/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/chl/container-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 05:46:58,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 05:46:58,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 05:46:58,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 05:46:58,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 05:46:58,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 05:46:58,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 05:46:58,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 05:46:58,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 05:46:58,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 05:46:58,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 05:46:58,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 05:46:58,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 05:46:58,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 05:46:58,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 05:46:58,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 05:46:58,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 05:46:58,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 05:46:58,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 05:46:58,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 05:46:58,143 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 05:46:58,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 05:46:58,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 05:46:58,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 05:46:58,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 05:46:58,168 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 05:46:58,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 05:46:58,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 05:46:58,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 05:46:58,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 05:46:58,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 05:46:58,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 05:46:58,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 05:46:58,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 05:46:58,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 05:46:58,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 05:46:58,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 05:46:58,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 05:46:58,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 05:46:58,171 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 05:46:58,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 05:46:58,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 05:46:58,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 05:46:58,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 05:46:58,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 05:46:58,407 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 05:46:58,407 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 05:46:58,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-symm.wvr.bpl [2021-03-11 05:46:58,408 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-symm.wvr.bpl' [2021-03-11 05:46:58,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 05:46:58,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 05:46:58,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 05:46:58,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 05:46:58,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 05:46:58,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 05:46:58,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 05:46:58,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 05:46:58,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 05:46:58,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/1) ... [2021-03-11 05:46:58,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 05:46:58,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 05:46:58,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 05:46:58,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 05:46:58,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (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 05:46:58,522 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 05:46:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 05:46:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 05:46:58,523 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 05:46:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 05:46:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 05:46:58,523 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 05:46:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 05:46:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 05:46:58,524 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 05:46:58,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 05:46:58,707 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 05:46:58,708 INFO L202 PluginConnector]: Adding new model container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:46:58 BoogieIcfgContainer [2021-03-11 05:46:58,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 05:46:58,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 05:46:58,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 05:46:58,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 05:46:58,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 05:46:58" (1/2) ... [2021-03-11 05:46:58,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c92ec33 and model type container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 05:46:58, skipping insertion in model container [2021-03-11 05:46:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 05:46:58" (2/2) ... [2021-03-11 05:46:58,713 INFO L111 eAbstractionObserver]: Analyzing ICFG container-symm.wvr.bpl [2021-03-11 05:46:58,716 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 05:46:58,719 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 05:46:58,719 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 05:46:58,737 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 05:46:58,748 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 05:46:58,767 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 05:46:58,767 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 05:46:58,767 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 05:46:58,767 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 05:46:58,767 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 05:46:58,767 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 05:46:58,767 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 05:46:58,767 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 05:46:58,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 44 flow [2021-03-11 05:46:58,802 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 05:46:58,802 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 05:46:58,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 12 events. 0/12 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 05:46:58,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 44 flow [2021-03-11 05:46:58,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 10 transitions, 32 flow [2021-03-11 05:46:58,812 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 05:46:58,812 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 05:46:58,812 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:58,812 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:58,813 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash 710309030, now seen corresponding path program 1 times [2021-03-11 05:46:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:58,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700151414] [2021-03-11 05:46:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:59,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:59,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:59,172 INFO L142 QuantifierPusher]: treesize reduction 4655, result has 17.9 percent of original size [2021-03-11 05:46:59,194 INFO L147 QuantifierPusher]: treesize reduction 184, result has 81.8 percent of original size 828 [2021-03-11 05:46:59,533 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 50 [2021-03-11 05:46:59,537 INFO L142 QuantifierPusher]: treesize reduction 247, result has 26.3 percent of original size [2021-03-11 05:46:59,538 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-03-11 05:46:59,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:59,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:59,582 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 05:46:59,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700151414] [2021-03-11 05:46:59,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:46:59,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 05:46:59,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471576985] [2021-03-11 05:46:59,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 05:46:59,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:46:59,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 05:46:59,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 05:46:59,597 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-03-11 05:46:59,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 10 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:46:59,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:46:59,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-03-11 05:46:59,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:46:59,666 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 05:46:59,666 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 05:46:59,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 16 events. 