: Start difference. First operand has 60 places, 64 transitions, 336 flow. Second operand 5 states and 156 transitions. [2021-03-11 04:28:22,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 164 transitions, 1183 flow [2021-03-11 04:28:24,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 164 transitions, 1183 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 04:28:24,414 INFO L241 Difference]: Finished difference. Result has 68 places, 125 transitions, 1066 flow [2021-03-11 04:28:24,414 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1066, PETRI_PLACES=68, PETRI_TRANSITIONS=125} [2021-03-11 04:28:24,414 INFO L335 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2021-03-11 04:28:24,414 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 125 transitions, 1066 flow [2021-03-11 04:28:24,414 INFO L481 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) [2021-03-11 04:28:24,414 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:28:24,414 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:28:24,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 04:28:24,415 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:28:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:28:24,415 INFO L82 PathProgramCache]: Analyzing trace with hash 270378104, now seen corresponding path program 1 times [2021-03-11 04:28:24,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:28:24,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668537670] [2021-03-11 04:28:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:28:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:28:24,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:28:24,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:28:24,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:28:24,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:28:24,452 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:28:24,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:28:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 04:28:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668537670] [2021-03-11 04:28:24,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:28:24,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:28:24,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82886071] [2021-03-11 04:28:24,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:28:24,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:28:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:28:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:28:24,455 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2021-03-11 04:28:24,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 125 transitions, 1066 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) [2021-03-11 04:28:24,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:28:24,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2021-03-11 04:28:24,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:33:42,299 INFO L129 PetriNetUnfolder]: 534473/765354 cut-off events. [2021-03-11 04:33:42,307 INFO L130 PetriNetUnfolder]: For 1201931/1201934 co-relation queries the response was YES. [2021-03-11 04:33:46,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3559179 conditions, 765354 events. 534473/765354 cut-off events. For 1201931/1201934 co-relation queries the response was YES. Maximal size of possible extension queue 37234. Compared 7219366 event pairs, 125392 based on Foata normal form. 20284/785577 useless extension candidates. Maximal degree in co-relation 3559148. Up to 279467 conditions per place. [2021-03-11 04:33:51,059 INFO L132 encePairwiseOnDemand]: 19/39 looper letters, 114 selfloop transitions, 152 changer transitions 0/279 dead transitions. [2021-03-11 04:33:51,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 279 transitions, 2963 flow [2021-03-11 04:33:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:33:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:33:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2021-03-11 04:33:51,061 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-03-11 04:33:51,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2021-03-11 04:33:51,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2021-03-11 04:33:51,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:33:51,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2021-03-11 04:33:51,063 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) [2021-03-11 04:33:51,064 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) [2021-03-11 04:33:51,064 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) [2021-03-11 04:33:51,064 INFO L185 Difference]: Start difference. First operand has 68 places, 125 transitions, 1066 flow. Second operand 5 states and 156 transitions. [2021-03-11 04:33:51,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 279 transitions, 2963 flow [2021-03-11 04:34:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 279 transitions, 2963 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 04:34:03,885 INFO L241 Difference]: Finished difference. Result has 75 places, 234 transitions, 2743 flow [2021-03-11 04:34:03,885 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2743, PETRI_PLACES=75, PETRI_TRANSITIONS=234} [2021-03-11 04:34:03,885 INFO L335 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2021-03-11 04:34:03,885 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 234 transitions, 2743 flow [2021-03-11 04:34:03,886 INFO L481 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) [2021-03-11 04:34:03,886 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:34:03,895 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:34:03,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 04:34:03,895 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:34:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:34:03,896 INFO L82 PathProgramCache]: Analyzing trace with hash -414268615, now seen corresponding path program 1 times [2021-03-11 04:34:03,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:34:03,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549662261] [2021-03-11 04:34:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:34:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:34:03,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:34:03,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:34:03,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:34:03,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:34:03,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:34:03,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:34:03,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:34:03,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:34:03,968 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 04:34:03,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:34:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 04:34:03,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549662261] [2021-03-11 04:34:03,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:34:03,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:34:03,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080326601] [2021-03-11 04:34:03,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 04:34:03,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:34:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 04:34:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 04:34:03,984 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2021-03-11 04:34:03,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 234 transitions, 2743 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:34:03,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:34:03,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2021-03-11 04:34:03,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown [2021-03-11 04:38:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 04:38:41,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 04:38:41,900 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 04:38:41,917 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 04:38:41,918 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:38:41 BasicIcfg [2021-03-11 04:38:41,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:38:41,918 INFO L168 Benchmark]: Toolchain (without parser) took 750745.95 ms. Allocated memory was 255.9 MB in the beginning and 13.8 GB in the end (delta: 13.5 GB). Free memory was 236.5 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 7.6 GB. Max. memory is 16.0 GB. [2021-03-11 04:38:41,919 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:38:41,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.74 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:38:41,919 INFO L168 Benchmark]: Boogie Preprocessor took 10.54 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 904.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:38:41,919 INFO L168 Benchmark]: RCFGBuilder took 133.39 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 225.9 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-03-11 04:38:41,920 INFO L168 Benchmark]: TraceAbstraction took 750577.28 ms. Allocated memory was 255.9 MB in the beginning and 13.8 GB in the end (delta: 13.5 GB). Free memory was 225.5 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 7.6 GB. Max. memory is 16.0 GB. [2021-03-11 04:38:41,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.74 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.54 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 904.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 133.39 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 225.9 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 750577.28 ms. Allocated memory was 255.9 MB in the beginning and 13.8 GB in the end (delta: 13.5 GB). Free memory was 225.5 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 7.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 19). Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (5states, 12/39 universal loopers) in iteration 4,while PetriNetUnfolder was constructing finite prefix that currently has 4229547 conditions, 771431 events (558851/771430 cut-off events. For 2153716/2153716 co-relation queries the response was YES. Maximal size of possible extension queue 50553. Compared 7107886 event pairs, 144420 based on Foata normal form. 10582/821337 useless extension candidates. Maximal degree in co-relation 4229474. Up to 278820 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. Started 6 CEGAR loops. EmptinessCheckTime: 9.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 750295.3ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 749674.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 284 SDtfs, 351 SDslu, 193 SDs, 0 SdLazy, 580 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 438.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 239.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2743occurred in iteration=3, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.6ms SsaConstructionTime, 46.7ms SatisfiabilityAnalysisTime, 359.4ms InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 7/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout !SESSION 2021-03-11 04:26:09.789 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9.1 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl !ENTRY org.eclipse.osgi 4 0 2021-03-11 04:38:42.165 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c796daf/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c796daf/.metadata/.log.