/usr/bin/java -Xmx8000000000 -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/LBE_bigexample_safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:17:00,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:17:00,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:17:00,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 08:17:00,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 08:17:00,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 08:17:00,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 08:17:00,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 08:17:00,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 08:17:00,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 08:17:00,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 08:17:00,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 08:17:00,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 08:17:00,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 08:17:00,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 08:17:00,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 08:17:00,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 08:17:00,196 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 [2021-06-13 08:17:00,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:17:00,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:17:00,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:17:00,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:17:00,243 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:17:00,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:17:00,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:17:00,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:17:00,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:17:00,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:17:00,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:17:00,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:17:00,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:17:00,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:17:00,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:17:00,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:17:00,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:17:00,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:17:00,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:17:00,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:17:00,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:17:00,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:17:00,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:17:00,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:17:00,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:17:00,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:17:00,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:17:00,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:17:00,247 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:17:00,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:17:00,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:17:00,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:17:00,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:17:00,586 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 08:17:00,587 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 08:17:00,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/LBE_bigexample_safe.bpl [2021-06-13 08:17:00,588 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/LBE_bigexample_safe.bpl' [2021-06-13 08:17:00,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:17:00,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 08:17:00,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:17:00,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:17:00,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:17:00,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:17:00,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:17:00,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:17:00,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:17:00,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/1) ... [2021-06-13 08:17:00,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:17:00,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:17:00,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:17:00,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:17:00,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (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 [2021-06-13 08:17:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-13 08:17:00,736 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-13 08:17:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:17:00,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:17:00,739 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 08:17:00,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:17:00,979 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 08:17:00,981 INFO L202 PluginConnector]: Adding new model LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:17:00 BoogieIcfgContainer [2021-06-13 08:17:00,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:17:00,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:17:00,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:17:00,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:17:00,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:17:00" (1/2) ... [2021-06-13 08:17:00,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cee7210 and model type LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:17:00, skipping insertion in model container [2021-06-13 08:17:00,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:17:00" (2/2) ... [2021-06-13 08:17:00,988 INFO L111 eAbstractionObserver]: Analyzing ICFG LBE_bigexample_safe.bpl [2021-06-13 08:17:00,992 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:17:00,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-06-13 08:17:00,993 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:17:01,080 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-06-13 08:17:01,105 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:17:01,124 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:17:01,124 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:17:01,124 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:17:01,124 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:17:01,124 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:17:01,125 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:17:01,125 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:17:01,125 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork1======== [2021-06-13 08:17:01,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:01,174 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-06-13 08:17:01,175 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:17:01,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-06-13 08:17:01,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:01,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 187 flow [2021-06-13 08:17:01,187 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-13 08:17:01,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:01,187 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:17:01,188 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-13 08:17:01,188 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:17:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:17:01,193 INFO L82 PathProgramCache]: Analyzing trace with hash 3466716, now seen corresponding path program 1 times [2021-06-13 08:17:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:17:01,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820771665] [2021-06-13 08:17:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:17:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:17:01,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:17:01,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:17:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:17:01,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:17:01,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820771665] [2021-06-13 08:17:01,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820771665] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:17:01,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:17:01,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-13 08:17:01,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177450234] [2021-06-13 08:17:01,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:17:01,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:17:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:17:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:17:01,331 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2021-06-13 08:17:01,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:01,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:17:01,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2021-06-13 08:17:01,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:17:02,062 INFO L129 PetriNetUnfolder]: 4489/6433 cut-off events. [2021-06-13 08:17:02,062 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2021-06-13 08:17:02,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 6433 events. 