/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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:19:43,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:19:43,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:19:43,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:19:43,110 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-FA-NoLbe.epf [2021-06-05 03:19:43,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:19:43,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:19:43,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:19:43,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:19:43,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:19:43,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:19:43,128 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:19:43,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:19:43,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:19:43,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:19:43,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:19:43,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:19:43,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:19:43,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:19:43,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:19:43,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:19:43,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:19:43,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:19:43,421 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:19:43,424 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:19:43,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-06-05 03:19:43,425 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-06-05 03:19:43,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:19:43,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:19:43,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:19:43,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:19:43,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:19:43,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:19:43,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:19:43,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:19:43,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:19:43,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/1) ... [2021-06-05 03:19:43,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:19:43,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:19:43,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:19:43,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:19:43,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (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 [2021-06-05 03:19:43,590 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-05 03:19:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-05 03:19:43,590 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-05 03:19:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:19:43,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:19:43,591 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:19:43,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:19:43,693 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-05 03:19:43,694 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:43 BoogieIcfgContainer [2021-06-05 03:19:43,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:19:43,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:19:43,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:19:43,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:19:43,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:43" (1/2) ... [2021-06-05 03:19:43,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b382be9 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:19:43, skipping insertion in model container [2021-06-05 03:19:43,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:43" (2/2) ... [2021-06-05 03:19:43,699 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-06-05 03:19:43,703 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:19:43,703 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:19:43,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:19:43,704 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:19:43,722 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:19:43,743 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:19:43,765 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:19:43,765 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:19:43,765 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:19:43,765 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:19:43,765 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:19:43,765 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:19:43,765 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:19:43,765 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:19:43,771 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 25 flow [2021-06-05 03:19:43,778 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:19:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:19:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:19:43,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:43,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:19:43,787 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash 42091544, now seen corresponding path program 1 times [2021-06-05 03:19:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:43,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503999169] [2021-06-05 03:19:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:43,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:19:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503999169] [2021-06-05 03:19:43,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503999169] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:19:43,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:19:43,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:19:43,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329451254] [2021-06-05 03:19:43,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:19:43,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:19:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:19:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:43,915 INFO L87 Difference]: Start difference. First operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:19:43,932 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-06-05 03:19:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:19:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) Word has length 5 [2021-06-05 03:19:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:19:43,938 INFO L225 Difference]: With dead ends: 20 [2021-06-05 03:19:43,938 INFO L226 Difference]: Without dead ends: 15 [2021-06-05 03:19:43,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-06-05 03:19:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-06-05 03:19:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:19:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2021-06-05 03:19:43,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 5 [2021-06-05 03:19:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:19:43,957 INFO L482 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-06-05 03:19:43,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2021-06-05 03:19:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:19:43,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:43,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:19:43,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:19:43,958 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:43,959 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-06-05 03:19:43,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:43,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684126675] [2021-06-05 03:19:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:43,964 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:43,967 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:43,975 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:19:43,975 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:19:43,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:19:43,976 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:19:43,976 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 03:19:43,981 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:19:43,982 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:19:43,983 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:19:43,983 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:19:43,983 