/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:57:26,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:57:26,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:57:26,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:57:26,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:57:26,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:57:26,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:57:26,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:57:26,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:57:26,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:57:26,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:57:26,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:57:26,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:57:26,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:57:26,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:57:26,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:57:26,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:57:26,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:57:26,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:57:26,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:57:26,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:57:26,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:57:26,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:57:26,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:57:26,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:57:26,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 13:57:26,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 13:57:26,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 13:57:26,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 13:57:26,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 13:57:26,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 13:57:26,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 13:57:26,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 13:57:26,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:57:26,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:57:26,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:57:26,689 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-VariableLbe.epf [2021-03-24 13:57:26,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:57:26,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:57:26,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:57:26,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:57:26,727 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:57:26,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:57:26,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:57:26,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:57:26,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:57:26,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:57:26,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:57:26,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:57:26,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:57:26,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:57:26,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:57:26,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:57:26,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:57:26,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:57:26,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:57:26,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:57:26,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:57:26,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:57:26,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:57:26,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:57:26,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:57:26,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:57:26,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:57:26,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:57:26,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:57:26,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:57:27,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:57:27,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:57:27,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:57:27,040 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:57:27,041 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:57:27,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl [2021-03-24 13:57:27,042 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl' [2021-03-24 13:57:27,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:57:27,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:57:27,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:57:27,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:57:27,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:57:27,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:57:27,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:57:27,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:57:27,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:57:27,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/1) ... [2021-03-24 13:57:27,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:57:27,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:57:27,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:57:27,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:57:27,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (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 [2021-03-24 13:57:27,182 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 13:57:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 13:57:27,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 13:57:27,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 13:57:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 13:57:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 13:57:27,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:57:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:57:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:57:27,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 13:57:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 13:57:27,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 13:57:27,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-24 13:57:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-24 13:57:27,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-24 13:57:27,185 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:57:27,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:57:27,338 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-24 13:57:27,339 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:57:27 BoogieIcfgContainer [2021-03-24 13:57:27,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:57:27,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:57:27,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:57:27,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:57:27,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:57:27" (1/2) ... [2021-03-24 13:57:27,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29529221 and model type spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:57:27, skipping insertion in model container [2021-03-24 13:57:27,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:57:27" (2/2) ... [2021-03-24 13:57:27,357 INFO L111 eAbstractionObserver]: Analyzing ICFG spaghetti.wvr.bpl [2021-03-24 13:57:27,362 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:57:27,365 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:57:27,366 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:57:27,408 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-24 13:57:27,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 13:57:27,438 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:57:27,438 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:57:27,438 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:57:27,438 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:57:27,438 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:57:27,439 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:57:27,439 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:57:27,439 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:57:27,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 34 transitions, 100 flow [2021-03-24 13:57:27,467 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-03-24 13:57:27,467 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:57:27,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 30 events. 4/30 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2021-03-24 13:57:27,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 34 transitions, 100 flow [2021-03-24 13:57:27,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 28 transitions, 80 flow [2021-03-24 13:57:27,475 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:57:27,482 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 28 transitions, 80 flow [2021-03-24 13:57:27,489 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 28 transitions, 80 flow [2021-03-24 13:57:27,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 28 transitions, 80 flow [2021-03-24 13:57:27,502 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-03-24 13:57:27,503 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:57:27,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 28 events. 