/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/weaver-benchmarks/generated/parallel/barrier-loop.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 06:14:43,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 06:14:43,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 06:14:44,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 06:14:44,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 06:14:44,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 06:14:44,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 06:14:44,036 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 06:14:44,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 06:14:44,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 06:14:44,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 06:14:44,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 06:14:44,051 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 06:14:44,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 06:14:44,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 06:14:44,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 06:14:44,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 06:14:44,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 06:14:44,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 06:14:44,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:14:44,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 06:14:44,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 06:14:44,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 06:14:44,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 06:14:44,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 06:14:44,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 06:14:44,266 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 06:14:44,267 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 06:14:44,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier-loop.wvr.bpl [2021-03-11 06:14:44,268 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier-loop.wvr.bpl' [2021-03-11 06:14:44,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 06:14:44,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 06:14:44,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 06:14:44,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 06:14:44,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 06:14:44,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 06:14:44,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 06:14:44,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 06:14:44,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 06:14:44,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/1) ... [2021-03-11 06:14:44,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 06:14:44,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 06:14:44,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 06:14:44,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 06:14:44,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (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 06:14:44,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 06:14:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 06:14:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 06:14:44,429 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 06:14:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 06:14:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 06:14:44,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 06:14:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 06:14:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 06:14:44,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 06:14:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 06:14:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 06:14:44,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-11 06:14:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-11 06:14:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-11 06:14:44,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-03-11 06:14:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-03-11 06:14:44,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-03-11 06:14:44,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-03-11 06:14:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-03-11 06:14:44,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-03-11 06:14:44,433 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 06:14:44,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 06:14:44,630 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-11 06:14:44,631 INFO L202 PluginConnector]: Adding new model barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:14:44 BoogieIcfgContainer [2021-03-11 06:14:44,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 06:14:44,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 06:14:44,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 06:14:44,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 06:14:44,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:14:44" (1/2) ... [2021-03-11 06:14:44,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f072a00 and model type barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:14:44, skipping insertion in model container [2021-03-11 06:14:44,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:14:44" (2/2) ... [2021-03-11 06:14:44,645 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier-loop.wvr.bpl [2021-03-11 06:14:44,649 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 06:14:44,651 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 06:14:44,652 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 06:14:44,760 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-03-11 06:14:44,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-03-11 06:14:44,786 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 06:14:44,786 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 06:14:44,786 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 06:14:44,786 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 06:14:44,786 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 06:14:44,787 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 06:14:44,787 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 06:14:44,787 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 06:14:44,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 73 transitions, 218 flow [2021-03-11 06:14:44,816 INFO L129 PetriNetUnfolder]: 8/61 cut-off events. [2021-03-11 06:14:44,817 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 06:14:44,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 61 events. 