/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/cutoff_test.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:54:25,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:54:25,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:54:25,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-25 07:54:25,630 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-RepeatedVariableLbe.epf [2021-03-25 07:54:25,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:54:25,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:54:25,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:54:25,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:54:25,675 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:54:25,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:54:25,675 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:54:25,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:54:25,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:54:25,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:54:25,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:54:25,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:54:25,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:54:25,676 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:54:25,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:54:25,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:25,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:54:25,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:54:25,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:54:26,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:54:26,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:54:26,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:54:26,028 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 07:54:26,028 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 07:54:26,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/cutoff_test.bpl [2021-03-25 07:54:26,030 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/cutoff_test.bpl' [2021-03-25 07:54:26,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:54:26,069 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 07:54:26,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:26,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:54:26,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:54:26,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:26,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:54:26,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:54:26,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:54:26,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/1) ... [2021-03-25 07:54:26,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:54:26,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:54:26,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:54:26,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:54:26,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (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 07:54:26,176 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 07:54:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:54:26,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:54:26,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread1 given in one single declaration [2021-03-25 07:54:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure Thread1 [2021-03-25 07:54:26,178 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread1 [2021-03-25 07:54:26,179 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 07:54:26,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:54:26,281 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-25 07:54:26,282 INFO L202 PluginConnector]: Adding new model cutoff_test.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:26 BoogieIcfgContainer [2021-03-25 07:54:26,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:54:26,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:54:26,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:54:26,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:54:26,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:26" (1/2) ... [2021-03-25 07:54:26,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca6772 and model type cutoff_test.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:54:26, skipping insertion in model container [2021-03-25 07:54:26,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "cutoff_test.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:26" (2/2) ... [2021-03-25 07:54:26,289 INFO L111 eAbstractionObserver]: Analyzing ICFG cutoff_test.bpl [2021-03-25 07:54:26,293 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:54:26,296 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 07:54:26,296 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:54:26,315 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-25 07:54:26,330 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-25 07:54:26,347 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:54:26,347 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:54:26,347 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:54:26,347 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:54:26,347 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:54:26,348 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:54:26,348 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:54:26,348 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:54:26,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 15 transitions, 38 flow [2021-03-25 07:54:26,370 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-03-25 07:54:26,370 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:26,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 14 events. 3/14 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 9. Up to 2 conditions per place. [2021-03-25 07:54:26,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 15 transitions, 38 flow [2021-03-25 07:54:26,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 12 transitions, 30 flow [2021-03-25 07:54:26,377 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:26,385 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 13 places, 12 transitions, 30 flow [2021-03-25 07:54:26,387 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 13 places, 12 transitions, 30 flow [2021-03-25 07:54:26,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 12 transitions, 30 flow [2021-03-25 07:54:26,392 INFO L129 PetriNetUnfolder]: 3/12 cut-off events. [2021-03-25 07:54:26,392 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:26,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 12 events. 