/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 23:57:47,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 23:57:47,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 23:57:47,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-10 23:57:47,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 23:57:47,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 23:57:47,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 23:57:47,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 23:57:47,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 23:57:47,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 23:57:47,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 23:57:47,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 23:57:47,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 23:57:47,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 23:57:47,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 23:57:47,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 23:57:47,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 23:57:47,619 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-SemanticLbe.epf [2021-06-10 23:57:47,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 23:57:47,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 23:57:47,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 23:57:47,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 23:57:47,639 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 23:57:47,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 23:57:47,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 23:57:47,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 23:57:47,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 23:57:47,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 23:57:47,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 23:57:47,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 23:57:47,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 23:57:47,641 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 23:57:47,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 23:57:47,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 23:57:47,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 23:57:47,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 23:57:47,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 23:57:47,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 23:57:47,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 23:57:47,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 23:57:47,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 23:57:47,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 23:57:47,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 23:57:47,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 23:57:47,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 23:57:47,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 23:57:47,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 23:57:47,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 23:57:47,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 23:57:47,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 23:57:47,942 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 23:57:47,943 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 23:57:47,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl [2021-06-10 23:57:47,944 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl' [2021-06-10 23:57:47,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 23:57:47,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 23:57:47,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 23:57:47,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 23:57:47,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 23:57:47,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:47,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:47,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 23:57:48,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 23:57:48,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 23:57:48,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 23:57:48,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/1) ... [2021-06-10 23:57:48,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 23:57:48,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 23:57:48,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 23:57:48,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 23:57:48,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (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 23:57:48,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-10 23:57:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-10 23:57:48,103 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-10 23:57:48,104 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-10 23:57:48,105 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-10 23:57:48,105 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-10 23:57:48,105 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 23:57:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 23:57:48,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 23:57:48,107 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 23:57:48,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 23:57:48,284 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-10 23:57:48,285 INFO L202 PluginConnector]: Adding new model Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:57:48 BoogieIcfgContainer [2021-06-10 23:57:48,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 23:57:48,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 23:57:48,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 23:57:48,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 23:57:48,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:47" (1/2) ... [2021-06-10 23:57:48,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534a18 and model type Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 11:57:48, skipping insertion in model container [2021-06-10 23:57:48,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:57:48" (2/2) ... [2021-06-10 23:57:48,291 INFO L111 eAbstractionObserver]: Analyzing ICFG Peterson.bpl [2021-06-10 23:57:48,296 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 23:57:48,299 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-06-10 23:57:48,300 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 23:57:48,323 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:48,323 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:48,327 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:48,327 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:48,329 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:57:48,345 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-10 23:57:48,364 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:57:48,364 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:57:48,364 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:57:48,364 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:57:48,364 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:57:48,364 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:57:48,365 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:57:48,365 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:57:48,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-06-10 23:57:48,390 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-10 23:57:48,391 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:48,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-06-10 23:57:48,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-06-10 23:57:48,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:48,399 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:57:48,418 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:48,421 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:48,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:48,429 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-10 