/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/regression/fork_multiple_parameter.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:36:24,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:36:24,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:36:24,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 04:36:24,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-03-11 04:36:24,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:36:24,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:36:24,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:36:24,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:36:24,113 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:36:24,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:36:24,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:36:24,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:36:24,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:36:24,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:36:24,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:36:24,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:36:24,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:36:24,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:36:24,117 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:36:24,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:36:24,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:36:24,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:36:24,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:36:24,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:36:24,399 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:36:24,399 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:36:24,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_multiple_parameter.bpl [2021-03-11 04:36:24,400 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_multiple_parameter.bpl' [2021-03-11 04:36:24,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:36:24,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:36:24,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:36:24,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:36:24,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:36:24,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:36:24,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:36:24,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:36:24,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:36:24,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... [2021-03-11 04:36:24,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:36:24,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:36:24,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:36:24,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:36:24,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:36:24,526 INFO L130 BoogieDeclarations]: Found specification of procedure add [2021-03-11 04:36:24,527 INFO L138 BoogieDeclarations]: Found implementation of procedure add [2021-03-11 04:36:24,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:36:24,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:36:24,529 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 04:36:24,636 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:36:24,636 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 04:36:24,637 INFO L202 PluginConnector]: Adding new model fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:36:24 BoogieIcfgContainer [2021-03-11 04:36:24,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:36:24,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:36:24,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:36:24,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:36:24,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:24" (1/2) ... [2021-03-11 04:36:24,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24211399 and model type fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:36:24, skipping insertion in model container [2021-03-11 04:36:24,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:36:24" (2/2) ... [2021-03-11 04:36:24,655 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_multiple_parameter.bpl [2021-03-11 04:36:24,662 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:36:24,664 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-11 04:36:24,664 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:36:24,687 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,687 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,687 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,688 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,688 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,689 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,690 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_sum not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,691 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,691 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,691 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_sum not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,696 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_sum not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:24,703 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-11 04:36:24,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 04:36:24,737 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:36:24,737 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:36:24,737 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:36:24,737 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:36:24,737 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:36:24,737 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:36:24,737 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:36:24,737 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:36:24,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 13 transitions, 34 flow [2021-03-11 04:36:24,753 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 04:36:24,753 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 04:36:24,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 12 events. 0/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 4 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 04:36:24,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 17 places, 13 transitions, 34 flow [2021-03-11 04:36:24,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 10 transitions, 26 flow [2021-03-11 04:36:24,758 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-03-11 04:36:24,758 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:36:24,758 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:24,759 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-11 04:36:24,759 INFO L428 AbstractCegarLoop]: === Iteration 1 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:36:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1444345, now seen corresponding path program 1 times [2021-03-11 04:36:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:24,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946841745] [2021-03-11 04:36:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:24,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:24,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:24,886 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-11 04:36:24,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:24,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946841745] [2021-03-11 04:36:24,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:24,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:36:24,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942193550] [2021-03-11 04:36:24,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:36:24,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:24,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:36:24,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:36:24,909 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 13 [2021-03-11 04:36:24,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 10 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:24,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:24,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 13 [2021-03-11 04:36:24,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:24,962 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-03-11 04:36:24,963 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 04:36:24,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 13 events. 