3/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 9. Up to 2 conditions per place. [2021-03-25 07:54:26,394 INFO L142 LiptonReduction]: Number of co-enabled transitions 28 [2021-03-25 07:54:26,436 INFO L154 LiptonReduction]: Checked pairs total: 32 [2021-03-25 07:54:26,436 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 07:54:26,438 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 62 [2021-03-25 07:54:26,445 INFO L129 PetriNetUnfolder]: 3/10 cut-off events. [2021-03-25 07:54:26,445 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:26,445 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:26,446 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:26,446 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:26,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1053270385, now seen corresponding path program 1 times [2021-03-25 07:54:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:26,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093003296] [2021-03-25 07:54:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:26,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:26,548 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:26,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:26,556 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 07:54:26,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093003296] [2021-03-25 07:54:26,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:26,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 07:54:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157484678] [2021-03-25 07:54:26,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 07:54:26,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 07:54:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 07:54:26,575 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2021-03-25 07:54:26,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 11 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 07:54:26,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:26,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2021-03-25 07:54:26,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:26,595 INFO L129 PetriNetUnfolder]: 4/17 cut-off events. [2021-03-25 07:54:26,595 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 07:54:26,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 17 events. 4/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 21. Up to 6 conditions per place. [2021-03-25 07:54:26,597 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 3 selfloop transitions, 2 changer transitions 4/13 dead transitions. [2021-03-25 07:54:26,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 13 transitions, 44 flow [2021-03-25 07:54:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 07:54:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 07:54:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2021-03-25 07:54:26,606 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7843137254901961 [2021-03-25 07:54:26,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 40 transitions. [2021-03-25 07:54:26,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 40 transitions. [2021-03-25 07:54:26,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:26,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 40 transitions. [2021-03-25 07:54:26,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,615 INFO L185 Difference]: Start difference. First operand has 12 places, 11 transitions, 28 flow. Second operand 3 states and 40 transitions. [2021-03-25 07:54:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 13 transitions, 44 flow [2021-03-25 07:54:26,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 13 transitions, 40 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:26,619 INFO L241 Difference]: Finished difference. Result has 13 places, 8 transitions, 26 flow [2021-03-25 07:54:26,620 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=13, PETRI_TRANSITIONS=8} [2021-03-25 07:54:26,621 INFO L343 CegarLoopForPetriNet]: 12 programPoint places, 1 predicate places. [2021-03-25 07:54:26,621 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:26,621 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 13 places, 8 transitions, 26 flow [2021-03-25 07:54:26,621 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 13 places, 8 transitions, 26 flow [2021-03-25 07:54:26,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 8 transitions, 26 flow [2021-03-25 07:54:26,625 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-25 07:54:26,625 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:26,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 8 events. 1/8 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 5. Up to 3 conditions per place. [2021-03-25 07:54:26,625 INFO L142 LiptonReduction]: Number of co-enabled transitions 10 [2021-03-25 07:54:26,626 INFO L154 LiptonReduction]: Checked pairs total: 3 [2021-03-25 07:54:26,626 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:26,627 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6 [2021-03-25 07:54:26,628 INFO L480 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 26 flow [2021-03-25 07:54:26,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 07:54:26,628 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:26,628 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:26,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:54:26,628 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1439823025, now seen corresponding path program 2 times [2021-03-25 07:54:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:26,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435609060] [2021-03-25 07:54:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:26,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:26,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:26,655 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:26,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:26,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:26,662 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 07:54:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435609060] [2021-03-25 07:54:26,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:26,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 07:54:26,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83220493] [2021-03-25 07:54:26,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 07:54:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 07:54:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 07:54:26,666 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2021-03-25 07:54:26,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:26,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2021-03-25 07:54:26,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:26,684 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:54:26,684 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2021-03-25 07:54:26,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 1/11 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 2/13 useless extension candidates. Maximal degree in co-relation 6. Up to 4 conditions per place. [2021-03-25 07:54:26,685 INFO L132 encePairwiseOnDemand]: 13/17 looper letters, 2 selfloop transitions, 3 changer transitions 0/9 dead transitions. [2021-03-25 07:54:26,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 9 transitions, 38 flow [2021-03-25 07:54:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 07:54:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 07:54:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2021-03-25 07:54:26,686 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2021-03-25 07:54:26,687 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 50 transitions. [2021-03-25 