/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/assume_false.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:37:30,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:37:30,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:37:30,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-10 14:37:30,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 14:37:30,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 14:37:30,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 14:37:30,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 14:37:30,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 14:37:30,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 14:37:30,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 14:37:30,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 14:37:30,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 14:37:30,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 14:37:30,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 14:37:30,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 14:37:30,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 14:37:30,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 14:37:30,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:37:30,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:37:30,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:37:30,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:37:30,332 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:37:30,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:37:30,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:37:30,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:37:30,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:37:30,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:37:30,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:37:30,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:37:30,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:37:30,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:37:30,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:37:30,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:37:30,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:37:30,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:37:30,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:37:30,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:37:30,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:37:30,636 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:37:30,637 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:37:30,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/assume_false.bpl [2021-06-10 14:37:30,638 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/assume_false.bpl' [2021-06-10 14:37:30,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:37:30,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:37:30,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:30,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:37:30,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:37:30,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:30,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:37:30,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:37:30,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:37:30,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... [2021-06-10 14:37:30,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:37:30,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:37:30,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:37:30,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:37:30,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:37:30,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 14:37:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 14:37:30,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 14:37:30,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 14:37:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 14:37:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 14:37:30,744 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:37:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:37:30,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:37:30,745 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 14:37:30,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:37:30,833 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 14:37:30,834 INFO L202 PluginConnector]: Adding new model assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:30 BoogieIcfgContainer [2021-06-10 14:37:30,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:37:30,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:37:30,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:37:30,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:37:30,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "assume_false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:30" (1/2) ... [2021-06-10 14:37:30,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f341028 and model type assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:37:30, skipping insertion in model container [2021-06-10 14:37:30,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:30" (2/2) ... [2021-06-10 14:37:30,841 INFO L111 eAbstractionObserver]: Analyzing ICFG assume_false.bpl [2021-06-10 14:37:30,850 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:37:30,853 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:37:30,854 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:37:30,888 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 14:37:30,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 14:37:30,935 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:30,935 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:30,935 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:30,935 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:30,935 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:30,935 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:30,935 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:30,935 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:30,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 19 places, 12 transitions, 34 flow [2021-06-10 14:37:30,966 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-10 14:37:30,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:30,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-06-10 14:37:30,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 12 transitions, 34 flow [2021-06-10 14:37:30,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 8 transitions, 22 flow [2021-06-10 14:37:30,977 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 14:37:30,977 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:30,977 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:30,978 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 14:37:30,978 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1427046, now seen corresponding path program 1 times [2021-06-10 14:37:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:30,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940954286] [2021-06-10 14:37:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:31,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:31,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:31,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940954286] [2021-06-10 14:37:31,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:31,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 14:37:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814505148] [2021-06-10 14:37:31,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:31,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:31,140 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 12 [2021-06-10 14:37:31,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 8 transitions, 22 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:31,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:31,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 12 [2021-06-10 14:37:31,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:31,162 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-06-10 14:37:31,162 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:37:31,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 3/9 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 14:37:31,163 INFO L132 encePairwiseOnDemand]: 8/12 looper letters, 1 selfloop transitions, 2 changer transitions 0/6 dead transitions. [2021-06-10 14:37:31,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 6 transitions, 24 flow [2021-06-10 14:37:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2021-06-10 14:37:31,186 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2021-06-10 14:37:31,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 26 transitions. [2021-06-10 14:37:31,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 26 transitions. [2021-06-10 14:37:31,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:31,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 26 transitions. [2021-06-10 14:37:31,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:31,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2021-06-10 14:37:31,193 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2021-06-10 14:37:31,195 INFO L185 Difference]: Start difference. First operand has 15 places, 8 transitions, 22 flow. Second operand 3 states and 26 transitions. [2021-06-10 14:37:31,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 6 transitions, 24 flow [2021-06-10 14:37:31,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 22 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 14:37:31,204 INFO L241 Difference]: Finished difference. Result has 14 places, 6 transitions, 24 flow [2021-06-10 14:37:31,206 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=12, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=11, 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=24, PETRI_PLACES=14, PETRI_TRANSITIONS=6} [2021-06-10 14:37:31,206 INFO L343 CegarLoopForPetriNet]: 15 programPoint places, -1 predicate places. [2021-06-10 14:37:31,206 INFO L480 AbstractCegarLoop]: Abstraction has has 14 places, 6 transitions, 24 flow [2021-06-10 14:37:31,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:37:31,207 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:31,207 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-06-10 14:37:31,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:37:31,208 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thread2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash 44229986, now seen corresponding path program 1 times [2021-06-10 14:37:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:31,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334658726] [2021-06-10 14:37:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:31,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 14:37:31,221 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 14:37:31,234 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 14:37:31,234 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 14:37:31,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:37:31,249 INFO L202 PluginConnector]: Adding new model assume_false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:37:31 BasicIcfg [2021-06-10 14:37:31,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:37:31,251 INFO L168 Benchmark]: Toolchain (without parser) took 591.06 ms. Allocated memory is still 369.1 MB. Free memory was 348.4 MB in the beginning and 341.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:31,252 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 369.1 MB. Free memory is still 349.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:31,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.03 ms. Allocated memory is still 369.1 MB. Free memory was 348.4 MB in the beginning and 346.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:31,254 INFO L168 Benchmark]: Boogie Preprocessor took 10.42 ms. Allocated memory is still 369.1 MB. Free memory was 346.9 MB in the beginning and 346.1 MB in the end (delta: 845.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:31,255 INFO L168 Benchmark]: RCFGBuilder took 140.24 ms. Allocated memory is still 369.1 MB. Free memory was 346.0 MB in the beginning and 337.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:31,256 INFO L168 Benchmark]: TraceAbstraction took 413.29 ms. Allocated memory is still 369.1 MB. Free memory was 337.1 MB in the beginning and 341.2 MB in the end (delta: -4.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:31,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 369.1 MB. Free memory is still 349.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.03 ms. Allocated memory is still 369.1 MB. Free memory was 348.4 MB in the beginning and 346.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.42 ms. Allocated memory is still 369.1 MB. Free memory was 346.9 MB in the beginning and 346.1 MB in the end (delta: 845.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 140.24 ms. Allocated memory is still 369.1 MB. Free memory was 346.0 MB in the beginning and 337.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 413.29 ms. Allocated memory is still 369.1 MB. Free memory was 337.1 MB in the beginning and 341.2 MB in the end (delta: -4.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: assertion can be violated assertion can be violated We found a FailurePath: [L19] 0 x := true; VAL [x=true] [L21] FORK 0 fork 1 thread1(); VAL [x=true] [L7] 1 x := false; VAL [x=false] [L22] FORK 0 fork 2 thread2(); VAL [x=false] [L13] 2 assert x; VAL [x=false] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 305.7ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 71.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, InterpolantAutomatonStates: 3, 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: 5.7ms SsaConstructionTime, 12.3ms SatisfiabilityAnalysisTime, 43.2ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 3 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...