4/28 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2021-03-24 13:57:27,526 INFO L142 LiptonReduction]: Number of co-enabled transitions 350 [2021-03-24 13:57:27,631 INFO L154 LiptonReduction]: Checked pairs total: 372 [2021-03-24 13:57:27,632 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-24 13:57:27,633 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 159 [2021-03-24 13:57:27,643 INFO L129 PetriNetUnfolder]: 4/22 cut-off events. [2021-03-24 13:57:27,643 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:57:27,644 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:27,644 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:27,644 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1994548771, now seen corresponding path program 1 times [2021-03-24 13:57:27,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:27,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271580044] [2021-03-24 13:57:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:27,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:27,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:27,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:27,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:27,782 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:57:27,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271580044] [2021-03-24 13:57:27,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:27,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:57:27,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987773210] [2021-03-24 13:57:27,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:57:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:27,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:57:27,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:57:27,815 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2021-03-24 13:57:27,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:27,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:27,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2021-03-24 13:57:27,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:27,958 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][21], [19#thread1EXITtrue, 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 31#thread4EXITtrue]) [2021-03-24 13:57:27,958 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,958 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,958 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,958 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:27,959 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][22], [49#(and (<= x_0 0) (<= 0 x_0)), 19#thread1EXITtrue, thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 11#L49true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse]) [2021-03-24 13:57:27,959 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,959 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,959 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,959 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:27,969 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][23], [thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 15#L17true, 31#thread4EXITtrue, 47#true]) [2021-03-24 13:57:27,969 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,969 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:27,969 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,970 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,970 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][24], [thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 11#L49true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 15#L17true, 47#true]) [2021-03-24 13:57:27,970 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,970 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:27,970 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,970 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:27,995 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][23], [34#L18true, thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 31#thread4EXITtrue, 47#true]) [2021-03-24 13:57:27,996 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-24 13:57:27,996 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,996 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-24 13:57:27,996 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,996 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][24], [34#L18true, thread4Thread1of1ForFork2InUse, thread2Thread1of1ForFork0InUse, 10#L60true, 11#L49true, 28#L26true, thread3Thread1of1ForFork1InUse, 29#L36true, thread1Thread1of1ForFork3InUse, 47#true]) [2021-03-24 13:57:27,996 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-24 13:57:27,996 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:27,997 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-24 13:57:27,997 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,043 INFO L129 PetriNetUnfolder]: 887/1206 cut-off events. [2021-03-24 13:57:28,043 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-03-24 13:57:28,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 1206 events. 887/1206 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 4741 event pairs, 239 based on Foata normal form. 1/812 useless extension candidates. Maximal degree in co-relation 2398. Up to 664 conditions per place. [2021-03-24 13:57:28,054 INFO L132 encePairwiseOnDemand]: 30/39 looper letters, 29 selfloop transitions, 10 changer transitions 4/51 dead transitions. [2021-03-24 13:57:28,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 212 flow [2021-03-24 13:57:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:57:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:57:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2021-03-24 13:57:28,063 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2021-03-24 13:57:28,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2021-03-24 13:57:28,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2021-03-24 13:57:28,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:28,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2021-03-24 13:57:28,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,074 INFO L185 Difference]: Start difference. First operand has 32 places, 23 transitions, 70 flow. Second operand 4 states and 116 transitions. [2021-03-24 13:57:28,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 212 flow [2021-03-24 13:57:28,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 51 transitions, 196 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-24 13:57:28,081 INFO L241 Difference]: Finished difference. Result has 30 places, 33 transitions, 132 flow [2021-03-24 13:57:28,082 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=30, PETRI_TRANSITIONS=33} [2021-03-24 13:57:28,083 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2021-03-24 13:57:28,083 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 33 transitions, 132 flow [2021-03-24 13:57:28,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,083 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:57:28,084 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:57:28,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:57:28,084 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:57:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:57:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash -740165853, now seen corresponding path program 2 times [2021-03-24 13:57:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:57:28,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124943576] [2021-03-24 13:57:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:57:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:57:28,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:28,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:57:28,111 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:57:28,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:57:28,124 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:57:28,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:57:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:57:28,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124943576] [2021-03-24 13:57:28,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:57:28,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:57:28,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065898247] [2021-03-24 13:57:28,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:57:28,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:57:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:57:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:57:28,144 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2021-03-24 