/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:38:55,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:38:55,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:38:55,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:38:55,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:38:55,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:38:55,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:38:55,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:38:55,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:38:55,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:38:55,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:38:55,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:38:55,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:38:55,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:38:55,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:38:55,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:38:55,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:38:55,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:38:55,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:38:55,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:38:55,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:38:55,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:38:55,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:38:55,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:38:55,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:38:55,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2021-03-24 13:38:55,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:38:55,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:38:55,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:38:55,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:38:55,843 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:38:55,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:38:55,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:38:55,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:38:55,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:38:55,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:38:55,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:38:55,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:38:55,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:38:55,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:38:55,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:38:55,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:38:55,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:38:55,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:38:55,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:38:55,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:38:55,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:38:55,846 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:38:55,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:38:55,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:38:56,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:38:56,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:38:56,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:38:56,141 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 13:38:56,142 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 13:38:56,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2021-03-24 13:38:56,143 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2021-03-24 13:38:56,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:38:56,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 13:38:56,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:38:56,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:38:56,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:38:56,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:38:56,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:38:56,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:38:56,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:38:56,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... [2021-03-24 13:38:56,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:38:56,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:38:56,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:38:56,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:38:56,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:38:56,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-24 13:38:56,271 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-24 13:38:56,272 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-24 13:38:56,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-24 13:38:56,273 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-24 13:38:56,273 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-24 13:38:56,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 13:38:56,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:38:56,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:38:56,274 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:38:56,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:38:56,393 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 13:38:56,395 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:38:56 BoogieIcfgContainer [2021-03-24 13:38:56,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:38:56,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:38:56,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:38:56,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:38:56,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 01:38:56" (1/2) ... [2021-03-24 13:38:56,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f726e7 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:38:56, skipping insertion in model container [2021-03-24 13:38:56,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:38:56" (2/2) ... [2021-03-24 13:38:56,404 INFO L111 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2021-03-24 13:38:56,426 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:38:56,433 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:38:56,434 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:38:56,480 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-24 13:38:56,496 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 13:38:56,526 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:38:56,526 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:38:56,526 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:38:56,526 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:38:56,526 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:38:56,526 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:38:56,527 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:38:56,527 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:38:56,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 52 flow [2021-03-24 13:38:56,549 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-24 13:38:56,549 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:38:56,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 4. Up to 3 conditions per place. [2021-03-24 13:38:56,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 52 flow [2021-03-24 13:38:56,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 11 transitions, 40 flow [2021-03-24 13:38:56,555 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:38:56,562 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 11 transitions, 40 flow [2021-03-24 13:38:56,564 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 11 transitions, 40 flow [2021-03-24 13:38:56,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions, 40 flow [2021-03-24 13:38:56,569 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-24 13:38:56,569 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:38:56,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 1/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 4. Up to 3 conditions per place. [2021-03-24 13:38:56,571 INFO L142 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-24 13:38:56,595 INFO L154 LiptonReduction]: Checked pairs total: 7 [2021-03-24 13:38:56,595 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 13:38:56,597 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 43 [2021-03-24 13:38:56,604 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-24 13:38:56,604 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:38:56,605 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:38:56,605 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:38:56,605 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:38:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:38:56,610 INFO L82 PathProgramCache]: Analyzing trace with hash 936852669, now seen corresponding path program 1 times [2021-03-24 13:38:56,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:38:56,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105809631] [2021-03-24 13:38:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:38:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:38:56,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:38:56,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:38:56,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:38:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:38:56,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105809631] [2021-03-24 13:38:56,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:38:56,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:38:56,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091284854] [2021-03-24 13:38:56,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:38:56,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:38:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:38:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:38:56,735 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 17 [2021-03-24 13:38:56,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:38:56,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 17 [2021-03-24 13:38:56,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:38:56,753 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-24 13:38:56,753 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-24 13:38:56,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 7 events. 