2/13 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 15. Up to 6 conditions per place. [2021-03-11 04:36:24,964 INFO L132 encePairwiseOnDemand]: 9/13 looper letters, 5 selfloop transitions, 3 changer transitions 0/11 dead transitions. [2021-03-11 04:36:24,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 44 flow [2021-03-11 04:36:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 04:36:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 04:36:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2021-03-11 04:36:24,971 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2021-03-11 04:36:24,971 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 35 transitions. [2021-03-11 04:36:24,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 35 transitions. [2021-03-11 04:36:24,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:24,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 35 transitions. [2021-03-11 04:36:24,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:24,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:24,976 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:24,977 INFO L185 Difference]: Start difference. First operand has 14 places, 10 transitions, 26 flow. Second operand 5 states and 35 transitions. [2021-03-11 04:36:24,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 44 flow [2021-03-11 04:36:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 40 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 04:36:24,980 INFO L241 Difference]: Finished difference. Result has 15 places, 9 transitions, 26 flow [2021-03-11 04:36:24,981 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=26, PETRI_PLACES=15, PETRI_TRANSITIONS=9} [2021-03-11 04:36:24,982 INFO L335 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-03-11 04:36:24,982 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 9 transitions, 26 flow [2021-03-11 04:36:24,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:24,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:24,982 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:24,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:36:24,982 INFO L428 AbstractCegarLoop]: === Iteration 2 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:36:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1520910336, now seen corresponding path program 1 times [2021-03-11 04:36:24,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:24,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528445469] [2021-03-11 04:36:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:25,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:25,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 04:36:25,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,065 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 04:36:25,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:36:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:25,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528445469] [2021-03-11 04:36:25,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:25,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 04:36:25,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177634636] [2021-03-11 04:36:25,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:36:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:36:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:36:25,078 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 13 [2021-03-11 04:36:25,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 9 transitions, 26 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:25,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 13 [2021-03-11 04:36:25,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:25,223 INFO L129 PetriNetUnfolder]: 1/15 cut-off events. [2021-03-11 04:36:25,224 INFO L130 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2021-03-11 04:36:25,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 15 events. 1/15 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 2/17 useless extension candidates. Maximal degree in co-relation 3. Up to 3 conditions per place. [2021-03-11 04:36:25,225 INFO L132 encePairwiseOnDemand]: 6/13 looper letters, 4 selfloop transitions, 5 changer transitions 2/12 dead transitions. [2021-03-11 04:36:25,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 12 transitions, 59 flow [2021-03-11 04:36:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 04:36:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 04:36:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 39 transitions. [2021-03-11 04:36:25,228 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2021-03-11 04:36:25,228 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 39 transitions. [2021-03-11 04:36:25,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 39 transitions. [2021-03-11 04:36:25,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:25,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 39 transitions. [2021-03-11 04:36:25,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,236 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,236 INFO L185 Difference]: Start difference. First operand has 15 places, 9 transitions, 26 flow. Second operand 9 states and 39 transitions. [2021-03-11 04:36:25,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 12 transitions, 59 flow [2021-03-11 04:36:25,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 52 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 04:36:25,239 INFO L241 Difference]: Finished difference. Result has 22 places, 9 transitions, 37 flow [2021-03-11 04:36:25,239 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=37, PETRI_PLACES=22, PETRI_TRANSITIONS=9} [2021-03-11 04:36:25,240 INFO L335 CegarLoopForPetriNet]: 14 programPoint places, 8 predicate places. [2021-03-11 04:36:25,240 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 9 transitions, 37 flow [2021-03-11 04:36:25,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,240 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:25,240 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:25,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:36:25,240 INFO L428 AbstractCegarLoop]: === Iteration 3 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:36:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1807797666, now seen corresponding path program 2 times [2021-03-11 04:36:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175453583] [2021-03-11 04:36:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:25,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:25,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 04:36:25,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 04:36:25,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,322 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 04:36:25,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:36:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:25,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175453583] [2021-03-11 04:36:25,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:25,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 04:36:25,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182435917] [2021-03-11 04:36:25,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:36:25,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:25,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:36:25,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:36:25,341 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 13 [2021-03-11 04:36:25,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 9 transitions, 37 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:25,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 13 [2021-03-11 04:36:25,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:25,458 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 04:36:25,458 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-11 04:36:25,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 16 events. 