23:57:48,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:48,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-06-10 23:57:48,433 INFO L151 LiptonReduction]: Number of co-enabled transitions 260 [2021-06-10 23:57:48,517 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:48,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:48,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:48,614 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:48,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:48,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:48,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:48,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:48,989 INFO L163 LiptonReduction]: Checked pairs total: 442 [2021-06-10 23:57:48,989 INFO L165 LiptonReduction]: Total number of compositions: 10 [2021-06-10 23:57:48,998 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 600 [2021-06-10 23:57:49,015 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-10 23:57:49,015 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:49,015 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:49,016 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 23:57:49,016 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2457921, now seen corresponding path program 1 times [2021-06-10 23:57:49,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988786870] [2021-06-10 23:57:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:49,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:49,147 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 23:57:49,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988786870] [2021-06-10 23:57:49,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:57:49,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 23:57:49,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571425318] [2021-06-10 23:57:49,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 23:57:49,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 23:57:49,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 23:57:49,170 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2021-06-10 23:57:49,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 23:57:49,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:49,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2021-06-10 23:57:49,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:57:49,218 INFO L129 PetriNetUnfolder]: 19/50 cut-off events. [2021-06-10 23:57:49,218 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:49,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 50 events. 19/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 106 event pairs, 1 based on Foata normal form. 12/59 useless extension candidates. Maximal degree in co-relation 89. Up to 26 conditions per place. [2021-06-10 23:57:49,222 INFO L132 encePairwiseOnDemand]: 25/36 looper letters, 8 selfloop transitions, 7 changer transitions 0/20 dead transitions. [2021-06-10 23:57:49,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 76 flow [2021-06-10 23:57:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 23:57:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 23:57:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2021-06-10 23:57:49,233 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-06-10 23:57:49,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2021-06-10 23:57:49,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2021-06-10 23:57:49,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:57:49,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2021-06-10 23:57:49,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 23:57:49,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 23:57:49,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 23:57:49,247 INFO L185 Difference]: Start difference. First operand has 21 places, 16 transitions, 38 flow. Second operand 3 states and 72 transitions. [2021-06-10 23:57:49,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 76 flow [2021-06-10 23:57:49,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 74 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 23:57:49,257 INFO L241 Difference]: Finished difference. Result has 21 places, 20 transitions, 88 flow [2021-06-10 23:57:49,259 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2021-06-10 23:57:49,259 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2021-06-10 23:57:49,260 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 88 flow [2021-06-10 23:57:49,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 23:57:49,260 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:49,260 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:57:49,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 23:57:49,261 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2093222379, now seen corresponding path program 1 times [2021-06-10 23:57:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:49,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760885215] [2021-06-10 23:57:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:49,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:49,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:49,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:49,318 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 23:57:49,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760885215] [2021-06-10 23:57:49,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:57:49,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 23:57:49,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908621122] [2021-06-10 23:57:49,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 23:57:49,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 23:57:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-10 23:57:49,326 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2021-06-10 23:57:49,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 23:57:49,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:49,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2021-06-10 23:57:49,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:57:49,366 INFO L129 PetriNetUnfolder]: 20/55 cut-off events. [2021-06-10 23:57:49,366 INFO L130 PetriNetUnfolder]: For 18/21 co-relation queries the response was YES. [2021-06-10 23:57:49,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 55 events. 20/55 cut-off events. For 18/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 151. Up to 28 conditions per place. [2021-06-10 23:57:49,369 INFO L132 encePairwiseOnDemand]: 31/36 looper letters, 9 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2021-06-10 23:57:49,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 138 flow [2021-06-10 23:57:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 23:57:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 23:57:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2021-06-10 23:57:49,375 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2021-06-10 23:57:49,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 89 transitions. [2021-06-10 23:57:49,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 89 transitions. [2021-06-10 23:57:49,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:57:49,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 89 transitions. [2021-06-10 23:57:49,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 23:57:49,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 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 23:57:49,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 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 23:57:49,385 INFO L185 Difference]: Start difference. First operand has 21 places, 20 transitions, 88 flow. Second operand 4 states and 89 transitions. [2021-06-10 23:57:49,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 138 flow [2021-06-10 23:57:49,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 23:57:49,388 INFO L241 Difference]: Finished difference. Result has 24 places, 23 transitions, 111 flow [2021-06-10 23:57:49,388 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2021-06-10 