8/61 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 71. Up to 3 conditions per place. [2021-03-11 06:14:44,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 73 transitions, 218 flow [2021-03-11 06:14:44,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 59 transitions, 166 flow [2021-03-11 06:14:44,834 INFO L129 PetriNetUnfolder]: 8/58 cut-off events. [2021-03-11 06:14:44,835 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 06:14:44,835 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:14:44,835 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:14:44,835 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:14:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:14:44,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1236506362, now seen corresponding path program 1 times [2021-03-11 06:14:44,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:14:44,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663356750] [2021-03-11 06:14:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:14:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:14:44,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:44,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:14:44,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:44,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:44,955 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 06:14:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663356750] [2021-03-11 06:14:44,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:14:44,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 06:14:44,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932865789] [2021-03-11 06:14:44,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 06:14:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:14:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 06:14:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 06:14:44,973 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 77 [2021-03-11 06:14:44,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 06:14:44,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:14:44,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 77 [2021-03-11 06:14:44,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:14:45,329 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([203] thread4EXIT-->L119: Formula: (and (= v_thread4Thread1of1ForFork3_thidvar0_4 4) (= v_thread4Thread1of1ForFork3_thidvar3_4 4) (= v_thread4Thread1of1ForFork3_thidvar1_4 4) (= v_thread4Thread1of1ForFork3_thidvar2_4 4)) InVars {thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} OutVars{thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} AuxVars[] AssignedVars[][60], [thread3Thread1of1ForFork1NotInUse, thread5Thread1of1ForFork4NotInUse, thread4Thread1of1ForFork3NotInUse, thread1Thread1of1ForFork2NotInUse, 88#true, 72#L119true, thread6Thread1of1ForFork5NotInUse, thread2Thread1of1ForFork0NotInUse]) [2021-03-11 06:14:45,330 INFO L384 tUnfolder$Statistics]: this new event has 29 ancestors and is not cut-off event [2021-03-11 06:14:45,330 INFO L387 tUnfolder$Statistics]: existing Event has 37 ancestors and is not cut-off event [2021-03-11 06:14:45,330 INFO L387 tUnfolder$Statistics]: existing Event has 37 ancestors and is not cut-off event [2021-03-11 06:14:45,330 INFO L387 tUnfolder$Statistics]: existing Event has 29 ancestors and is not cut-off event [2021-03-11 06:14:45,354 INFO L129 PetriNetUnfolder]: 1975/3929 cut-off events. [2021-03-11 06:14:45,354 INFO L130 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2021-03-11 06:14:45,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6572 conditions, 3929 events. 1975/3929 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 29013 event pairs, 737 based on Foata normal form. 1/3650 useless extension candidates. Maximal degree in co-relation 6543. Up to 2309 conditions per place. [2021-03-11 06:14:45,394 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 21 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2021-03-11 06:14:45,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 234 flow [2021-03-11 06:14:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 06:14:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 06:14:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2021-03-11 06:14:45,405 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8701298701298701 [2021-03-11 06:14:45,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2021-03-11 06:14:45,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2021-03-11 06:14:45,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:14:45,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2021-03-11 06:14:45,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 06:14:45,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,420 INFO L185 Difference]: Start difference. First operand has 70 places, 59 transitions, 166 flow. Second operand 3 states and 201 transitions. [2021-03-11 06:14:45,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 234 flow [2021-03-11 06:14:45,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 202 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-03-11 06:14:45,438 INFO L241 Difference]: Finished difference. Result has 61 places, 63 transitions, 167 flow [2021-03-11 06:14:45,439 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2021-03-11 06:14:45,440 INFO L335 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2021-03-11 06:14:45,440 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 167 flow [2021-03-11 06:14:45,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 06:14:45,440 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:14:45,440 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:14:45,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 06:14:45,441 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:14:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:14:45,443 INFO L82 PathProgramCache]: Analyzing trace with hash -716341331, now seen corresponding path program 1 times [2021-03-11 06:14:45,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:14:45,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110764279] [2021-03-11 06:14:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:14:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:14:45,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,490 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-11 06:14:45,494 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:14:45,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110764279] [2021-03-11 06:14:45,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:14:45,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 06:14:45,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057074776] [2021-03-11 06:14:45,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 06:14:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:14:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 06:14:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 06:14:45,503 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 77 [2021-03-11 06:14:45,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:14:45,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 77 [2021-03-11 06:14:45,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:14:45,537 INFO L129 PetriNetUnfolder]: 101/345 cut-off events. [2021-03-11 06:14:45,537 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 06:14:45,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 345 events. 