/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-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 17:47:05,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 17:47:05,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 17:47:05,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-25 17:47:05,893 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-RepeatedSemanticLbe.epf [2021-03-25 17:47:05,931 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 17:47:05,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 17:47:05,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 17:47:05,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 17:47:05,934 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 17:47:05,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 17:47:05,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 17:47:05,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 17:47:05,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 17:47:05,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 17:47:05,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 17:47:05,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 17:47:05,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 17:47:05,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 17:47:05,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 17:47:05,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 17:47:05,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 17:47:05,938 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 17:47:06,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 17:47:06,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 17:47:06,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 17:47:06,258 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 17:47:06,259 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 17:47:06,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-03-25 17:47:06,260 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-03-25 17:47:06,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 17:47:06,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 17:47:06,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 17:47:06,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 17:47:06,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 17:47:06,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 17:47:06,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 17:47:06,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 17:47:06,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 17:47:06,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/1) ... [2021-03-25 17:47:06,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 17:47:06,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 17:47:06,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 17:47:06,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 17:47:06,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (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 [2021-03-25 17:47:06,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-25 17:47:06,389 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-25 17:47:06,391 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-25 17:47:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 17:47:06,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 17:47:06,392 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 17:47:06,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 17:47:06,510 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-25 17:47:06,511 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 05:47:06 BoogieIcfgContainer [2021-03-25 17:47:06,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 17:47:06,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 17:47:06,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 17:47:06,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 17:47:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:47:06" (1/2) ... [2021-03-25 17:47:06,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f6062b and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 05:47:06, skipping insertion in model container [2021-03-25 17:47:06,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 05:47:06" (2/2) ... [2021-03-25 17:47:06,517 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-03-25 17:47:06,521 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 17:47:06,524 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 17:47:06,525 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 17:47:06,542 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:47:06,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 17:47:06,575 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:47:06,575 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:47:06,576 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:47:06,576 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:47:06,576 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:47:06,576 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:47:06,576 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:47:06,576 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:47:06,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-03-25 17:47:06,595 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 17:47:06,596 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:47:06,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 10 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. [2021-03-25 17:47:06,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 10 transitions, 25 flow [2021-03-25 17:47:06,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 10 transitions, 25 flow [2021-03-25 17:47:06,601 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:06,612 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 13 places, 10 transitions, 25 flow [2021-03-25 17:47:06,615 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 13 places, 10 transitions, 25 flow [2021-03-25 17:47:06,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-03-25 17:47:06,619 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 17:47:06,619 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:47:06,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 13 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. [2021-03-25 17:47:06,621 INFO L142 LiptonReduction]: Number of co-enabled transitions 24 [2021-03-25 17:47:06,721 INFO L154 LiptonReduction]: Checked pairs total: 9 [2021-03-25 17:47:06,722 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 17:47:06,724 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 124 [2021-03-25 17:47:06,730 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-03-25 17:47:06,731 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:47:06,731 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:06,731 