/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 16:16:33,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 16:16:33,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 16:16:33,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 16:16:33,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 16:16:33,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 16:16:33,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 16:16:33,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 16:16:33,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 16:16:33,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 16:16:33,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 16:16:33,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 16:16:33,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 16:16:33,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 16:16:33,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 16:16:33,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 16:16:33,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 16:16:33,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 16:16:33,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 16:16:33,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 16:16:33,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 16:16:33,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 16:16:33,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 16:16:33,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 16:16:33,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 16:16:33,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 16:16:33,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 16:16:33,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 16:16:33,884 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 [2021-06-10 16:16:33,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 16:16:33,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 16:16:33,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 16:16:33,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 16:16:33,903 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 16:16:33,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 16:16:33,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 16:16:33,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 16:16:33,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 16:16:33,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 16:16:33,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 16:16:33,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 16:16:33,905 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 16:16:33,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 16:16:34,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 16:16:34,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 16:16:34,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 16:16:34,132 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 16:16:34,133 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 16:16:34,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-1.wvr.bpl [2021-06-10 16:16:34,134 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-1.wvr.bpl' [2021-06-10 16:16:34,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 16:16:34,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 16:16:34,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 16:16:34,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 16:16:34,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 16:16:34,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 16:16:34,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 16:16:34,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 16:16:34,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 16:16:34,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/1) ... [2021-06-10 16:16:34,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 16:16:34,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 16:16:34,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 16:16:34,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 16:16:34,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (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 [2021-06-10 16:16:34,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 16:16:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 16:16:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 16:16:34,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 16:16:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 16:16:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 16:16:34,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 16:16:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 16:16:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 16:16:34,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-10 16:16:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-10 16:16:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-10 16:16:34,340 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 16:16:34,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 16:16:34,448 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 16:16:34,449 INFO L202 PluginConnector]: Adding new model min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 04:16:34 BoogieIcfgContainer [2021-06-10 16:16:34,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 16:16:34,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 16:16:34,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 16:16:34,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 16:16:34,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 04:16:34" (1/2) ... [2021-06-10 16:16:34,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e050e and model type min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 04:16:34, skipping insertion in model container [2021-06-10 16:16:34,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 04:16:34" (2/2) ... [2021-06-10 16:16:34,453 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-1.wvr.bpl [2021-06-10 16:16:34,461 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 16:16:34,463 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 16:16:34,464 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 16:16:34,493 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-10 16:16:34,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 16:16:34,517 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 16:16:34,518 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 16:16:34,518 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 16:16:34,518 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 16:16:34,518 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 16:16:34,518 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 16:16:34,518 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 16:16:34,518 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 16:16:34,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 30 transitions, 84 flow [2021-06-10 16:16:34,578 INFO L129 PetriNetUnfolder]: 2/27 cut-off events. [2021-06-10 16:16:34,578 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 16:16:34,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 2/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-06-10 16:16:34,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 30 transitions, 84 flow [2021-06-10 16:16:34,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 25 transitions, 68 flow [2021-06-10 16:16:34,604 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-10 16:16:34,604 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 16:16:34,605 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:34,605 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:34,605 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:34,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1570218033, now seen corresponding path program 1 times [2021-06-10 16:16:34,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:34,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172581003] [2021-06-10 16:16:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:34,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:34,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:34,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:34,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:34,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:34,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:34,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172581003] [2021-06-10 16:16:34,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:34,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 16:16:34,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313070393] [2021-06-10 16:16:34,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 16:16:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 16:16:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 16:16:34,809 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 30 [2021-06-10 16:16:34,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2021-06-10 16:16:34,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:34,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 30 [2021-06-10 16:16:34,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:34,900 INFO L129 PetriNetUnfolder]: 27/108 cut-off events. [2021-06-10 16:16:34,900 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-10 16:16:34,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 108 events. 