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:19:43,983 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:19:43,983 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:19:43,983 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:19:43,983 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:19:43,983 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:19:43,984 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 03:19:43,991 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 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) [2021-06-05 03:19:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 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) [2021-06-05 03:19:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:19:43,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:43,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:19:43,992 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash 56409963, now seen corresponding path program 1 times [2021-06-05 03:19:43,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:43,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678994608] [2021-06-05 03:19:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:44,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:19:44,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678994608] [2021-06-05 03:19:44,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678994608] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:19:44,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:19:44,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:19:44,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647846945] [2021-06-05 03:19:44,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:19:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:19:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:19:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:44,011 INFO L87 Difference]: Start difference. First operand has 119 states, 108 states have (on average 2.462962962962963) internal successors, (266), 118 states have internal predecessors, (266), 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) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:19:44,033 INFO L93 Difference]: Finished difference Result 108 states and 238 transitions. [2021-06-05 03:19:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:19:44,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) Word has length 5 [2021-06-05 03:19:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:19:44,036 INFO L225 Difference]: With dead ends: 108 [2021-06-05 03:19:44,036 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 03:19:44,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 03:19:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-06-05 03:19:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 2.369565217391304) internal successors, (218), 98 states have internal predecessors, (218), 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) [2021-06-05 03:19:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-06-05 03:19:44,050 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 5 [2021-06-05 03:19:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:19:44,050 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-06-05 03:19:44,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-06-05 03:19:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:19:44,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:44,051 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-06-05 03:19:44,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:19:44,051 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-06-05 03:19:44,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:44,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289253282] [2021-06-05 03:19:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:44,056 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:44,059 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:44,061 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:19:44,061 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:19:44,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:19:44,061 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:19:44,061 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 03:19:44,078 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:19:44,078 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 03:19:44,079 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:19:44,079 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:19:44,080 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:19:44,080 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:19:44,080 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:19:44,080 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:19:44,080 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:19:44,080 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:19:44,081 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 61 flow [2021-06-05 03:19:44,139 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 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) [2021-06-05 03:19:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 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) [2021-06-05 03:19:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:19:44,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:44,153 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:19:44,153 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash 75500163, now seen corresponding path program 1 times [2021-06-05 03:19:44,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:44,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462915562] [2021-06-05 03:19:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:44,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:19:44,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462915562] [2021-06-05 03:19:44,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462915562] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:19:44,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:19:44,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:19:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922769129] [2021-06-05 03:19:44,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:19:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:19:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:19:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:44,179 INFO L87 Difference]: Start difference. First operand has 594 states, 571 states have (on average 3.1541155866900175) internal successors, (1801), 593 states have internal predecessors, (1801), 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) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:19:44,237 INFO L93 Difference]: Finished difference Result 573 states and 1732 transitions. [2021-06-05 03:19:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:19:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) Word has length 5 [2021-06-05 03:19:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:19:44,246 INFO L225 Difference]: With dead ends: 573 [2021-06-05 03:19:44,246 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 03:19:44,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 03:19:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-06-05 03:19:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 538 states have (on average 3.1226765799256504) internal successors, (1680), 555 states have internal predecessors, (1680), 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) [2021-06-05 03:19:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1680 transitions. [2021-06-05 03:19:44,317 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1680 transitions. Word has length 5 [2021-06-05 03:19:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:19:44,317 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1680 transitions. [2021-06-05 03:19:44,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1680 transitions. [2021-06-05 03:19:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:19:44,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:44,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:19:44,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:19:44,318 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:44,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:44,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1353166755, now seen corresponding path program 1 times [2021-06-05 