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-25 17:47:06,732 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash 59487, now seen corresponding path program 1 times [2021-03-25 17:47:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:06,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208203323] [2021-03-25 17:47:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:47:06,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:06,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:47:06,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208203323] [2021-03-25 17:47:06,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:47:06,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-25 17:47:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883125146] [2021-03-25 17:47:06,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 17:47:06,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:47:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 17:47:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 17:47:06,907 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 14 [2021-03-25 17:47:06,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 7 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-03-25 17:47:06,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:47:06,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 14 [2021-03-25 17:47:06,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:47:06,919 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-25 17:47:06,919 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:47:06,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 7 events. 0/7 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 17:47:06,920 INFO L132 encePairwiseOnDemand]: 11/14 looper letters, 0 selfloop transitions, 2 changer transitions 1/6 dead transitions. [2021-03-25 17:47:06,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 6 transitions, 21 flow [2021-03-25 17:47:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 17:47:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 17:47:06,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2021-03-25 17:47:06,928 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5 [2021-03-25 17:47:06,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 21 transitions. [2021-03-25 17:47:06,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 21 transitions. [2021-03-25 17:47:06,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:47:06,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 21 transitions. [2021-03-25 17:47:06,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-03-25 17:47:06,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-03-25 17:47:06,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-03-25 17:47:06,937 INFO L185 Difference]: Start difference. First operand has 10 places, 7 transitions, 19 flow. Second operand 3 states and 21 transitions. [2021-03-25 17:47:06,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 6 transitions, 21 flow [2021-03-25 17:47:06,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 6 transitions, 21 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 17:47:06,940 INFO L241 Difference]: Finished difference. Result has 11 places, 5 transitions, 19 flow [2021-03-25 17:47:06,942 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=19, PETRI_PLACES=11, PETRI_TRANSITIONS=5} [2021-03-25 17:47:06,943 INFO L343 CegarLoopForPetriNet]: 10 programPoint places, 1 predicate places. [2021-03-25 17:47:06,943 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:06,943 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 11 places, 5 transitions, 19 flow [2021-03-25 17:47:06,943 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 11 places, 5 transitions, 19 flow [2021-03-25 17:47:06,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 10 places, 5 transitions, 19 flow [2021-03-25 17:47:06,946 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-03-25 17:47:06,946 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:47:06,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 0/5 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 17:47:06,946 INFO L142 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-25 17:47:06,947 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 17:47:06,947 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:47:06,947 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 17:47:06,949 INFO L480 AbstractCegarLoop]: Abstraction has has 10 places, 5 transitions, 19 flow [2021-03-25 17:47:06,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-03-25 17:47:06,949 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:06,949 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-25 17:47:06,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 17:47:06,949 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1843627, now seen corresponding path program 1 times [2021-03-25 17:47:06,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:06,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111473757] [2021-03-25 17:47:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:06,960 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:06,966 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:06,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:47:06,976 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:47:06,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 17:47:06,977 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-25 17:47:06,978 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-25 17:47:06,985 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:47:06,986 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-25 17:47:06,987 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:47:06,988 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:47:06,988 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:47:06,988 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:47:06,988 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:47:06,988 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:47:06,988 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:47:06,988 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:47:06,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-25 17:47:06,993 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-25 17:47:06,994 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 17:47:06,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 31 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 17:47:06,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-03-25 17:47:06,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-03-25 17:47:06,994 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:06,995 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-25 17:47:06,995 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 42 flow [2021-03-25 