27/108 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 481 event pairs, 12 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 148. Up to 32 conditions per place. [2021-06-10 16:16:34,905 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 6 selfloop transitions, 3 changer transitions 7/34 dead transitions. [2021-06-10 16:16:34,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 118 flow [2021-06-10 16:16:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 16:16:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 16:16:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2021-06-10 16:16:34,914 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8466666666666667 [2021-06-10 16:16:34,914 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 127 transitions. [2021-06-10 16:16:34,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 127 transitions. [2021-06-10 16:16:34,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:34,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 127 transitions. [2021-06-10 16:16:34,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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) [2021-06-10 16:16:34,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-06-10 16:16:34,927 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-06-10 16:16:34,928 INFO L185 Difference]: Start difference. First operand has 33 places, 25 transitions, 68 flow. Second operand 5 states and 127 transitions. [2021-06-10 16:16:34,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 118 flow [2021-06-10 16:16:34,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 16:16:34,934 INFO L241 Difference]: Finished difference. Result has 34 places, 27 transitions, 81 flow [2021-06-10 16:16:34,935 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2021-06-10 16:16:34,935 INFO L343 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2021-06-10 16:16:34,935 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 81 flow [2021-06-10 16:16:34,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2021-06-10 16:16:34,936 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:34,936 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:34,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 16:16:34,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1847916507, now seen corresponding path program 2 times [2021-06-10 16:16:34,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:34,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833020931] [2021-06-10 16:16:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:34,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:34,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 16:16:34,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:34,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 16:16:34,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:34,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:35,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:35,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:35,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833020931] [2021-06-10 16:16:35,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:35,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 16:16:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081567041] [2021-06-10 16:16:35,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 16:16:35,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 16:16:35,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 16:16:35,010 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 30 [2021-06-10 16:16:35,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 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) [2021-06-10 16:16:35,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:35,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 30 [2021-06-10 16:16:35,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:35,105 INFO L129 PetriNetUnfolder]: 34/142 cut-off events. [2021-06-10 16:16:35,105 INFO L130 PetriNetUnfolder]: For 35/41 co-relation queries the response was YES. [2021-06-10 16:16:35,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 142 events. 34/142 cut-off events. For 35/41 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 647 event pairs, 0 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 227. Up to 21 conditions per place. [2021-06-10 16:16:35,106 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 13 selfloop transitions, 4 changer transitions 11/46 dead transitions. [2021-06-10 16:16:35,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 205 flow [2021-06-10 16:16:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-10 16:16:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-10 16:16:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2021-06-10 16:16:35,111 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8714285714285714 [2021-06-10 16:16:35,111 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 183 transitions. [2021-06-10 16:16:35,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 183 transitions. [2021-06-10 16:16:35,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:35,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 183 transitions. [2021-06-10 16:16:35,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 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) [2021-06-10 16:16:35,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 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) [2021-06-10 16:16:35,113 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 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) [2021-06-10 16:16:35,113 INFO L185 Difference]: Start difference. First operand has 34 places, 27 transitions, 81 flow. Second operand 7 states and 183 transitions. [2021-06-10 16:16:35,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 205 flow [2021-06-10 16:16:35,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 182 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-06-10 16:16:35,116 INFO L241 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2021-06-10 16:16:35,117 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2021-06-10 16:16:35,117 INFO L343 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2021-06-10 16:16:35,117 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2021-06-10 16:16:35,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 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) [2021-06-10 16:16:35,117 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:35,118 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:35,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 16:16:35,118 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2008509727, now seen corresponding path program 1 times [2021-06-10 16:16:35,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:35,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267932894] [2021-06-10 16:16:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:35,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:35,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:16:35,141 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-06-10 16:16:35,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:35,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:35,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:35,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267932894] [2021-06-10 16:16:35,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:35,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-10 16:16:35,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93876679] [2021-06-10 16:16:35,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 16:16:35,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 16:16:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 16:16:35,144 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 30 [2021-06-10 16:16:35,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-06-10 16:16:35,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:35,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 30 [2021-06-10 16:16:35,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:35,151 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2021-06-10 16:16:35,151 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-10 16:16:35,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 42 events. 