13:57:28,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 33 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:57:28,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2021-03-24 13:57:28,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:57:28,274 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][18], [Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 58#true, 10#L60true, 11#L49true, 28#L26true, 29#L36true, 47#true, 15#L17true]) [2021-03-24 13:57:28,275 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,275 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,275 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:28,275 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,276 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][20], [Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 10#L60true, 28#L26true, 60#(and (<= 0 x_1) (<= x_1 0)), 29#L36true, 47#true, 15#L17true, 31#thread4EXITtrue]) [2021-03-24 13:57:28,277 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,277 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:28,277 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,277 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,283 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][18], [49#(and (<= x_0 0) (<= 0 x_0)), 19#thread1EXITtrue, Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), Black: 47#true, 10#L60true, 58#true, 11#L49true, 28#L26true, 29#L36true]) [2021-03-24 13:57:28,284 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][21], [19#thread1EXITtrue, 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 47#true, 10#L60true, 60#(and (<= 0 x_1) (<= x_1 0)), 28#L26true, 29#L36true, 31#thread4EXITtrue]) [2021-03-24 13:57:28,284 INFO L384 tUnfolder$Statistics]: this new event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L387 tUnfolder$Statistics]: existing Event has 8 ancestors and is cut-off event [2021-03-24 13:57:28,284 INFO L387 tUnfolder$Statistics]: existing Event has 6 ancestors and is cut-off event [2021-03-24 13:57:28,315 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([86] L47-->L49: Formula: (= v_x_1_8 (* v_x_1_9 10)) InVars {x_1=v_x_1_9} OutVars{x_1=v_x_1_8} AuxVars[] AssignedVars[x_1][18], [34#L18true, Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 10#L60true, 58#true, 11#L49true, 28#L26true, 29#L36true, 47#true]) [2021-03-24 13:57:28,315 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-24 13:57:28,315 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,316 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,316 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-24 13:57:28,316 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([102] L47-->thread4EXIT: Formula: (= v_x_1_13 0) InVars {} OutVars{x_1=v_x_1_13} AuxVars[] AssignedVars[x_1][20], [34#L18true, Black: 49#(and (<= x_0 0) (<= 0 x_0)), Black: 52#(and (<= x_0 x_1) (<= x_0 0) (<= 0 x_0) (< x_1 (+ x_0 1))), 10#L60true, 60#(and (<= 0 x_1) (<= x_1 0)), 28#L26true, 29#L36true, 31#thread4EXITtrue, 47#true]) [2021-03-24 13:57:28,316 INFO L384 tUnfolder$Statistics]: this new event has 10 ancestors and is cut-off event [2021-03-24 13:57:28,316 INFO L387 tUnfolder$Statistics]: existing Event has 7 ancestors and is cut-off event [2021-03-24 13:57:28,317 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,317 INFO L387 tUnfolder$Statistics]: existing Event has 9 ancestors and is cut-off event [2021-03-24 13:57:28,378 INFO L129 PetriNetUnfolder]: 994/1405 cut-off events. [2021-03-24 13:57:28,379 INFO L130 PetriNetUnfolder]: For 797/860 co-relation queries the response was YES. [2021-03-24 13:57:28,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1405 events. 994/1405 cut-off events. For 797/860 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6138 event pairs, 247 based on Foata normal form. 1/1380 useless extension candidates. Maximal degree in co-relation 3744. Up to 756 conditions per place. [2021-03-24 13:57:28,384 INFO L132 encePairwiseOnDemand]: 30/39 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2021-03-24 13:57:28,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 68 transitions, 388 flow [2021-03-24 13:57:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:57:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:57:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2021-03-24 13:57:28,388 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7371794871794872 [2021-03-24 13:57:28,388 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2021-03-24 13:57:28,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2021-03-24 13:57:28,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:57:28,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2021-03-24 13:57:28,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,392 INFO L185 Difference]: Start difference. First operand has 30 places, 33 transitions, 132 flow. Second operand 4 states and 115 transitions. [2021-03-24 13:57:28,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 68 transitions, 388 flow [2021-03-24 13:57:28,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 68 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 13:57:28,396 INFO L241 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2021-03-24 13:57:28,396 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2021-03-24 13:57:28,397 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2021-03-24 13:57:28,397 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2021-03-24 13:57:28,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:57:28,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:57:28,402 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:57:28 BasicIcfg [2021-03-24 13:57:28,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:57:28,403 INFO L168 Benchmark]: Toolchain (without parser) took 1320.80 ms. Allocated memory was 255.9 MB in the beginning and 335.5 MB in the end (delta: 79.7 MB). Free memory was 236.5 MB in the beginning and 310.6 MB in the end (delta: -74.1 MB). Peak memory consumption was 58.5 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:28,404 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 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. [2021-03-24 13:57:28,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.73 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:28,406 INFO L168 Benchmark]: Boogie Preprocessor took 13.45 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 894.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:57:28,406 INFO L168 Benchmark]: RCFGBuilder took 218.15 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 223.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:28,408 INFO L168 Benchmark]: TraceAbstraction took 1049.72 ms. Allocated memory was 255.9 MB in the beginning and 335.5 MB in the end (delta: 79.7 MB). Free memory was 242.1 MB in the beginning and 310.6 MB in the end (delta: -68.5 MB). Peak memory consumption was 62.0 MB. Max. memory is 16.0 GB. [2021-03-24 13:57:28,413 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 0.11 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 23.73 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.45 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 894.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 218.15 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 223.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1049.72 ms. Allocated memory was 255.9 MB in the beginning and 335.5 MB in the end (delta: 79.7 MB). Free memory was 242.1 MB in the beginning and 310.6 MB in the end (delta: -68.5 MB). Peak memory consumption was 62.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 142.5ms, 37 PlacesBefore, 32 PlacesAfterwards, 28 TransitionsBefore, 23 TransitionsAfterwards, 350 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 372 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 140, positive: 120, positive conditional: 0, positive unconditional: 120, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 97, positive: 87, positive conditional: 0, positive unconditional: 87, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 97, positive: 87, positive conditional: 0, positive unconditional: 87, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 140, positive: 33, positive conditional: 0, positive unconditional: 33, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 97, unknown conditional: 0, unknown unconditional: 97] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - PositiveResult [Line: 66]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 964.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 527.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 198.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 54 SDtfs, 13 SDslu, 14 SDs, 0 SdLazy, 100 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=1, InterpolantAutomatonStates: 8, 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: 5.1ms SsaConstructionTime, 18.1ms SatisfiabilityAnalysisTime, 118.0ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 116 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...