17:47:06,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-03-25 17:47:06,999 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-25 17:47:07,000 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 17:47:07,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 17:47:07,000 INFO L142 LiptonReduction]: Number of co-enabled transitions 88 [2021-03-25 17:47:07,119 INFO L154 LiptonReduction]: Checked pairs total: 121 [2021-03-25 17:47:07,119 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-25 17:47:07,119 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 125 [2021-03-25 17:47:07,122 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-25 17:47:07,123 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 17:47:07,123 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:07,123 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-25 17:47:07,123 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2522016, now seen corresponding path program 1 times [2021-03-25 17:47:07,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:07,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127347284] [2021-03-25 17:47:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:47:07,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:47:07,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127347284] [2021-03-25 17:47:07,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:47:07,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 17:47:07,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417401730] [2021-03-25 17:47:07,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 17:47:07,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:47:07,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 17:47:07,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 17:47:07,145 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 20 [2021-03-25 17:47:07,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 12 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2021-03-25 17:47:07,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:47:07,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 20 [2021-03-25 17:47:07,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:47:07,186 INFO L129 PetriNetUnfolder]: 5/27 cut-off events. [2021-03-25 17:47:07,186 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 17:47:07,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 55 event pairs, 1 based on Foata normal form. 2/22 useless extension candidates. Maximal degree in co-relation 38. Up to 15 conditions per place. [2021-03-25 17:47:07,188 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 2 selfloop transitions, 9 changer transitions 0/16 dead transitions. [2021-03-25 17:47:07,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 16 transitions, 66 flow [2021-03-25 17:47:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 17:47:07,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 17:47:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-03-25 17:47:07,190 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5625 [2021-03-25 17:47:07,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-03-25 17:47:07,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-03-25 17:47:07,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:47:07,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-03-25 17:47:07,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:47:07,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-03-25 17:47:07,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-03-25 17:47:07,194 INFO L185 Difference]: Start difference. First operand has 17 places, 12 transitions, 36 flow. Second operand 4 states and 45 transitions. [2021-03-25 17:47:07,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 16 transitions, 66 flow [2021-03-25 17:47:07,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 16 transitions, 64 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-03-25 17:47:07,196 INFO L241 Difference]: Finished difference. Result has 21 places, 16 transitions, 72 flow [2021-03-25 17:47:07,196 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2021-03-25 17:47:07,196 INFO L343 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2021-03-25 17:47:07,197 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:07,197 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 16 transitions, 72 flow [2021-03-25 17:47:07,197 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 16 transitions, 72 flow [2021-03-25 17:47:07,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 16 transitions, 72 flow [2021-03-25 17:47:07,202 INFO L129 PetriNetUnfolder]: 5/27 cut-off events. [2021-03-25 17:47:07,203 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 17:47:07,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 27 events. 5/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 70 event pairs, 1 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 48. Up to 15 conditions per place. [2021-03-25 17:47:07,206 INFO L142 LiptonReduction]: Number of co-enabled transitions 64 [2021-03-25 17:47:07,230 INFO L154 LiptonReduction]: Checked pairs total: 3 [2021-03-25 17:47:07,230 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 17:47:07,230 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 33 [2021-03-25 17:47:07,232 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 72 flow [2021-03-25 17:47:07,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2021-03-25 17:47:07,233 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:07,234 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2021-03-25 17:47:07,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 17:47:07,234 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1871568349, now seen corresponding path program 1 times [2021-03-25 17:47:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:07,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244223315] [2021-03-25 17:47:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:07,249 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:07,265 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:07,266 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:47:07,267 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:47:07,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 17:47:07,267 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-25 17:47:07,268 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-25 17:47:07,275 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:47:07,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-25 17:47:07,276 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:47:07,276 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:47:07,276 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:47:07,276 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:47:07,277 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:47:07,277 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:47:07,277 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:47:07,277 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:47:07,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-03-25 17:47:07,282 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-25 17:47:07,283 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 17:47:07,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 25 events. 