03:19:44,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:44,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198920365] [2021-06-05 03:19:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:44,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:19:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198920365] [2021-06-05 03:19:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198920365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:19:44,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122376097] [2021-06-05 03:19:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:19:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:19:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:19:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:44,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122376097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:19:44,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:19:44,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:19:44,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466511927] [2021-06-05 03:19:44,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:19:44,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:19:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:19:44,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:19:44,477 INFO L87 Difference]: Start difference. First operand 556 states and 1680 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-06-05 03:19:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:19:44,535 INFO L93 Difference]: Finished difference Result 643 states and 1752 transitions. [2021-06-05 03:19:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:19:44,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) Word has length 8 [2021-06-05 03:19:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:19:44,542 INFO L225 Difference]: With dead ends: 643 [2021-06-05 03:19:44,543 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 03:19:44,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:19:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 03:19:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 541. [2021-06-05 03:19:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 526 states have (on average 2.946768060836502) internal successors, (1550), 540 states have internal predecessors, (1550), 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) [2021-06-05 03:19:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1550 transitions. [2021-06-05 03:19:44,580 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1550 transitions. Word has length 8 [2021-06-05 03:19:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:19:44,580 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1550 transitions. [2021-06-05 03:19:44,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-06-05 03:19:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1550 transitions. [2021-06-05 03:19:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 03:19:44,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:44,582 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-06-05 03:19:44,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 03:19:44,797 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-06-05 03:19:44,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:44,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048950155] [2021-06-05 03:19:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:44,805 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:44,815 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:44,816 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:19:44,816 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:19:44,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:19:44,817 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 03:19:44,817 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 03:19:44,823 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:19:44,823 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 03:19:44,824 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:19:44,824 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:19:44,824 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:19:44,824 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:19:44,824 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:19:44,824 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:19:44,824 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:19:44,825 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:19:44,825 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-06-05 03:19:44,920 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 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) [2021-06-05 03:19:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 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) [2021-06-05 03:19:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 03:19:44,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:44,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 03:19:44,927 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 99361376, now seen corresponding path program 1 times [2021-06-05 03:19:44,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:44,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362359404] [2021-06-05 03:19:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:44,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:19:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362359404] [2021-06-05 03:19:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362359404] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:19:44,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:19:44,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:19:44,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589373805] [2021-06-05 03:19:44,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:19:44,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:19:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:19:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:44,972 INFO L87 Difference]: Start difference. First operand has 2969 states, 2922 states have (on average 3.893223819301848) internal successors, (11376), 2968 states have internal predecessors, (11376), 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) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:19:45,029 INFO L93 Difference]: Finished difference Result 2935 states and 11240 transitions. [2021-06-05 03:19:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:19:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) Word has length 5 [2021-06-05 03:19:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:19:45,046 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 03:19:45,046 INFO L226 Difference]: Without dead ends: 2902 [2021-06-05 03:19:45,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:19:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-06-05 03:19:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2902. [2021-06-05 03:19:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2861 states have (on average 3.88255854596295) internal successors, (11108), 2901 states have internal predecessors, (11108), 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) [2021-06-05 03:19:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 11108 transitions. [2021-06-05 03:19:45,168 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 11108 transitions. Word has length 5 [2021-06-05 03:19:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:19:45,169 INFO L482 AbstractCegarLoop]: Abstraction has 2902 states and 11108 transitions. [2021-06-05 03:19:45,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-06-05 03:19:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 11108 transitions. [2021-06-05 03:19:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:19:45,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:45,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:19:45,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:19:45,170 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 842086411, now seen corresponding path program 1 times [2021-06-05 03:19:45,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:45,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586873156] [2021-06-05 03:19:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:45,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:19:45,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586873156] [2021-06-05 03:19:45,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586873156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:19:45,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022025163] [2021-06-05 