/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example_unnecessary_interleavings.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:13:13,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:13:13,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:13:13,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:13:13,890 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-Separate.epf [2021-06-05 13:13:13,926 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:13:13,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:13:13,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:13:13,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:13:13,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:13:13,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:13:13,927 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:13:13,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:13:13,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:13:13,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:13:13,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:13:13,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:13:13,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:13:13,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:13:13,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:13:13,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:13:13,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:13:13,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:13:13,931 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:13:13,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:13:14,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:13:14,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:13:14,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:13:14,261 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:13:14,263 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:13:14,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_unnecessary_interleavings.bpl [2021-06-05 13:13:14,263 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_unnecessary_interleavings.bpl' [2021-06-05 13:13:14,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:13:14,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:13:14,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:13:14,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:13:14,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:13:14,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:13:14,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:13:14,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:13:14,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:13:14,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/1) ... [2021-06-05 13:13:14,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:13:14,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:13:14,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:13:14,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:13:14,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (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 13:13:14,396 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_y given in one single declaration [2021-06-05 13:13:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure set_y [2021-06-05 13:13:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure set_y [2021-06-05 13:13:14,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_z given in one single declaration [2021-06-05 13:13:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure set_z [2021-06-05 13:13:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure set_z [2021-06-05 13:13:14,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:13:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:13:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:13:14,398 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-05 13:13:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-05 13:13:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-05 13:13:14,399 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 13:13:14,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:13:14,514 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:13:14,515 INFO L202 PluginConnector]: Adding new model example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:13:14 BoogieIcfgContainer [2021-06-05 13:13:14,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:13:14,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:13:14,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:13:14,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:13:14,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:14" (1/2) ... [2021-06-05 13:13:14,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f029029 and model type example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:13:14, skipping insertion in model container [2021-06-05 13:13:14,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:13:14" (2/2) ... [2021-06-05 13:13:14,521 INFO L111 eAbstractionObserver]: Analyzing ICFG example_unnecessary_interleavings.bpl [2021-06-05 13:13:14,525 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:13:14,526 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:13:14,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:13:14,526 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:13:14,572 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-06-05 13:13:14,590 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:13:14,604 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:13:14,605 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:13:14,605 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:13:14,605 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:13:14,605 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:13:14,605 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:13:14,605 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:13:14,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:13:14,612 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 25 transitions, 92 flow [2021-06-05 13:13:14,626 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 81 states, 79 states have (on average 2.2151898734177213) internal successors, (175), 80 states have internal predecessors, (175), 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 13:13:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 2.2151898734177213) internal successors, (175), 80 states have internal predecessors, (175), 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 13:13:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:13:14,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:14,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:14,634 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1195979864, now seen corresponding path program 1 times [2021-06-05 13:13:14,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:14,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856565286] [2021-06-05 13:13:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:14,788 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 13:13:14,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:14,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856565286] [2021-06-05 13:13:14,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856565286] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:14,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:14,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194532592] [2021-06-05 13:13:14,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:14,803 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 2.2151898734177213) internal successors, (175), 80 states have internal predecessors, (175), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 13:13:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:14,821 INFO L93 Difference]: Finished difference Result 66 states and 136 transitions. [2021-06-05 13:13:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-06-05 13:13:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:14,829 INFO L225 Difference]: With dead ends: 66 [2021-06-05 13:13:14,829 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 13:13:14,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 13:13:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-06-05 13:13:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.126984126984127) internal