0/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 17:47:07,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 20 transitions, 61 flow [2021-03-25 17:47:07,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 61 flow [2021-03-25 17:47:07,284 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:07,284 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 20 transitions, 61 flow [2021-03-25 17:47:07,284 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 20 transitions, 61 flow [2021-03-25 17:47:07,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-03-25 17:47:07,296 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-03-25 17:47:07,297 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 17:47:07,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 25 events. 0/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-25 17:47:07,298 INFO L142 LiptonReduction]: Number of co-enabled transitions 192 [2021-03-25 17:47:07,465 INFO L154 LiptonReduction]: Checked pairs total: 293 [2021-03-25 17:47:07,465 INFO L156 LiptonReduction]: Total number of compositions: 7 [2021-03-25 17:47:07,465 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 181 [2021-03-25 17:47:07,474 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-25 17:47:07,475 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 17:47:07,475 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:07,475 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-25 17:47:07,475 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash 3564828, now seen corresponding path program 1 times [2021-03-25 17:47:07,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:07,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981425822] [2021-03-25 17:47:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:47:07,495 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,500 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:47:07,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981425822] [2021-03-25 17:47:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:47:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 17:47:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376163820] [2021-03-25 17:47:07,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 17:47:07,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:47:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 17:47:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 17:47:07,506 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2021-03-25 17:47:07,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:47:07,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:47:07,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2021-03-25 17:47:07,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:47:07,598 INFO L129 PetriNetUnfolder]: 69/141 cut-off events. [2021-03-25 17:47:07,599 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 17:47:07,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 141 events. 69/141 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 542 event pairs, 21 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 260. Up to 124 conditions per place. [2021-03-25 17:47:07,602 INFO L132 encePairwiseOnDemand]: 17/27 looper letters, 9 selfloop transitions, 13 changer transitions 0/28 dead transitions. [2021-03-25 17:47:07,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 121 flow [2021-03-25 17:47:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 17:47:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 17:47:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2021-03-25 17:47:07,607 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2021-03-25 17:47:07,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2021-03-25 17:47:07,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2021-03-25 17:47:07,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:47:07,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2021-03-25 17:47:07,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-03-25 17:47:07,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-03-25 17:47:07,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-03-25 17:47:07,615 INFO L185 Difference]: Start difference. First operand has 23 places, 16 transitions, 53 flow. Second operand 4 states and 65 transitions. [2021-03-25 17:47:07,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 121 flow [2021-03-25 17:47:07,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 115 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-25 17:47:07,616 INFO L241 Difference]: Finished difference. Result has 27 places, 28 transitions, 127 flow [2021-03-25 17:47:07,617 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2021-03-25 17:47:07,617 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2021-03-25 17:47:07,617 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:07,618 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 28 transitions, 127 flow [2021-03-25 17:47:07,619 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 28 transitions, 127 flow [2021-03-25 17:47:07,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 28 transitions, 127 flow [2021-03-25 17:47:07,634 INFO L129 PetriNetUnfolder]: 38/102 cut-off events. [2021-03-25 17:47:07,634 INFO L130 PetriNetUnfolder]: For 5/8 co-relation queries the response was YES. [2021-03-25 17:47:07,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 102 events. 38/102 cut-off events. For 5/8 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 474 event pairs, 10 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 214. Up to 61 conditions per place. [2021-03-25 17:47:07,638 INFO L142 LiptonReduction]: Number of co-enabled transitions 174 [2021-03-25 17:47:07,647 INFO L154 LiptonReduction]: Checked pairs total: 7 [2021-03-25 17:47:07,647 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:47:07,647 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 30 [2021-03-25 17:47:07,648 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 127 flow [2021-03-25 17:47:07,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:47:07,649 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:07,649 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:47:07,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 17:47:07,649 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1189868134, now seen corresponding path program 1 times [2021-03-25 