23:57:49,388 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2021-06-10 23:57:49,389 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 111 flow [2021-06-10 23:57:49,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 23:57:49,389 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:49,389 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:57:49,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 23:57:49,390 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:49,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2110891357, now seen corresponding path program 2 times [2021-06-10 23:57:49,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:49,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296706369] [2021-06-10 23:57:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:49,421 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:49,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:49,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:49,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:49,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:49,436 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 23:57:49,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296706369] [2021-06-10 23:57:49,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:57:49,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 23:57:49,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92738896] [2021-06-10 23:57:49,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 23:57:49,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 23:57:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-10 23:57:49,440 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2021-06-10 23:57:49,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 23:57:49,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:49,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2021-06-10 23:57:49,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:57:49,459 INFO L129 PetriNetUnfolder]: 8/25 cut-off events. [2021-06-10 23:57:49,460 INFO L130 PetriNetUnfolder]: For 26/30 co-relation queries the response was YES. [2021-06-10 23:57:49,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 25 events. 8/25 cut-off events. For 26/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs, 0 based on Foata normal form. 5/30 useless extension candidates. Maximal degree in co-relation 73. Up to 11 conditions per place. [2021-06-10 23:57:49,461 INFO L132 encePairwiseOnDemand]: 31/36 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2021-06-10 23:57:49,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 104 flow [2021-06-10 23:57:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 23:57:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 23:57:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2021-06-10 23:57:49,464 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2021-06-10 23:57:49,464 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2021-06-10 23:57:49,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2021-06-10 23:57:49,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:57:49,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2021-06-10 23:57:49,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 23:57:49,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 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 23:57:49,466 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 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 23:57:49,466 INFO L185 Difference]: Start difference. First operand has 24 places, 23 transitions, 111 flow. Second operand 4 states and 87 transitions. [2021-06-10 23:57:49,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 104 flow [2021-06-10 23:57:49,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 23:57:49,468 INFO L241 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2021-06-10 23:57:49,468 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2021-06-10 23:57:49,469 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2021-06-10 23:57:49,469 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2021-06-10 23:57:49,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 23:57:49,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 23:57:49,473 INFO L202 PluginConnector]: Adding new model Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 11:57:49 BasicIcfg [2021-06-10 23:57:49,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 23:57:49,474 INFO L168 Benchmark]: Toolchain (without parser) took 1496.30 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 241.1 MB in the end (delta: 80.3 MB). Peak memory consumption was 82.3 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:49,475 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 341.8 MB. Free memory is still 322.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 23:57:49,476 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.72 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:49,477 INFO L168 Benchmark]: Boogie Preprocessor took 14.45 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.9 MB in the end (delta: 934.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:49,481 INFO L168 Benchmark]: RCFGBuilder took 270.16 ms. Allocated memory is still 341.8 MB. Free memory was 318.8 MB in the beginning and 309.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:49,482 INFO L168 Benchmark]: TraceAbstraction took 1186.32 ms. Allocated memory is still 341.8 MB. Free memory was 308.6 MB in the beginning and 241.1 MB in the end (delta: 67.6 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:49,485 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 0.13 ms. Allocated memory is still 341.8 MB. Free memory is still 322.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.72 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.45 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.9 MB in the end (delta: 934.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 270.16 ms. Allocated memory is still 341.8 MB. Free memory was 318.8 MB in the beginning and 309.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1186.32 ms. Allocated memory is still 341.8 MB. Free memory was 308.6 MB in the beginning and 241.1 MB in the end (delta: 67.6 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 568.5ms, 29 PlacesBefore, 21 PlacesAfterwards, 24 TransitionsBefore, 16 TransitionsAfterwards, 260 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 442 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 278, positive: 242, positive conditional: 0, positive unconditional: 242, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 190, positive: 166, positive conditional: 0, positive unconditional: 166, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 190, positive: 166, positive conditional: 0, positive unconditional: 166, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 190, positive: 144, positive conditional: 0, positive unconditional: 144, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 46, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 181, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 278, positive: 76, positive conditional: 0, positive unconditional: 76, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 190, unknown conditional: 0, unknown unconditional: 190] , Statistics on independence cache: Total cache size (in pairs): 268, Positive cache size: 244, Positive conditional cache size: 0, Positive unconditional cache size: 244, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24 - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1109.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 188.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 643.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 11 SDslu, 2 SDs, 0 SdLazy, 25 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=2, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.1ms SsaConstructionTime, 21.9ms SatisfiabilityAnalysisTime, 116.6ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 45 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...