0/7 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:38:56,754 INFO L132 encePairwiseOnDemand]: 15/17 looper letters, 1 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2021-03-24 13:38:56,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 30 flow [2021-03-24 13:38:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:38:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:38:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2021-03-24 13:38:56,767 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8823529411764706 [2021-03-24 13:38:56,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2021-03-24 13:38:56,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2021-03-24 13:38:56,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:38:56,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2021-03-24 13:38:56,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,784 INFO L185 Difference]: Start difference. First operand has 14 places, 9 transitions, 36 flow. Second operand 3 states and 45 transitions. [2021-03-24 13:38:56,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 30 flow [2021-03-24 13:38:56,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 22 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 13:38:56,787 INFO L241 Difference]: Finished difference. Result has 12 places, 7 transitions, 20 flow [2021-03-24 13:38:56,789 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2021-03-24 13:38:56,789 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2021-03-24 13:38:56,790 INFO L480 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 20 flow [2021-03-24 13:38:56,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,790 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:38:56,790 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:38:56,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:38:56,790 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:38:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:38:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 798179439, now seen corresponding path program 1 times [2021-03-24 13:38:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:38:56,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059261633] [2021-03-24 13:38:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:38:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:38:56,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:38:56,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:38:56,871 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:38:56,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:38:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:38:56,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059261633] [2021-03-24 13:38:56,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:38:56,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:38:56,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868646529] [2021-03-24 13:38:56,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:38:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:38:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:38:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:38:56,896 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2021-03-24 13:38:56,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 20 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:38:56,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2021-03-24 13:38:56,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:38:56,942 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 13:38:56,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:38:56,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 13:38:56,943 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 2 selfloop transitions, 1 changer transitions 1/8 dead transitions. [2021-03-24 13:38:56,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 30 flow [2021-03-24 13:38:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:38:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:38:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2021-03-24 13:38:56,947 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7205882352941176 [2021-03-24 13:38:56,947 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 49 transitions. [2021-03-24 13:38:56,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 49 transitions. [2021-03-24 13:38:56,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:38:56,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 49 transitions. [2021-03-24 13:38:56,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,949 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,949 INFO L185 Difference]: Start difference. First operand has 12 places, 7 transitions, 20 flow. Second operand 4 states and 49 transitions. [2021-03-24 13:38:56,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 30 flow [2021-03-24 13:38:56,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 8 transitions, 29 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:38:56,951 INFO L241 Difference]: Finished difference. Result has 16 places, 7 transitions, 26 flow [2021-03-24 13:38:56,951 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=26, PETRI_PLACES=16, PETRI_TRANSITIONS=7} [2021-03-24 13:38:56,951 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2021-03-24 13:38:56,951 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 7 transitions, 26 flow [2021-03-24 13:38:56,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:56,952 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:38:56,952 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:38:56,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:38:56,952 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:38:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:38:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash 799217319, now seen corresponding path program 2 times [2021-03-24 13:38:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:38:56,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217154236] [2021-03-24 13:38:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:38:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:38:56,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:38:56,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:38:56,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 13:38:57,003 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 13:38:57,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 13:38:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:38:57,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217154236] [2021-03-24 13:38:57,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:38:57,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:38:57,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446723560] [2021-03-24 13:38:57,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:38:57,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:38:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:38:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:38:57,021 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2021-03-24 13:38:57,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 7 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:57,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:38:57,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2021-03-24 13:38:57,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:38:57,040 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 13:38:57,040 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-03-24 13:38:57,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 8 events. 0/8 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 13:38:57,041 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-24 13:38:57,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 7 transitions, 33 flow [2021-03-24 13:38:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:38:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:38:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2021-03-24 13:38:57,042 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2021-03-24 13:38:57,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2021-03-24 13:38:57,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2021-03-24 13:38:57,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:38:57,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2021-03-24 13:38:57,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:57,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:57,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:57,044 INFO L185 Difference]: Start difference. First operand has 16 places, 7 transitions, 26 flow. Second operand 4 states and 48 transitions. [2021-03-24 13:38:57,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 7 transitions, 33 flow [2021-03-24 13:38:57,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:38:57,045 INFO L241 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-03-24 13:38:57,045 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-03-24 13:38:57,045 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2021-03-24 13:38:57,045 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-03-24 13:38:57,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 13:38:57,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:38:57,049 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:38:57 BasicIcfg [2021-03-24 13:38:57,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:38:57,050 INFO L168 Benchmark]: Toolchain (without parser) took 883.80 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 201.0 MB in the end (delta: 35.8 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.0 GB. [2021-03-24 13:38:57,050 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:38:57,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.12 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 13:38:57,051 INFO L168 Benchmark]: Boogie Preprocessor took 13.50 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.4 MB in the end (delta: 824.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:38:57,051 INFO L168 Benchmark]: RCFGBuilder took 189.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 226.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 13:38:57,052 INFO L168 Benchmark]: TraceAbstraction took 650.07 ms. Allocated memory is still 255.9 MB. Free memory was 226.0 MB in the beginning and 201.0 MB in the end (delta: 25.0 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.0 GB. [2021-03-24 13:38:57,054 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 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.12 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.50 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.4 MB in the end (delta: 824.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 189.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 226.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 650.07 ms. Allocated memory is still 255.9 MB. Free memory was 226.0 MB in the beginning and 201.0 MB in the end (delta: 25.0 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 31.3ms, 16 PlacesBefore, 14 PlacesAfterwards, 11 TransitionsBefore, 9 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 7 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 523.8ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 139.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 4 SDslu, 2 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, 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: 4.4ms SsaConstructionTime, 16.3ms SatisfiabilityAnalysisTime, 191.6ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...