101/345 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1674 event pairs, 14 based on Foata normal form. 6/284 useless extension candidates. Maximal degree in co-relation 444. Up to 84 conditions per place. [2021-03-11 06:14:45,541 INFO L132 encePairwiseOnDemand]: 72/77 looper letters, 3 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2021-03-11 06:14:45,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 185 flow [2021-03-11 06:14:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 06:14:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 06:14:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2021-03-11 06:14:45,546 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9567099567099567 [2021-03-11 06:14:45,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:14:45,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 06:14:45,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,557 INFO L185 Difference]: Start difference. First operand has 61 places, 63 transitions, 167 flow. Second operand 3 states and 221 transitions. [2021-03-11 06:14:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 185 flow [2021-03-11 06:14:45,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 06:14:45,559 INFO L241 Difference]: Finished difference. Result has 64 places, 65 transitions, 188 flow [2021-03-11 06:14:45,559 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2021-03-11 06:14:45,560 INFO L335 CegarLoopForPetriNet]: 70 programPoint places, -6 predicate places. [2021-03-11 06:14:45,560 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 188 flow [2021-03-11 06:14:45,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,560 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:14:45,560 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:14:45,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 06:14:45,560 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:14:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:14:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1544159845, now seen corresponding path program 1 times [2021-03-11 06:14:45,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:14:45,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336756197] [2021-03-11 06:14:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:14:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:14:45,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-11 06:14:45,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:14:45,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336756197] [2021-03-11 06:14:45,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:14:45,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 06:14:45,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567114807] [2021-03-11 06:14:45,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 06:14:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:14:45,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 06:14:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 06:14:45,611 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 77 [2021-03-11 06:14:45,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:14:45,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 77 [2021-03-11 06:14:45,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:14:45,658 INFO L129 PetriNetUnfolder]: 150/498 cut-off events. [2021-03-11 06:14:45,658 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-03-11 06:14:45,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 498 events. 150/498 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2669 event pairs, 34 based on Foata normal form. 8/411 useless extension candidates. Maximal degree in co-relation 688. Up to 122 conditions per place. [2021-03-11 06:14:45,664 INFO L132 encePairwiseOnDemand]: 72/77 looper letters, 3 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2021-03-11 06:14:45,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 67 transitions, 206 flow [2021-03-11 06:14:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 06:14:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 06:14:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2021-03-11 06:14:45,666 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9567099567099567 [2021-03-11 06:14:45,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:14:45,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 06:14:45,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,668 INFO L185 Difference]: Start difference. First operand has 64 places, 65 transitions, 188 flow. Second operand 3 states and 221 transitions. [2021-03-11 06:14:45,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 67 transitions, 206 flow [2021-03-11 06:14:45,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 06:14:45,672 INFO L241 Difference]: Finished difference. Result has 66 places, 67 transitions, 206 flow [2021-03-11 06:14:45,672 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2021-03-11 06:14:45,672 INFO L335 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2021-03-11 06:14:45,673 INFO L480 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 206 flow [2021-03-11 06:14:45,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,673 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:14:45,674 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:14:45,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 06:14:45,674 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:14:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:14:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1501431393, now seen corresponding path program 1 times [2021-03-11 06:14:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:14:45,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954752430] [2021-03-11 06:14:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:14:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:14:45,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-11 06:14:45,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:14:45,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954752430] [2021-03-11 06:14:45,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:14:45,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 06:14:45,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073065898] [2021-03-11 06:14:45,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 06:14:45,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:14:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 06:14:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 06:14:45,718 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 