4489/6433 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 27276 event pairs, 4456 based on Foata normal form. 0/6419 useless extension candidates. Maximal degree in co-relation 12734. Up to 6157 conditions per place. [2021-06-13 08:17:02,086 INFO L132 encePairwiseOnDemand]: 57/86 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2021-06-13 08:17:02,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:17:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:17:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2021-06-13 08:17:02,099 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2021-06-13 08:17:02,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2021-06-13 08:17:02,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2021-06-13 08:17:02,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:17:02,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2021-06-13 08:17:02,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-06-13 08:17:02,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:02,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:02,115 INFO L185 Difference]: Start difference. First operand has 81 places, 74 transitions, 187 flow. Second operand 3 states and 144 transitions. [2021-06-13 08:17:02,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:02,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-06-13 08:17:02,139 INFO L241 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:02,141 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2021-06-13 08:17:02,142 INFO L335 CegarLoopForPetriNet]: 81 programPoint places, -33 predicate places. [2021-06-13 08:17:02,142 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:02,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:02,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:17:02,144 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork1 was SAFE (1/6) [2021-06-13 08:17:02,146 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:17:02,153 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:17:02,154 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:17:02,154 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:17:02,154 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:17:02,154 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:17:02,154 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:17:02,154 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:17:02,154 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork0======== [2021-06-13 08:17:02,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:02,177 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-06-13 08:17:02,177 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:17:02,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-06-13 08:17:02,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:02,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 187 flow [2021-06-13 08:17:02,182 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-06-13 08:17:02,182 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:02,182 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:17:02,182 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-06-13 08:17:02,183 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr1ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:17:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:17:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 111808, now seen corresponding path program 1 times [2021-06-13 08:17:02,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:17:02,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128785725] [2021-06-13 08:17:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:17:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:17:02,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:17:02,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:17:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:17:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:17:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128785725] [2021-06-13 08:17:02,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128785725] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:17:02,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:17:02,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-13 08:17:02,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471972063] [2021-06-13 08:17:02,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:17:02,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:17:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:17:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:17:02,208 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2021-06-13 08:17:02,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:02,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:17:02,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2021-06-13 08:17:02,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:17:02,714 INFO L129 PetriNetUnfolder]: 4489/6433 cut-off events. [2021-06-13 08:17:02,714 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2021-06-13 08:17:02,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 6433 events. 4489/6433 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 27262 event pairs, 4456 based on Foata normal form. 0/6419 useless extension candidates. Maximal degree in co-relation 12737. Up to 6157 conditions per place. [2021-06-13 08:17:02,735 INFO L132 encePairwiseOnDemand]: 57/86 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2021-06-13 08:17:02,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:17:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:17:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2021-06-13 08:17:02,741 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2021-06-13 08:17:02,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2021-06-13 08:17:02,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2021-06-13 08:17:02,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:17:02,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2021-06-13 08:17:02,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-06-13 08:17:02,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:02,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:02,747 INFO L185 Difference]: Start difference. First operand has 81 places, 74 transitions, 187 flow. Second operand 3 states and 144 transitions. [2021-06-13 08:17:02,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:02,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-06-13 08:17:02,798 INFO L241 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:02,799 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2021-06-13 08:17:02,799 INFO L335 CegarLoopForPetriNet]: 81 programPoint places, -33 predicate places. [2021-06-13 08:17:02,799 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:02,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:02,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 08:17:02,800 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork0 was SAFE (2/6) [2021-06-13 08:17:02,801 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:17:02,802 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:17:02,802 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:17:02,802 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:17:02,802 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:17:02,802 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:17:02,802 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:17:02,802 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:17:02,802 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-13 08:17:02,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:02,810 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-06-13 08:17:02,810 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:17:02,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-06-13 08:17:02,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:02,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-13 08:17:02,811 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-13 08:17:02,811 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:02,812 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/6) [2021-06-13 08:17:02,812 INFO L255 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2021-06-13 08:17:02,813 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:17:02,813 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:17:02,813 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:17:02,813 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:17:02,813 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:17:02,813 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:17:02,813 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:17:02,813 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:17:02,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:02,820 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-06-13 08:17:02,820 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:17:02,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-06-13 08:17:02,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:02,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 64 transitions, 140 flow [2021-06-13 08:17:02,823 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-06-13 08:17:02,823 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:02,823 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:17:02,823 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-13 08:17:02,823 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr18ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr17ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr16ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr19ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr14ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr15ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr12ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr13ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr11ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:17:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:17:02,824 INFO L82 PathProgramCache]: Analyzing trace with hash -963424887, now seen corresponding path program 1 times [2021-06-13 08:17:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:17:02,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492549845] [2021-06-13 08:17:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:17:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:17:02,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:17:02,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:17:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:17:02,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:17:02,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492549845] [2021-06-13 08:17:02,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492549845] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:17:02,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:17:02,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-13 08:17:02,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773313254] [2021-06-13 08:17:02,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:17:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:17:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:17:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:17:02,841 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2021-06-13 08:17:02,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:02,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:17:02,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2021-06-13 08:17:02,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:17:03,235 INFO L129 PetriNetUnfolder]: 4240/5992 cut-off events. [2021-06-13 08:17:03,235 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:03,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11866 conditions, 5992 events. 