4/42 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 108 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 62. Up to 8 conditions per place. [2021-06-10 16:16:35,151 INFO L132 encePairwiseOnDemand]: 28/30 looper letters, 1 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2021-06-10 16:16:35,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 88 flow [2021-06-10 16:16:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 16:16:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 16:16:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-10 16:16:35,152 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-06-10 16:16:35,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-10 16:16:35,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-10 16:16:35,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:35,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-10 16:16:35,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-06-10 16:16:35,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-06-10 16:16:35,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-06-10 16:16:35,154 INFO L185 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 3 states and 75 transitions. [2021-06-10 16:16:35,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 88 flow [2021-06-10 16:16:35,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 82 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-06-10 16:16:35,155 INFO L241 Difference]: Finished difference. Result has 32 places, 25 transitions, 80 flow [2021-06-10 16:16:35,155 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2021-06-10 16:16:35,156 INFO L343 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2021-06-10 16:16:35,156 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 80 flow [2021-06-10 16:16:35,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-06-10 16:16:35,156 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 16:16:35,156 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 16:16:35,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 16:16:35,156 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 16:16:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 16:16:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 403633172, now seen corresponding path program 1 times [2021-06-10 16:16:35,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 16:16:35,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768574047] [2021-06-10 16:16:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 16:16:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 16:16:35,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:35,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 16:16:35,171 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-06-10 16:16:35,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:35,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 16:16:35,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 16:16:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 16:16:35,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768574047] [2021-06-10 16:16:35,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 16:16:35,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-10 16:16:35,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691997979] [2021-06-10 16:16:35,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 16:16:35,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 16:16:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 16:16:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 16:16:35,175 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 30 [2021-06-10 16:16:35,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-06-10 16:16:35,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 16:16:35,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 30 [2021-06-10 16:16:35,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 16:16:35,178 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-06-10 16:16:35,178 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 16:16:35,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 19 events. 1/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 27. Up to 5 conditions per place. [2021-06-10 16:16:35,178 INFO L132 encePairwiseOnDemand]: 28/30 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-06-10 16:16:35,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 56 flow [2021-06-10 16:16:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 16:16:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 16:16:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-10 16:16:35,179 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-06-10 16:16:35,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-10 16:16:35,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-10 16:16:35,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 16:16:35,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-10 16:16:35,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-06-10 16:16:35,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-06-10 16:16:35,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-06-10 16:16:35,180 INFO L185 Difference]: Start difference. First operand has 32 places, 25 transitions, 80 flow. Second operand 3 states and 75 transitions. [2021-06-10 16:16:35,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 56 flow [2021-06-10 16:16:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 16 transitions, 53 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-06-10 16:16:35,181 INFO L241 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2021-06-10 16:16:35,181 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2021-06-10 16:16:35,181 INFO L343 CegarLoopForPetriNet]: 33 programPoint places, -9 predicate places. [2021-06-10 16:16:35,182 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2021-06-10 16:16:35,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-06-10 16:16:35,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 16:16:35,185 INFO L202 PluginConnector]: Adding new model min-max-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 04:16:35 BasicIcfg [2021-06-10 16:16:35,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 16:16:35,186 INFO L168 Benchmark]: Toolchain (without parser) took 932.31 ms. Allocated memory is still 352.3 MB. Free memory was 332.4 MB in the beginning and 280.2 MB in the end (delta: 52.2 MB). Peak memory consumption was 54.8 MB. Max. memory is 16.0 GB. [2021-06-10 16:16:35,186 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.64 ms. Allocated memory is still 352.3 MB. Free memory is still 333.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 16:16:35,187 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.20 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 330.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 16:16:35,187 INFO L168 Benchmark]: Boogie Preprocessor took 11.91 ms. Allocated memory is still 352.3 MB. Free memory was 330.8 MB in the beginning and 329.9 MB in the end (delta: 904.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 16:16:35,188 INFO L168 Benchmark]: RCFGBuilder took 161.47 ms. Allocated memory is still 352.3 MB. Free memory was 329.8 MB in the beginning and 318.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 16:16:35,188 INFO L168 Benchmark]: TraceAbstraction took 735.65 ms. Allocated memory is still 352.3 MB. Free memory was 318.1 MB in the beginning and 280.2 MB in the end (delta: 37.9 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.0 GB. [2021-06-10 16:16:35,190 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 0.64 ms. Allocated memory is still 352.3 MB. Free memory is still 333.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.20 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 330.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.91 ms. Allocated memory is still 352.3 MB. Free memory was 330.8 MB in the beginning and 329.9 MB in the end (delta: 904.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 161.47 ms. Allocated memory is still 352.3 MB. Free memory was 329.8 MB in the beginning and 318.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 735.65 ms. Allocated memory is still 352.3 MB. Free memory was 318.1 MB in the beginning and 280.2 MB in the end (delta: 37.9 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 58]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 21.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 667.6ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 262.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 13 SDslu, 8 SDs, 0 SdLazy, 48 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=2, InterpolantAutomatonStates: 18, 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: 16.5ms SsaConstructionTime, 40.2ms SatisfiabilityAnalysisTime, 160.1ms InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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...