17:47:07,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:07,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851201627] [2021-03-25 17:47:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:47:07,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,684 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:07,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-25 17:47:07,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851201627] [2021-03-25 17:47:07,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:47:07,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 17:47:07,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038523839] [2021-03-25 17:47:07,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 17:47:07,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:47:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 17:47:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-25 17:47:07,700 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2021-03-25 17:47:07,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-03-25 17:47:07,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:47:07,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2021-03-25 17:47:07,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:47:07,767 INFO L129 PetriNetUnfolder]: 30/93 cut-off events. [2021-03-25 17:47:07,767 INFO L130 PetriNetUnfolder]: For 39/153 co-relation queries the response was YES. [2021-03-25 17:47:07,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 93 events. 30/93 cut-off events. For 39/153 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 381 event pairs, 8 based on Foata normal form. 29/88 useless extension candidates. Maximal degree in co-relation 277. Up to 52 conditions per place. [2021-03-25 17:47:07,769 INFO L132 encePairwiseOnDemand]: 17/27 looper letters, 6 selfloop transitions, 16 changer transitions 0/28 dead transitions. [2021-03-25 17:47:07,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 171 flow [2021-03-25 17:47:07,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 17:47:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 17:47:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-03-25 17:47:07,772 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2021-03-25 17:47:07,772 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-03-25 17:47:07,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-03-25 17:47:07,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:47:07,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-03-25 17:47:07,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:47:07,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 17:47:07,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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) [2021-03-25 17:47:07,774 INFO L185 Difference]: Start difference. First operand has 27 places, 28 transitions, 127 flow. Second operand 5 states and 75 transitions. [2021-03-25 17:47:07,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 171 flow [2021-03-25 17:47:07,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 171 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 17:47:07,777 INFO L241 Difference]: Finished difference. Result has 32 places, 28 transitions, 174 flow [2021-03-25 17:47:07,777 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2021-03-25 17:47:07,778 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2021-03-25 17:47:07,778 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:07,778 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 28 transitions, 174 flow [2021-03-25 17:47:07,779 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 28 transitions, 174 flow [2021-03-25 17:47:07,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 28 transitions, 174 flow [2021-03-25 17:47:07,786 INFO L129 PetriNetUnfolder]: 30/93 cut-off events. [2021-03-25 17:47:07,786 INFO L130 PetriNetUnfolder]: For 57/80 co-relation queries the response was YES. [2021-03-25 17:47:07,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 93 events. 30/93 cut-off events. For 57/80 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 380 event pairs, 8 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 277. Up to 52 conditions per place. [2021-03-25 17:47:07,789 INFO L142 LiptonReduction]: Number of co-enabled transitions 146 [2021-03-25 17:47:07,806 INFO L154 LiptonReduction]: Checked pairs total: 7 [2021-03-25 17:47:07,806 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 17:47:07,806 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 28 [2021-03-25 17:47:07,808 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2021-03-25 17:47:07,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-03-25 17:47:07,809 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:07,809 INFO L263 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2021-03-25 17:47:07,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 17:47:07,809 INFO L428 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1768301247, now seen corresponding path program 1 times [2021-03-25 17:47:07,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:07,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029706780] [2021-03-25 17:47:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:07,824 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:07,835 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:07,838 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:47:07,839 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:47:07,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-25 17:47:07,840 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-25 17:47:07,841 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-25 17:47:07,852 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:47:07,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-25 17:47:07,855 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:47:07,855 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:47:07,855 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:47:07,855 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:47:07,855 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:47:07,855 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:47:07,856 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:47:07,856 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:47:07,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-03-25 17:47:07,858 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-03-25 17:47:07,859 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-25 17:47:07,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 32 events. 