0/16 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-11 04:36:25,459 INFO L132 encePairwiseOnDemand]: 6/13 looper letters, 4 selfloop transitions, 4 changer transitions 4/13 dead transitions. [2021-03-11 04:36:25,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 13 transitions, 81 flow [2021-03-11 04:36:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 04:36:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-03-11 04:36:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 40 transitions. [2021-03-11 04:36:25,461 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.3418803418803419 [2021-03-11 04:36:25,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 40 transitions. [2021-03-11 04:36:25,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 40 transitions. [2021-03-11 04:36:25,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:25,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 40 transitions. [2021-03-11 04:36:25,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,462 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,463 INFO L185 Difference]: Start difference. First operand has 22 places, 9 transitions, 37 flow. Second operand 9 states and 40 transitions. [2021-03-11 04:36:25,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 13 transitions, 81 flow [2021-03-11 04:36:25,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 13 transitions, 63 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-03-11 04:36:25,464 INFO L241 Difference]: Finished difference. Result has 25 places, 9 transitions, 42 flow [2021-03-11 04:36:25,464 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=42, PETRI_PLACES=25, PETRI_TRANSITIONS=9} [2021-03-11 04:36:25,465 INFO L335 CegarLoopForPetriNet]: 14 programPoint places, 11 predicate places. [2021-03-11 04:36:25,465 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 9 transitions, 42 flow [2021-03-11 04:36:25,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,465 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:25,465 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:25,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 04:36:25,465 INFO L428 AbstractCegarLoop]: === Iteration 4 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:36:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1530741366, now seen corresponding path program 3 times [2021-03-11 04:36:25,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:25,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412665289] [2021-03-11 04:36:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:25,497 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:25,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 04:36:25,521 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-11 04:36:25,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:25,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:25,540 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-11 04:36:25,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 04:36:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:25,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412665289] [2021-03-11 04:36:25,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:25,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 04:36:25,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591577817] [2021-03-11 04:36:25,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 04:36:25,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:25,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 04:36:25,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-11 04:36:25,556 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 13 [2021-03-11 04:36:25,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 9 transitions, 42 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:25,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 13 [2021-03-11 04:36:25,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:25,650 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 04:36:25,650 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-11 04:36:25,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 11 events. 0/11 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 04:36:25,650 INFO L132 encePairwiseOnDemand]: 6/13 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2021-03-11 04:36:25,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 10 transitions, 69 flow [2021-03-11 04:36:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 04:36:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-11 04:36:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 34 transitions. [2021-03-11 04:36:25,652 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2021-03-11 04:36:25,652 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 34 transitions. [2021-03-11 04:36:25,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 34 transitions. [2021-03-11 04:36:25,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:25,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 34 transitions. [2021-03-11 04:36:25,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,655 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,655 INFO L185 Difference]: Start difference. First operand has 25 places, 9 transitions, 42 flow. Second operand 8 states and 34 transitions. [2021-03-11 04:36:25,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 10 transitions, 69 flow [2021-03-11 04:36:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 10 transitions, 56 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-11 04:36:25,659 INFO L241 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2021-03-11 04:36:25,659 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2021-03-11 04:36:25,659 INFO L335 CegarLoopForPetriNet]: 14 programPoint places, 9 predicate places. [2021-03-11 04:36:25,662 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2021-03-11 04:36:25,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:25,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 04:36:25,665 INFO L202 PluginConnector]: Adding new model fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:36:25 BasicIcfg [2021-03-11 04:36:25,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:36:25,666 INFO L168 Benchmark]: Toolchain (without parser) took 1236.82 ms. Allocated memory was 255.9 MB in the beginning and 348.1 MB in the end (delta: 92.3 MB). Free memory was 236.9 MB in the beginning and 319.6 MB in the end (delta: -82.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:25,666 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:25,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:25,667 INFO L168 Benchmark]: Boogie Preprocessor took 10.84 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.2 MB in the end (delta: 750.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:36:25,667 INFO L168 Benchmark]: RCFGBuilder took 172.36 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 225.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:25,667 INFO L168 Benchmark]: TraceAbstraction took 1025.04 ms. Allocated memory was 255.9 MB in the beginning and 348.1 MB in the end (delta: 92.3 MB). Free memory was 225.4 MB in the beginning and 319.6 MB in the end (delta: -94.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:36:25,669 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.84 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.2 MB in the end (delta: 750.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 172.36 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 225.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1025.04 ms. Allocated memory was 255.9 MB in the beginning and 348.1 MB in the end (delta: 92.3 MB). Free memory was 225.4 MB in the beginning and 319.6 MB in the end (delta: -94.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 25]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 928.1ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 470.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 46 SDslu, 37 SDs, 0 SdLazy, 88 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 439.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, InterpolantAutomatonStates: 31, 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: 3.8ms SsaConstructionTime, 29.8ms SatisfiabilityAnalysisTime, 318.5ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 197 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...