07:54:26,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 50 transitions. [2021-03-25 07:54:26,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:26,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 50 transitions. [2021-03-25 07:54:26,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 07:54:26,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,689 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,689 INFO L185 Difference]: Start difference. First operand has 12 places, 8 transitions, 26 flow. Second operand 4 states and 50 transitions. [2021-03-25 07:54:26,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 9 transitions, 38 flow [2021-03-25 07:54:26,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 9 transitions, 32 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:26,690 INFO L241 Difference]: Finished difference. Result has 14 places, 9 transitions, 34 flow [2021-03-25 07:54:26,690 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=34, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2021-03-25 07:54:26,691 INFO L343 CegarLoopForPetriNet]: 12 programPoint places, 2 predicate places. [2021-03-25 07:54:26,691 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:26,691 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 9 transitions, 34 flow [2021-03-25 07:54:26,691 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 9 transitions, 34 flow [2021-03-25 07:54:26,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 14 places, 9 transitions, 34 flow [2021-03-25 07:54:26,695 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:54:26,696 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 07:54:26,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 11 events. 1/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 7. Up to 4 conditions per place. [2021-03-25 07:54:26,696 INFO L142 LiptonReduction]: Number of co-enabled transitions 8 [2021-03-25 07:54:26,739 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-25 07:54:26,740 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 07:54:26,740 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 49 [2021-03-25 07:54:26,741 INFO L480 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 37 flow [2021-03-25 07:54:26,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:26,741 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:26,741 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:26,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 07:54:26,742 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1433999365, now seen corresponding path program 3 times [2021-03-25 07:54:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:26,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265666806] [2021-03-25 07:54:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 07:54:26,749 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 07:54:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 07:54:26,753 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 07:54:26,763 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 07:54:26,763 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 07:54:26,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 07:54:26,774 INFO L202 PluginConnector]: Adding new model cutoff_test.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:54:26 BasicIcfg [2021-03-25 07:54:26,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:54:26,775 INFO L168 Benchmark]: Toolchain (without parser) took 705.75 ms. Allocated memory is still 348.1 MB. Free memory was 328.7 MB in the beginning and 304.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:26,776 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.49 ms. Allocated memory is still 348.1 MB. Free memory was 329.8 MB in the beginning and 329.7 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:26,776 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.38 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 327.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:26,777 INFO L168 Benchmark]: Boogie Preprocessor took 15.69 ms. Allocated memory is still 348.1 MB. Free memory was 327.2 MB in the beginning and 326.3 MB in the end (delta: 858.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:26,777 INFO L168 Benchmark]: RCFGBuilder took 171.75 ms. Allocated memory is still 348.1 MB. Free memory was 326.2 MB in the beginning and 317.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:26,778 INFO L168 Benchmark]: TraceAbstraction took 490.49 ms. Allocated memory is still 348.1 MB. Free memory was 317.4 MB in the beginning and 304.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:26,780 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 0.49 ms. Allocated memory is still 348.1 MB. Free memory was 329.8 MB in the beginning and 329.7 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.38 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 327.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.69 ms. Allocated memory is still 348.1 MB. Free memory was 327.2 MB in the beginning and 326.3 MB in the end (delta: 858.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 171.75 ms. Allocated memory is still 348.1 MB. Free memory was 326.2 MB in the beginning and 317.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 490.49 ms. Allocated memory is still 348.1 MB. Free memory was 317.4 MB in the beginning and 304.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 49.2ms, 13 PlacesBefore, 12 PlacesAfterwards, 12 TransitionsBefore, 11 TransitionsAfterwards, 28 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 32 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 17, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 10, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 10, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 17, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 10, unknown conditional: 0, unknown unconditional: 10] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.0ms, 13 PlacesBefore, 12 PlacesAfterwards, 8 TransitionsBefore, 8 TransitionsAfterwards, 10 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 3 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 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: 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] , Cache Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 48.2ms, 14 PlacesBefore, 14 PlacesAfterwards, 9 TransitionsBefore, 9 TransitionsAfterwards, 8 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - CounterExampleResult [Line: 26]: assertion can be violated assertion can be violated We found a FailurePath: [L20] FORK 0 fork 1 Thread1(); [L22] 0 x := 0; VAL [x=0] [L37] 1 x := x + 1; [L23] 0 x := 2 * x; VAL [x=2] [L25] JOIN 1 join 1; VAL [x=2] [L26] 0 assert x != 2; VAL [x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 420.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 75.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 94.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 13 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=2, InterpolantAutomatonStates: 7, 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: 8.0ms SsaConstructionTime, 19.9ms SatisfiabilityAnalysisTime, 61.7ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...