77 [2021-03-11 06:14:45,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:14:45,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 77 [2021-03-11 06:14:45,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:14:45,758 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([203] thread4EXIT-->L119: Formula: (and (= v_thread4Thread1of1ForFork3_thidvar0_4 4) (= v_thread4Thread1of1ForFork3_thidvar3_4 4) (= v_thread4Thread1of1ForFork3_thidvar1_4 4) (= v_thread4Thread1of1ForFork3_thidvar2_4 4)) InVars {thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} OutVars{thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} AuxVars[] AssignedVars[][46], [Black: 93#true, 101#(not f1_2), Black: 99#true, 72#L119true, 107#(not f2_11), Black: 90#(and (= y_1 y_9) (= x_0 x_8))]) [2021-03-11 06:14:45,758 INFO L384 tUnfolder$Statistics]: this new event has 53 ancestors and is cut-off event [2021-03-11 06:14:45,758 INFO L387 tUnfolder$Statistics]: existing Event has 29 ancestors and is cut-off event [2021-03-11 06:14:45,758 INFO L387 tUnfolder$Statistics]: existing Event has 37 ancestors and is cut-off event [2021-03-11 06:14:45,758 INFO L387 tUnfolder$Statistics]: existing Event has 45 ancestors and is cut-off event [2021-03-11 06:14:45,773 INFO L129 PetriNetUnfolder]: 204/660 cut-off events. [2021-03-11 06:14:45,773 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-03-11 06:14:45,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 660 events. 204/660 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4009 event pairs, 54 based on Foata normal form. 38/566 useless extension candidates. Maximal degree in co-relation 993. Up to 183 conditions per place. [2021-03-11 06:14:45,780 INFO L132 encePairwiseOnDemand]: 72/77 looper letters, 3 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2021-03-11 06:14:45,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 224 flow [2021-03-11 06:14:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 06:14:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 06:14:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2021-03-11 06:14:45,781 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9567099567099567 [2021-03-11 06:14:45,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:14:45,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 06:14:45,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,783 INFO L185 Difference]: Start difference. First operand has 66 places, 67 transitions, 206 flow. Second operand 3 states and 221 transitions. [2021-03-11 06:14:45,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 224 flow [2021-03-11 06:14:45,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 06:14:45,786 INFO L241 Difference]: Finished difference. Result has 68 places, 69 transitions, 224 flow [2021-03-11 06:14:45,787 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2021-03-11 06:14:45,787 INFO L335 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2021-03-11 06:14:45,787 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 224 flow [2021-03-11 06:14:45,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,788 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:14:45,790 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:14:45,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 06:14:45,790 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:14:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:14:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash 672450543, now seen corresponding path program 1 times [2021-03-11 06:14:45,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:14:45,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38282193] [2021-03-11 06:14:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:14:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:14:45,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-11 06:14:45,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:14:45,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:14:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:14:45,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38282193] [2021-03-11 06:14:45,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:14:45,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 06:14:45,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192892238] [2021-03-11 06:14:45,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 06:14:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:14:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 06:14:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 06:14:45,834 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 77 [2021-03-11 06:14:45,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:14:45,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 77 [2021-03-11 06:14:45,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:14:45,905 INFO L129 PetriNetUnfolder]: 295/963 cut-off events. [2021-03-11 06:14:45,905 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2021-03-11 06:14:45,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 963 events. 295/963 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6868 event pairs, 96 based on Foata normal form. 32/782 useless extension candidates. Maximal degree in co-relation 1624. Up to 242 conditions per place. [2021-03-11 06:14:45,913 INFO L132 encePairwiseOnDemand]: 72/77 looper letters, 3 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2021-03-11 06:14:45,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 242 flow [2021-03-11 06:14:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 06:14:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 06:14:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2021-03-11 06:14:45,914 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9567099567099567 [2021-03-11 06:14:45,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:14:45,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2021-03-11 06:14:45,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 06:14:45,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 06:14:45,916 INFO L185 Difference]: Start difference. First operand has 68 places, 69 transitions, 224 flow. Second operand 3 states and 221 transitions. [2021-03-11 06:14:45,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 242 flow [2021-03-11 06:14:45,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 06:14:45,919 INFO L241 Difference]: Finished difference. Result has 70 places, 71 transitions, 242 flow [2021-03-11 06:14:45,919 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2021-03-11 06:14:45,919 INFO L335 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2021-03-11 06:14:45,919 INFO L480 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 242 flow [2021-03-11 06:14:45,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 06:14:45,920 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:14:45,920 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 