4240/5992 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 24846 event pairs, 4240 based on Foata normal form. 81/6059 useless extension candidates. Maximal degree in co-relation 11855. Up to 5860 conditions per place. [2021-06-13 08:17:03,251 INFO L132 encePairwiseOnDemand]: 57/86 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2021-06-13 08:17:03,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 36 transitions, 140 flow [2021-06-13 08:17:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:17:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:17:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2021-06-13 08:17:03,254 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5542635658914729 [2021-06-13 08:17:03,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2021-06-13 08:17:03,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2021-06-13 08:17:03,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:17:03,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2021-06-13 08:17:03,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-06-13 08:17:03,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:03,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:03,257 INFO L185 Difference]: Start difference. First operand has 77 places, 64 transitions, 140 flow. Second operand 3 states and 143 transitions. [2021-06-13 08:17:03,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 36 transitions, 140 flow [2021-06-13 08:17:03,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 08:17:03,259 INFO L241 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2021-06-13 08:17:03,259 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2021-06-13 08:17:03,260 INFO L335 CegarLoopForPetriNet]: 77 programPoint places, -30 predicate places. [2021-06-13 08:17:03,260 INFO L482 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2021-06-13 08:17:03,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:03,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 08:17:03,260 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (4/6) [2021-06-13 08:17:03,261 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:17:03,263 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:17:03,263 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:17:03,263 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:17:03,263 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:17:03,263 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:17:03,263 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:17:03,263 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:17:03,263 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork3======== [2021-06-13 08:17:03,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:03,273 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-06-13 08:17:03,273 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:17:03,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-06-13 08:17:03,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:03,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 187 flow [2021-06-13 08:17:03,277 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-06-13 08:17:03,278 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:03,278 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:17:03,278 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-13 08:17:03,278 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr1ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:17:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:17:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash -963424828, now seen corresponding path program 1 times [2021-06-13 08:17:03,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:17:03,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19572882] [2021-06-13 08:17:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:17:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:17:03,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:17:03,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:17:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:17:03,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:17:03,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19572882] [2021-06-13 08:17:03,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19572882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:17:03,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:17:03,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-13 08:17:03,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035220394] [2021-06-13 08:17:03,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:17:03,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:17:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:17:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:17:03,310 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2021-06-13 08:17:03,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:03,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:17:03,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2021-06-13 08:17:03,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:17:03,723 INFO L129 PetriNetUnfolder]: 4489/6433 cut-off events. [2021-06-13 08:17:03,723 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2021-06-13 08:17:03,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 6433 events. 4489/6433 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 27290 event pairs, 4456 based on Foata normal form. 0/6419 useless extension candidates. Maximal degree in co-relation 12728. Up to 6157 conditions per place. [2021-06-13 08:17:03,749 INFO L132 encePairwiseOnDemand]: 57/86 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2021-06-13 08:17:03,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:17:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:17:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2021-06-13 08:17:03,750 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2021-06-13 08:17:03,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2021-06-13 08:17:03,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2021-06-13 08:17:03,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:17:03,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2021-06-13 08:17:03,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-06-13 08:17:03,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:03,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:03,752 INFO L185 Difference]: Start difference. First operand has 81 places, 74 transitions, 187 flow. Second operand 3 states and 144 transitions. [2021-06-13 08:17:03,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:03,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-06-13 08:17:03,759 INFO L241 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:03,759 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2021-06-13 08:17:03,759 INFO L335 CegarLoopForPetriNet]: 81 programPoint places, -33 predicate places. [2021-06-13 08:17:03,759 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:03,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:03,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 08:17:03,760 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork3 was SAFE (5/6) [2021-06-13 08:17:03,760 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:17:03,761 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:17:03,761 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:17:03,761 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:17:03,761 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:17:03,761 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:17:03,761 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:17:03,761 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:17:03,761 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork2======== [2021-06-13 08:17:03,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:03,822 INFO L129 PetriNetUnfolder]: 17/98 cut-off events. [2021-06-13 08:17:03,822 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-13 08:17:03,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 98 events. 