0/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 05:46:59,667 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 2 selfloop transitions, 1 changer transitions 1/11 dead transitions. [2021-03-11 05:46:59,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 42 flow [2021-03-11 05:46:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 05:46:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 05:46:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-11 05:46:59,674 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2021-03-11 05:46:59,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-11 05:46:59,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-11 05:46:59,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:46:59,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-11 05:46:59,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 05:46:59,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 05:46:59,679 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 05:46:59,681 INFO L185 Difference]: Start difference. First operand has 17 places, 10 transitions, 32 flow. Second operand 4 states and 45 transitions. [2021-03-11 05:46:59,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 42 flow [2021-03-11 05:46:59,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 34 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 05:46:59,684 INFO L241 Difference]: Finished difference. Result has 18 places, 10 transitions, 31 flow [2021-03-11 05:46:59,685 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=18, PETRI_TRANSITIONS=10} [2021-03-11 05:46:59,685 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-03-11 05:46:59,685 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 31 flow [2021-03-11 05:46:59,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:46:59,686 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 05:46:59,686 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 05:46:59,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 05:46:59,686 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 05:46:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 05:46:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1130461598, now seen corresponding path program 2 times [2021-03-11 05:46:59,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 05:46:59,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434486064] [2021-03-11 05:46:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 05:46:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 05:46:59,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:46:59,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:46:59,781 INFO L142 QuantifierPusher]: treesize reduction 4729, result has 16.6 percent of original size [2021-03-11 05:46:59,789 INFO L147 QuantifierPusher]: treesize reduction 134, result has 85.7 percent of original size 806 [2021-03-11 05:47:00,035 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 49 [2021-03-11 05:47:00,043 INFO L142 QuantifierPusher]: treesize reduction 174, result has 33.6 percent of original size [2021-03-11 05:47:00,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-03-11 05:47:00,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 05:47:00,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 05:47:00,089 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 05:47:00,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434486064] [2021-03-11 05:47:00,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 05:47:00,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 05:47:00,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421168707] [2021-03-11 05:47:00,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 05:47:00,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 05:47:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 05:47:00,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 05:47:00,101 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 14 [2021-03-11 05:47:00,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 10 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:47:00,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 05:47:00,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 14 [2021-03-11 05:47:00,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 05:47:00,163 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 05:47:00,164 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 05:47:00,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 11 events. 0/11 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 05:47:00,164 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2021-03-11 05:47:00,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 36 flow [2021-03-11 05:47:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 05:47:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 05:47:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-03-11 05:47:00,165 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-03-11 05:47:00,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-03-11 05:47:00,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-03-11 05:47:00,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 05:47:00,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-03-11 05:47:00,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 05:47:00,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 05:47:00,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 05:47:00,168 INFO L185 Difference]: Start difference. First operand has 18 places, 10 transitions, 31 flow. Second operand 4 states and 44 transitions. [2021-03-11 05:47:00,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 36 flow [2021-03-11 05:47:00,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 34 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 05:47:00,170 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-03-11 05:47:00,172 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-03-11 05:47:00,173 INFO L335 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2021-03-11 05:47:00,173 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2021-03-11 05:47:00,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 05:47:00,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 05:47:00,180 INFO L202 PluginConnector]: Adding new model container-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 05:47:00 BasicIcfg [2021-03-11 05:47:00,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 05:47:00,181 INFO L168 Benchmark]: Toolchain (without parser) took 1743.62 ms. Allocated memory is still 348.1 MB. Free memory was 329.1 MB in the beginning and 298.9 MB in the end (delta: 30.1 MB). Peak memory consumption was 33.2 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:00,182 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 348.1 MB. Free memory was 330.2 MB in the beginning and 330.1 MB in the end (delta: 75.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:47:00,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.77 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 327.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:00,183 INFO L168 Benchmark]: Boogie Preprocessor took 10.83 ms. Allocated memory is still 348.1 MB. Free memory was 327.1 MB in the beginning and 326.3 MB in the end (delta: 846.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 05:47:00,184 INFO L168 Benchmark]: RCFGBuilder took 239.43 ms. Allocated memory is still 348.1 MB. Free memory was 326.2 MB in the beginning and 312.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:00,184 INFO L168 Benchmark]: TraceAbstraction took 1470.56 ms. Allocated memory is still 348.1 MB. Free memory was 311.9 MB in the beginning and 298.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.0 GB. [2021-03-11 05:47:00,187 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 348.1 MB. Free memory was 330.2 MB in the beginning and 330.1 MB in the end (delta: 75.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.77 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 327.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.83 ms. Allocated memory is still 348.1 MB. Free memory was 327.1 MB in the beginning and 326.3 MB in the end (delta: 846.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 239.43 ms. Allocated memory is still 348.1 MB. Free memory was 326.2 MB in the beginning and 312.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1470.56 ms. Allocated memory is still 348.1 MB. Free memory was 311.9 MB in the beginning and 298.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1418.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 165.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 760.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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, 82.5ms SatisfiabilityAnalysisTime, 1026.2ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 684 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...