0/32 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-25 17:47:07,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 25 transitions, 82 flow [2021-03-25 17:47:07,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 25 transitions, 82 flow [2021-03-25 17:47:07,859 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:07,859 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 25 transitions, 82 flow [2021-03-25 17:47:07,860 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 25 transitions, 82 flow [2021-03-25 17:47:07,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-03-25 17:47:07,862 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-03-25 17:47:07,862 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-25 17:47:07,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 32 events. 0/32 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-25 17:47:07,862 INFO L142 LiptonReduction]: Number of co-enabled transitions 336 [2021-03-25 17:47:08,097 INFO L154 LiptonReduction]: Checked pairs total: 523 [2021-03-25 17:47:08,098 INFO L156 LiptonReduction]: Total number of compositions: 9 [2021-03-25 17:47:08,098 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 239 [2021-03-25 17:47:08,099 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 17:47:08,100 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 17:47:08,100 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:08,100 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-25 17:47:08,100 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:08,100 INFO L82 PathProgramCache]: Analyzing trace with hash 4643870, now seen corresponding path program 1 times [2021-03-25 17:47:08,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:08,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790602071] [2021-03-25 17:47:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:47:08,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:08,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:08,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:08,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:47:08,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790602071] [2021-03-25 17:47:08,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:47:08,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 17:47:08,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187149770] [2021-03-25 17:47:08,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 17:47:08,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:47:08,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 17:47:08,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 17:47:08,115 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2021-03-25 17:47:08,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-03-25 17:47:08,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:47:08,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2021-03-25 17:47:08,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:47:08,223 INFO L129 PetriNetUnfolder]: 489/755 cut-off events. [2021-03-25 17:47:08,223 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-03-25 17:47:08,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 755 events. 489/755 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 3566 event pairs, 213 based on Foata normal form. 4/491 useless extension candidates. Maximal degree in co-relation 1482. Up to 733 conditions per place. [2021-03-25 17:47:08,232 INFO L132 encePairwiseOnDemand]: 21/34 looper letters, 12 selfloop transitions, 17 changer transitions 0/36 dead transitions. [2021-03-25 17:47:08,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 162 flow [2021-03-25 17:47:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 17:47:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 17:47:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2021-03-25 17:47:08,235 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2021-03-25 17:47:08,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 81 transitions. [2021-03-25 17:47:08,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 81 transitions. [2021-03-25 17:47:08,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:47:08,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 81 transitions. [2021-03-25 17:47:08,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-03-25 17:47:08,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-03-25 17:47:08,238 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-03-25 17:47:08,238 INFO L185 Difference]: Start difference. First operand has 29 places, 20 transitions, 72 flow. Second operand 4 states and 81 transitions. [2021-03-25 17:47:08,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 162 flow [2021-03-25 17:47:08,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 150 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-25 17:47:08,240 INFO L241 Difference]: Finished difference. Result has 33 places, 36 transitions, 166 flow [2021-03-25 17:47:08,240 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=33, PETRI_TRANSITIONS=36} [2021-03-25 17:47:08,240 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2021-03-25 17:47:08,241 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:08,241 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 36 transitions, 166 flow [2021-03-25 17:47:08,241 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 36 transitions, 166 flow [2021-03-25 17:47:08,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 33 places, 36 transitions, 166 flow [2021-03-25 17:47:08,263 INFO L129 PetriNetUnfolder]: 196/393 cut-off events. [2021-03-25 17:47:08,263 INFO L130 PetriNetUnfolder]: For 7/28 co-relation queries the response was YES. [2021-03-25 17:47:08,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 393 events. 196/393 cut-off events. For 7/28 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 2211 event pairs, 76 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 820. Up to 211 conditions per place. [2021-03-25 17:47:08,268 INFO L142 LiptonReduction]: Number of co-enabled transitions 282 [2021-03-25 17:47:08,299 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 17:47:08,299 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:47:08,300 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 59 [2021-03-25 17:47:08,302 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 36 transitions, 166 flow [2021-03-25 17:47:08,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-03-25 17:47:08,302 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:08,302 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:47:08,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-25 17:47:08,303 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash 898899754, now seen corresponding path program 1 times [2021-03-25 17:47:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:08,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935285908] [2021-03-25 17:47:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:47:08,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:08,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:08,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:08,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:08,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:47:08,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:47:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-25 