03:19:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:19:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:19:45,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:19:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:19:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:19:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022025163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:19:45,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:19:45,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:19:45,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092656845] [2021-06-05 03:19:45,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:19:45,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:19:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:19:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:19:45,252 INFO L87 Difference]: Start difference. First operand 2902 states and 11108 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-06-05 03:19:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:19:45,338 INFO L93 Difference]: Finished difference Result 4458 states and 15343 transitions. [2021-06-05 03:19:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:19:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) Word has length 8 [2021-06-05 03:19:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:19:45,360 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 03:19:45,360 INFO L226 Difference]: Without dead ends: 4364 [2021-06-05 03:19:45,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:19:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-06-05 03:19:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 3766. [2021-06-05 03:19:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3766 states, 3728 states have (on average 3.6555793991416308) internal successors, (13628), 3765 states have internal predecessors, (13628), 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) [2021-06-05 03:19:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 13628 transitions. [2021-06-05 03:19:45,484 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 13628 transitions. Word has length 8 [2021-06-05 03:19:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:19:45,484 INFO L482 AbstractCegarLoop]: Abstraction has 3766 states and 13628 transitions. [2021-06-05 03:19:45,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-06-05 03:19:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 13628 transitions. [2021-06-05 03:19:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 03:19:45,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:19:45,487 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:19:45,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:19:45,690 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:19:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:19:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash -307903811, now seen corresponding path program 1 times [2021-06-05 03:19:45,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:19:45,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051856570] [2021-06-05 03:19:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:19:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:45,695 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:19:45,706 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:19:45,707 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:19:45,708 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:19:45,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:19:45,710 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 4 thread instances [2021-06-05 03:19:45,720 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:19:45 BasicIcfg [2021-06-05 03:19:45,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:19:45,723 INFO L168 Benchmark]: Toolchain (without parser) took 2247.21 ms. Allocated memory is still 346.0 MB. Free memory was 326.5 MB in the beginning and 223.6 MB in the end (delta: 102.9 MB). Peak memory consumption was 106.8 MB. Max. memory is 16.0 GB. [2021-06-05 03:19:45,724 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 327.5 MB in the beginning and 327.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:19:45,725 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.93 ms. Allocated memory is still 346.0 MB. Free memory was 326.4 MB in the beginning and 324.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 03:19:45,725 INFO L168 Benchmark]: Boogie Preprocessor took 11.70 ms. Allocated memory is still 346.0 MB. Free memory was 324.9 MB in the beginning and 324.0 MB in the end (delta: 916.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:19:45,725 INFO L168 Benchmark]: RCFGBuilder took 171.99 ms. Allocated memory is still 346.0 MB. Free memory was 323.9 MB in the beginning and 315.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 03:19:45,727 INFO L168 Benchmark]: TraceAbstraction took 2026.78 ms. Allocated memory is still 346.0 MB. Free memory was 314.9 MB in the beginning and 223.6 MB in the end (delta: 91.3 MB). Peak memory consumption was 94.2 MB. Max. memory is 16.0 GB. [2021-06-05 03:19:45,733 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 346.0 MB. Free memory was 327.5 MB in the beginning and 327.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.93 ms. Allocated memory is still 346.0 MB. Free memory was 326.4 MB in the beginning and 324.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.70 ms. Allocated memory is still 346.0 MB. Free memory was 324.9 MB in the beginning and 324.0 MB in the end (delta: 916.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 171.99 ms. Allocated memory is still 346.0 MB. Free memory was 323.9 MB in the beginning and 315.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2026.78 ms. Allocated memory is still 346.0 MB. Free memory was 314.9 MB in the beginning and 223.6 MB in the end (delta: 91.3 MB). Peak memory consumption was 94.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 newid := 0; VAL [newid=0] [L18] 0 n := 0; VAL [n=0, newid=0] [L21] FORK 0 fork newid foo(); VAL [n=0, newid=0] [L30] 1 n := n + 1; VAL [n=1, newid=0] [L22] 0 newid := newid + 1; VAL [n=1, newid=1] [L21] FORK 0 fork newid foo(); VAL [n=1, newid=1] [L30] 2 n := n + 1; VAL [n=2, newid=1] [L22] 0 newid := newid + 1; VAL [n=2, newid=2] [L21] FORK 0 fork newid foo(); VAL [n=2, newid=2] [L30] 3 n := n + 1; VAL [n=3, newid=2] [L31] 1 assert n <= 2; VAL [n=3, newid=2] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 213.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.8ms, AutomataDifference: 35.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 9 SDslu, 6 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.8ms SsaConstructionTime, 13.7ms SatisfiabilityAnalysisTime, 42.7ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 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 with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 78.1ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 1.1ms, AutomataDifference: 26.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 13 SDslu, 13 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9ms SsaConstructionTime, 3.9ms SatisfiabilityAnalysisTime, 11.4ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 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 with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 737.1ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 15.3ms, AutomataDifference: 137.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 60 SDslu, 39 SDs, 0 SdLazy, 48 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=594occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 72 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.5ms SsaConstructionTime, 16.2ms SatisfiabilityAnalysisTime, 112.3ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 17 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 883.8ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 10.2ms, AutomataDifference: 191.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 95.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 55 SDslu, 51 SDs, 0 SdLazy, 72 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3766occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 245.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 598 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.4ms SsaConstructionTime, 17.0ms SatisfiabilityAnalysisTime, 53.7ms InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 17 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...