06:14:45,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 06:14:45,920 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:14:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:14:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 797740932, now seen corresponding path program 1 times [2021-03-11 06:14:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:14:45,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239909482] [2021-03-11 06:14:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:14:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 06:14:45,937 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 06:14:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 06:14:45,954 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 06:14:45,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 06:14:45,977 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 06:14:45,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 06:14:46,014 INFO L202 PluginConnector]: Adding new model barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:14:46 BasicIcfg [2021-03-11 06:14:46,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 06:14:46,032 INFO L168 Benchmark]: Toolchain (without parser) took 1722.05 ms. Allocated memory is still 392.2 MB. Free memory was 372.0 MB in the beginning and 375.7 MB in the end (delta: -3.7 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:14:46,032 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 392.2 MB. Free memory was 373.3 MB in the beginning and 373.3 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:14:46,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.05 ms. Allocated memory is still 392.2 MB. Free memory was 371.6 MB in the beginning and 370.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:14:46,032 INFO L168 Benchmark]: Boogie Preprocessor took 28.09 ms. Allocated memory is still 392.2 MB. Free memory was 370.1 MB in the beginning and 369.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:14:46,033 INFO L168 Benchmark]: RCFGBuilder took 265.25 ms. Allocated memory is still 392.2 MB. Free memory was 368.9 MB in the beginning and 353.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-03-11 06:14:46,033 INFO L168 Benchmark]: TraceAbstraction took 1381.45 ms. Allocated memory is still 392.2 MB. Free memory was 353.2 MB in the beginning and 375.7 MB in the end (delta: -22.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-11 06:14:46,034 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 0.14 ms. Allocated memory is still 392.2 MB. Free memory was 373.3 MB in the beginning and 373.3 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.05 ms. Allocated memory is still 392.2 MB. Free memory was 371.6 MB in the beginning and 370.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.09 ms. Allocated memory is still 392.2 MB. Free memory was 370.1 MB in the beginning and 369.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 265.25 ms. Allocated memory is still 392.2 MB. Free memory was 368.9 MB in the beginning and 353.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1381.45 ms. Allocated memory is still 392.2 MB. Free memory was 353.2 MB in the beginning and 375.7 MB in the end (delta: -22.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 121]: assertion can be violated assertion can be violated We found a FailurePath: [L115] 0 assume x_0 == x_8 && y_1 == y_9; VAL [x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L116] FORK 0 fork 1 thread1(); VAL [x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L60] 1 f1_2 := false; [L61] 1 f2_3 := false; VAL [f1_2=false, f2_3=false, x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L63] FORK 1 fork 2, 2 thread2(); VAL [f1_2=false, f2_3=false, x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L30] 2 temp_4 := x_0; VAL [f1_2=false, f2_3=false, temp_4=-1, x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L31] 2 x_0 := temp_4 + 1; VAL [f1_2=false, f2_3=false, temp_4=-1, x_0=0, x_8=-1, y_1=-1, y_9=-1] [L64] FORK 1 fork 3, 3, 3 thread3(); VAL [f1_2=false, f2_3=false, temp_4=-1, x_0=0, x_8=-1, y_1=-1, y_9=-1] [L45] 3 temp_6 := y_1; VAL [f1_2=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=-1, y_9=-1] [L46] 3 y_1 := temp_6 + 1; VAL [f1_2=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L117] FORK 0 fork 4, 4, 4, 4 thread4(); VAL [f1_2=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L103] 4 f1_10 := false; [L104] 4 f2_11 := false; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L106] FORK 4 fork 5, 5, 5, 5, 5 thread5(); VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L107] FORK 4 fork 6, 6, 6, 6, 6, 6 thread6(); VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L108] JOIN 5 join 5, 5, 5, 5, 5; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L109] JOIN 6 join 6, 6, 6, 6, 6, 6; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L47] 3 f2_3 := true; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L32] 2 f1_2 := true; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L48] 3 assume f1_2; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L49] 3 temp_7 := x_0; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, temp_7=0, x_0=0, x_8=-1, y_1=0, y_9=-1] [L50] 3 x_0 := temp_7 + 1; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L33] 2 assume f2_3; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L51] 3 f2_3 := false; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L34] 2 temp_5 := y_1; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L35] 2 y_1 := temp_5 + 1; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L36] 2 f1_2 := false; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L52] 3 assume !f1_2; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L37] 2 assume !f2_3; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L65] JOIN 2 join 2, 2; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L66] JOIN 3 join 3, 3, 3; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L118] JOIN 1 join 1; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L119] JOIN 4 join 4, 4, 4, 4; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L120] 0 assume !(x_0 == x_8 && y_1 == y_9); VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L121] 0 assert false; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1194.4ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 747.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 4 SDslu, 0 SDs, 0 SdLazy, 33 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=242occurred in iteration=5, InterpolantAutomatonStates: 15, 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: 17.0ms SsaConstructionTime, 95.0ms SatisfiabilityAnalysisTime, 139.8ms InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 303 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 4/4 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 proved your program to be incorrect! Received shutdown request...