17:47:08,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935285908] [2021-03-25 17:47:08,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:47:08,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 17:47:08,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930595345] [2021-03-25 17:47:08,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 17:47:08,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:47:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 17:47:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-25 17:47:08,349 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2021-03-25 17:47:08,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-03-25 17:47:08,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:47:08,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2021-03-25 17:47:08,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:47:08,471 INFO L129 PetriNetUnfolder]: 323/647 cut-off events. [2021-03-25 17:47:08,471 INFO L130 PetriNetUnfolder]: For 276/720 co-relation queries the response was YES. [2021-03-25 17:47:08,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 647 events. 323/647 cut-off events. For 276/720 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 3805 event pairs, 93 based on Foata normal form. 150/570 useless extension candidates. Maximal degree in co-relation 1960. Up to 409 conditions per place. [2021-03-25 17:47:08,478 INFO L132 encePairwiseOnDemand]: 21/34 looper letters, 12 selfloop transitions, 25 changer transitions 0/44 dead transitions. [2021-03-25 17:47:08,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 272 flow [2021-03-25 17:47:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 17:47:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 17:47:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2021-03-25 17:47:08,481 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5941176470588235 [2021-03-25 17:47:08,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2021-03-25 17:47:08,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2021-03-25 17:47:08,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:47:08,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2021-03-25 17:47:08,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-03-25 17:47:08,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2021-03-25 17:47:08,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2021-03-25 17:47:08,484 INFO L185 Difference]: Start difference. First operand has 33 places, 36 transitions, 166 flow. Second operand 5 states and 101 transitions. [2021-03-25 17:47:08,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 272 flow [2021-03-25 17:47:08,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-25 17:47:08,487 INFO L241 Difference]: Finished difference. Result has 39 places, 44 transitions, 297 flow [2021-03-25 17:47:08,487 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=39, PETRI_TRANSITIONS=44} [2021-03-25 17:47:08,488 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2021-03-25 17:47:08,488 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:47:08,488 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 44 transitions, 297 flow [2021-03-25 17:47:08,488 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 44 transitions, 297 flow [2021-03-25 17:47:08,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 39 places, 44 transitions, 297 flow [2021-03-25 17:47:08,535 INFO L129 PetriNetUnfolder]: 323/647 cut-off events. [2021-03-25 17:47:08,535 INFO L130 PetriNetUnfolder]: For 573/793 co-relation queries the response was YES. [2021-03-25 17:47:08,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 647 events. 323/647 cut-off events. For 573/793 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3963 event pairs, 91 based on Foata normal form. 2/584 useless extension candidates. Maximal degree in co-relation 2140. Up to 409 conditions per place. [2021-03-25 17:47:08,542 INFO L142 LiptonReduction]: Number of co-enabled transitions 278 [2021-03-25 17:47:08,792 INFO L154 LiptonReduction]: Checked pairs total: 15 [2021-03-25 17:47:08,793 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 17:47:08,793 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 305 [2021-03-25 17:47:08,793 INFO L480 AbstractCegarLoop]: Abstraction has has 39 places, 43 transitions, 295 flow [2021-03-25 17:47:08,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-03-25 17:47:08,794 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:47:08,794 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:47:08,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-25 17:47:08,794 INFO L428 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 17:47:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:47:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash -978901220, now seen corresponding path program 1 times [2021-03-25 17:47:08,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:47:08,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148849820] [2021-03-25 17:47:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:47:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:08,802 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 17:47:08,812 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 17:47:08,815 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 17:47:08,815 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 17:47:08,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-25 17:47:08,830 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 05:47:08 BasicIcfg [2021-03-25 17:47:08,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 17:47:08,831 INFO L168 Benchmark]: Toolchain (without parser) took 2538.36 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 236.6 MB in the beginning and 312.3 MB in the end (delta: -75.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.0 GB. [2021-03-25 17:47:08,831 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 237.5 MB in the end (delta: 162.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 17:47:08,832 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.34 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 17:47:08,832 INFO L168 Benchmark]: Boogie Preprocessor took 13.09 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 938.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 17:47:08,832 INFO L168 Benchmark]: RCFGBuilder took 179.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 240.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-25 17:47:08,832 INFO L168 Benchmark]: TraceAbstraction took 2317.85 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 240.4 MB in the beginning and 312.3 MB in the end (delta: -71.