successors, (134), 63 states have internal predecessors, (134), 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 13:13:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 134 transitions. [2021-06-05 13:13:14,859 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 134 transitions. Word has length 14 [2021-06-05 13:13:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:14,860 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 134 transitions. [2021-06-05 13:13:14,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 13:13:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 134 transitions. [2021-06-05 13:13:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:13:14,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:14,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:14,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:13:14,862 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1196010554, now seen corresponding path program 1 times [2021-06-05 13:13:14,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:14,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030685387] [2021-06-05 13:13:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:14,883 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 13:13:14,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:14,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030685387] [2021-06-05 13:13:14,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030685387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:14,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:14,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:14,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605138028] [2021-06-05 13:13:14,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:14,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:14,886 INFO L87 Difference]: Start difference. First operand 64 states and 134 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 13:13:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:14,890 INFO L93 Difference]: Finished difference Result 55 states and 110 transitions. [2021-06-05 13:13:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-06-05 13:13:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:14,892 INFO L225 Difference]: With dead ends: 55 [2021-06-05 13:13:14,892 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 13:13:14,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 13:13:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-06-05 13:13:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 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 13:13:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 110 transitions. [2021-06-05 13:13:14,900 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 110 transitions. Word has length 14 [2021-06-05 13:13:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:14,900 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 110 transitions. [2021-06-05 13:13:14,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 13:13:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 110 transitions. [2021-06-05 13:13:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:13:14,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:14,901 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:14,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:13:14,901 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:14,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1196039384, now seen corresponding path program 1 times [2021-06-05 13:13:14,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:14,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341630352] [2021-06-05 13:13:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:14,925 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 13:13:14,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341630352] [2021-06-05 13:13:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341630352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:14,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:14,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 13:13:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195299565] [2021-06-05 13:13:14,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:14,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:14,928 INFO L87 Difference]: Start difference. First operand 55 states and 110 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 13:13:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:14,930 INFO L93 Difference]: Finished difference Result 54 states and 109 transitions. [2021-06-05 13:13:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-06-05 13:13:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:14,931 INFO L225 Difference]: With dead ends: 54 [2021-06-05 13:13:14,931 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:13:14,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:13:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:13:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 13:13:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:13:14,932 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-06-05 13:13:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:14,932 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:13:14,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 13:13:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:13:14,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:13:14,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:13:14,934 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:13:14,936 INFO L202 PluginConnector]: Adding new model example_unnecessary_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:13:14 BasicIcfg [2021-06-05 13:13:14,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:13:14,938 INFO L168 Benchmark]: Toolchain (without parser) took 641.45 ms. Allocated memory is still 381.7 MB. Free memory was 360.6 MB in the beginning and 343.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:14,938 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 381.7 MB. Free memory is still 361.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:13:14,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.63 ms. Allocated memory is still 381.7 MB. Free memory was 360.6 MB in the beginning and 359.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:13:14,939 INFO L168 Benchmark]: Boogie Preprocessor took 9.64 ms. Allocated memory is still 381.7 MB. Free memory was 359.1 MB in the beginning and 358.2 MB in the end (delta: 865.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:14,940 INFO L168 Benchmark]: RCFGBuilder took 186.46 ms. Allocated memory is still 381.7 MB. Free memory was 358.2 MB in the beginning and 349.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:14,941 INFO L168 Benchmark]: TraceAbstraction took 420.27 ms. Allocated memory is still 381.7 MB. Free memory was 348.8 MB in the beginning and 343.5 MB in the end (delta: 5.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:14,943 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 381.7 MB. Free memory is still 361.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.63 ms. Allocated memory is still 381.7 MB. Free memory was 360.6 MB in the beginning and 359.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.64 ms. Allocated memory is still 381.7 MB. Free memory was 359.1 MB in the beginning and 358.2 MB in the end (delta: 865.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 186.46 ms. Allocated memory is still 381.7 MB. Free memory was 358.2 MB in the beginning and 349.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 420.27 ms. Allocated memory is still 381.7 MB. Free memory was 348.8 MB in the beginning and 343.5 MB in the end (delta: 5.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 330.8ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 8.9ms, AutomataDifference: 47.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 18 SDslu, 11 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred 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: 26.8ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.1ms SsaConstructionTime, 19.3ms SatisfiabilityAnalysisTime, 89.3ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 83 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...