17/98 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2021-06-13 08:17:03,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 240 flow [2021-06-13 08:17:03,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 187 flow [2021-06-13 08:17:03,825 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-13 08:17:03,825 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:17:03,825 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:17:03,825 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-06-13 08:17:03,825 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr1ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:17:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:17:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 107469096, now seen corresponding path program 1 times [2021-06-13 08:17:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:17:03,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399689286] [2021-06-13 08:17:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:17:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:17:03,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:17:03,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:17:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:17:03,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:17:03,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399689286] [2021-06-13 08:17:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399689286] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:17:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:17:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-13 08:17:03,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806733090] [2021-06-13 08:17:03,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:17:03,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:17:03,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:17:03,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:17:03,839 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 86 [2021-06-13 08:17:03,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:03,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:17:03,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 86 [2021-06-13 08:17:03,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:17:04,254 INFO L129 PetriNetUnfolder]: 4489/6433 cut-off events. [2021-06-13 08:17:04,254 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2021-06-13 08:17:04,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 6433 events. 4489/6433 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 27286 event pairs, 4456 based on Foata normal form. 0/6419 useless extension candidates. Maximal degree in co-relation 12731. Up to 6157 conditions per place. [2021-06-13 08:17:04,268 INFO L132 encePairwiseOnDemand]: 57/86 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2021-06-13 08:17:04,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:17:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:17:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2021-06-13 08:17:04,270 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2021-06-13 08:17:04,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2021-06-13 08:17:04,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2021-06-13 08:17:04,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:17:04,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2021-06-13 08:17:04,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-06-13 08:17:04,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:04,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2021-06-13 08:17:04,273 INFO L185 Difference]: Start difference. First operand has 81 places, 74 transitions, 187 flow. Second operand 3 states and 144 transitions. [2021-06-13 08:17:04,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 189 flow [2021-06-13 08:17:04,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-06-13 08:17:04,280 INFO L241 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:04,281 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2021-06-13 08:17:04,281 INFO L335 CegarLoopForPetriNet]: 81 programPoint places, -33 predicate places. [2021-06-13 08:17:04,281 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2021-06-13 08:17:04,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-06-13 08:17:04,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 08:17:04,282 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork2 was SAFE (6/6) [2021-06-13 08:17:04,282 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:17:04,289 INFO L202 PluginConnector]: Adding new model LBE_bigexample_safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:17:04 BasicIcfg [2021-06-13 08:17:04,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:17:04,291 INFO L168 Benchmark]: Toolchain (without parser) took 3680.06 ms. Allocated memory was 183.5 MB in the beginning and 622.9 MB in the end (delta: 439.4 MB). Free memory was 163.5 MB in the beginning and 425.0 MB in the end (delta: -261.5 MB). Peak memory consumption was 262.7 MB. Max. memory is 8.0 GB. [2021-06-13 08:17:04,292 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:17:04,296 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.33 ms. Allocated memory is still 183.5 MB. Free memory was 163.4 MB in the beginning and 161.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:17:04,297 INFO L168 Benchmark]: Boogie Preprocessor took 17.27 ms. Allocated memory is still 183.5 MB. Free memory was 161.9 MB in the beginning and 161.1 MB in the end (delta: 796.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:17:04,297 INFO L168 Benchmark]: RCFGBuilder took 318.95 ms. Allocated memory is still 183.5 MB. Free memory was 161.0 MB in the beginning and 148.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-13 08:17:04,297 INFO L168 Benchmark]: TraceAbstraction took 3307.27 ms. Allocated memory was 183.5 MB in the beginning and 622.9 MB in the end (delta: 439.4 MB). Free memory was 148.3 MB in the beginning and 425.0 MB in the end (delta: -276.7 MB). Peak memory consumption was 248.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:17:04,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.33 ms. Allocated memory is still 183.5 MB. Free memory was 163.4 MB in the beginning and 161.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.27 ms. Allocated memory is still 183.5 MB. Free memory was 161.9 MB in the beginning and 161.1 MB in the end (delta: 796.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.95 ms. Allocated memory is still 183.5 MB. Free memory was 161.0 MB in the beginning and 148.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3307.27 ms. Allocated memory was 183.5 MB in the beginning and 622.9 MB in the end (delta: 439.4 MB). Free memory was 148.3 MB in the beginning and 425.0 MB in the end (delta: -276.7 MB). Peak memory consumption was 248.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 52]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 53]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 25]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 40]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 26]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 39]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 27]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 41]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 22]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 23]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 28]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 34]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 30]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 35]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 33]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: fooThread1of1ForFork1 with 1 thread instances CFG has 6 procedures, 85 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1024.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 817.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 28 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 42.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=0, 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: 3.0ms SsaConstructionTime, 22.8ms SatisfiabilityAnalysisTime, 33.8ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: fooThread1of1ForFork0 with 1 thread instances CFG has 6 procedures, 85 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 647.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 593.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 28 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=0, 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: 0.8ms SsaConstructionTime, 1.8ms SatisfiabilityAnalysisTime, 9.0ms InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 2 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: foo with 1 thread instances CFG has 6 procedures, 85 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 9.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, 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: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 6 procedures, 85 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 447.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 423.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 27 SDslu, 0 SDs, 0 SdLazy, 27 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=0, 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: 0.5ms SsaConstructionTime, 1.8ms SatisfiabilityAnalysisTime, 6.6ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: fooThread1of1ForFork3 with 1 thread instances CFG has 6 procedures, 85 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 497.9ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 450.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 28 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=0, 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: 1.4ms SsaConstructionTime, 4.1ms SatisfiabilityAnalysisTime, 10.2ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: fooThread1of1ForFork2 with 1 thread instances CFG has 6 procedures, 85 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 520.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 442.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 28 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=0, 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: 0.3ms SsaConstructionTime, 1.1ms SatisfiabilityAnalysisTime, 8.1ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 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 - AllSpecificationsHoldResult: All specifications hold 22 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...