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.0 GB. [2021-03-25 17:47:08,835 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 237.5 MB in the end (delta: 162.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.34 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.09 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 938.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 179.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 240.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2317.85 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 240.4 MB in the beginning and 312.3 MB in the end (delta: -71.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 106.9ms, 13 PlacesBefore, 10 PlacesAfterwards, 10 TransitionsBefore, 7 TransitionsAfterwards, 24 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 9 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9, positive: 9, positive conditional: 0, positive unconditional: 9, 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: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ 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] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9, positive: 3, positive conditional: 0, positive unconditional: 3, 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7ms, 11 PlacesBefore, 10 PlacesAfterwards, 5 TransitionsBefore, 5 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 123.9ms, 20 PlacesBefore, 17 PlacesAfterwards, 15 TransitionsBefore, 12 TransitionsAfterwards, 88 CoEnabledTransitionPairs, 3 FixpointIterations, 3 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 121 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 85, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 40, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 40, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 40, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 23, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 85, positive: 33, positive conditional: 0, positive unconditional: 33, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 40, unknown conditional: 0, unknown unconditional: 40] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 32.8ms, 21 PlacesBefore, 21 PlacesAfterwards, 16 TransitionsBefore, 16 TransitionsAfterwards, 64 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 3 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 180.8ms, 27 PlacesBefore, 23 PlacesAfterwards, 20 TransitionsBefore, 16 TransitionsAfterwards, 192 CoEnabledTransitionPairs, 3 FixpointIterations, 3 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 7 TotalNumberOfCompositions, 293 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 130, positive: 108, positive conditional: 0, positive unconditional: 108, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 81, positive: 76, positive conditional: 0, positive unconditional: 76, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 81, positive: 76, positive conditional: 0, positive unconditional: 76, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 81, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 50, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 130, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 81, unknown conditional: 0, unknown unconditional: 81] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 28.3ms, 27 PlacesBefore, 27 PlacesAfterwards, 28 TransitionsBefore, 28 TransitionsAfterwards, 174 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 7 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 4, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 27.8ms, 32 PlacesBefore, 32 PlacesAfterwards, 28 TransitionsBefore, 27 TransitionsAfterwards, 146 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 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: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 238.2ms, 34 PlacesBefore, 29 PlacesAfterwards, 25 TransitionsBefore, 20 TransitionsAfterwards, 336 CoEnabledTransitionPairs, 3 FixpointIterations, 4 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 9 TotalNumberOfCompositions, 523 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 227, positive: 198, positive conditional: 0, positive unconditional: 198, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 153, positive: 143, positive conditional: 0, positive unconditional: 143, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 153, positive: 143, positive conditional: 0, positive unconditional: 143, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 153, positive: 127, positive conditional: 0, positive unconditional: 127, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 26, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 64, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 227, positive: 55, positive conditional: 0, positive unconditional: 55, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 153, unknown conditional: 0, unknown unconditional: 153] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 58.5ms, 33 PlacesBefore, 33 PlacesAfterwards, 36 TransitionsBefore, 36 TransitionsAfterwards, 282 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 304.6ms, 39 PlacesBefore, 39 PlacesAfterwards, 44 TransitionsBefore, 43 TransitionsAfterwards, 278 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 15 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, 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: 10, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 15, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 10, unknown conditional: 0, unknown unconditional: 10] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - CounterExampleResult [Line: 31]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 newid := 0; [L18] 0 n := 0; VAL [n=0, newid=0] [L21] FORK 0 fork newid foo(); VAL [n=0, newid=0] [L30] 1 n := n + 1; [L31] 1 assert n <= 2; [L22] 0 newid := newid + 1; VAL [n=1, newid=1] [L21] FORK 0 fork newid foo(); VAL [n=1, newid=1] [L30] 2 n := n + 1; [L31] 2 assert n <= 2; [L22] 0 newid := newid + 1; VAL [n=2, newid=2] [L21] FORK 0 fork newid foo(); VAL [n=2, newid=2] [L30] 3 n := n + 1; VAL [n=3, newid=2] [L31] 3 assert n <= 2; VAL [n=3, newid=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. Started 4 CEGAR loops. EmptinessCheckTime: 11.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2211.0ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 550.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 719.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 163 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 153.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=297occurred in iteration=2, InterpolantAutomatonStates: 25, 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: 10.6ms SsaConstructionTime, 66.7ms SatisfiabilityAnalysisTime, 157.0ms InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 69 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...