/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_interleaving.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:13:09,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:13:09,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:13:09,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:13:09,846 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 13:13:09,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:13:09,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:13:09,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:13:09,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:13:09,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:13:09,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:13:09,884 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:13:09,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:13:09,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:13:09,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:13:09,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:13:09,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:13:09,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:13:09,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:13:09,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:13:09,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:13:09,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:13:09,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:13:09,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:13:09,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:13:09,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:13:09,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:13:09,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:13:09,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:13:09,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:13:09,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:13:09,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:13:09,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:13:09,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:13:09,889 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:13:09,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:13:09,889 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:13:09,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:13:10,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:13:10,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:13:10,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:13:10,223 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:13:10,224 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:13:10,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving.bpl [2021-06-05 13:13:10,225 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving.bpl' [2021-06-05 13:13:10,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:13:10,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:13:10,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:13:10,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:13:10,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:13:10,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:13:10,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:13:10,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:13:10,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:13:10,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/1) ... [2021-06-05 13:13:10,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:13:10,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:13:10,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:13:10,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:13:10,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (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 13:13:10,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_y given in one single declaration [2021-06-05 13:13:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure set_y [2021-06-05 13:13:10,355 INFO L138 BoogieDeclarations]: Found implementation of procedure set_y [2021-06-05 13:13:10,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_z given in one single declaration [2021-06-05 13:13:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure set_z [2021-06-05 13:13:10,355 INFO L138 BoogieDeclarations]: Found implementation of procedure set_z [2021-06-05 13:13:10,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:13:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:13:10,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:13:10,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-05 13:13:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-05 13:13:10,355 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-05 13:13:10,356 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 13:13:10,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:13:10,481 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:13:10,483 INFO L202 PluginConnector]: Adding new model example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:13:10 BoogieIcfgContainer [2021-06-05 13:13:10,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:13:10,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:13:10,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:13:10,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:13:10,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:10" (1/2) ... [2021-06-05 13:13:10,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43462a94 and model type example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:13:10, skipping insertion in model container [2021-06-05 13:13:10,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:13:10" (2/2) ... [2021-06-05 13:13:10,492 INFO L111 eAbstractionObserver]: Analyzing ICFG example_interleaving.bpl [2021-06-05 13:13:10,501 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:13:10,502 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:13:10,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:13:10,503 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:13:10,572 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-06-05 13:13:10,592 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:13:10,619 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:13:10,619 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:13:10,619 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:13:10,619 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:13:10,619 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:13:10,619 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:13:10,619 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:13:10,619 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:13:10,631 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 24 transitions, 90 flow [2021-06-05 13:13:10,670 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 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 13:13:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 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 13:13:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:10,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:10,682 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:10,682 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash -921991568, now seen corresponding path program 1 times [2021-06-05 13:13:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:10,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79759546] [2021-06-05 13:13:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:10,867 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 13:13:10,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79759546] [2021-06-05 13:13:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79759546] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:10,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690911005] [2021-06-05 13:13:10,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:10,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:10,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:10,884 INFO L87 Difference]: Start difference. First operand has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 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 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13:13:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:10,902 INFO L93 Difference]: Finished difference Result 65 states and 135 transitions. [2021-06-05 13:13:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:10,909 INFO L225 Difference]: With dead ends: 65 [2021-06-05 13:13:10,910 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 13:13:10,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 13:13:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-06-05 13:13:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 62 states have internal predecessors, (133), 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 13:13:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 133 transitions. [2021-06-05 13:13:10,941 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 133 transitions. Word has length 13 [2021-06-05 13:13:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:10,941 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 133 transitions. [2021-06-05 13:13:10,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13:13:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 133 transitions. [2021-06-05 13:13:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:10,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:10,942 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:10,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:13:10,943 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash -922453778, now seen corresponding path program 1 times [2021-06-05 13:13:10,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:10,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975120349] [2021-06-05 13:13:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:11,069 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 13:13:11,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:11,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975120349] [2021-06-05 13:13:11,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975120349] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:11,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:11,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:11,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625445768] [2021-06-05 13:13:11,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:13:11,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:13:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:11,073 INFO L87 Difference]: Start difference. First operand 63 states and 133 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,118 INFO L93 Difference]: Finished difference Result 108 states and 215 transitions. [2021-06-05 13:13:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:13:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:11,120 INFO L225 Difference]: With dead ends: 108 [2021-06-05 13:13:11,120 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 13:13:11,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 13:13:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-06-05 13:13:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 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 13:13:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-06-05 13:13:11,132 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 13 [2021-06-05 13:13:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:11,132 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-06-05 13:13:11,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-06-05 13:13:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:11,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:11,134 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:11,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:13:11,134 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 674715694, now seen corresponding path program 2 times [2021-06-05 13:13:11,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:11,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208769910] [2021-06-05 13:13:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:11,213 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 13:13:11,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:11,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208769910] [2021-06-05 13:13:11,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208769910] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:11,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:11,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673762779] [2021-06-05 13:13:11,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:13:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:13:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:11,221 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,261 INFO L93 Difference]: Finished difference Result 115 states and 228 transitions. [2021-06-05 13:13:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:13:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:11,263 INFO L225 Difference]: With dead ends: 115 [2021-06-05 13:13:11,263 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 13:13:11,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 13:13:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2021-06-05 13:13:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 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 13:13:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2021-06-05 13:13:11,273 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 13 [2021-06-05 13:13:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:11,273 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2021-06-05 13:13:11,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2021-06-05 13:13:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:11,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:11,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:11,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:13:11,274 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1447175342, now seen corresponding path program 3 times [2021-06-05 13:13:11,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:11,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316192127] [2021-06-05 13:13:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:11,344 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 13:13:11,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:11,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316192127] [2021-06-05 13:13:11,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316192127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:11,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:11,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690379451] [2021-06-05 13:13:11,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:13:11,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:11,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:13:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:11,347 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,423 INFO L93 Difference]: Finished difference Result 95 states and 183 transitions. [2021-06-05 13:13:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:13:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:11,425 INFO L225 Difference]: With dead ends: 95 [2021-06-05 13:13:11,425 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 13:13:11,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 13:13:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-06-05 13:13:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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 13:13:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 99 transitions. [2021-06-05 13:13:11,432 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 99 transitions. Word has length 13 [2021-06-05 13:13:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:11,433 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 99 transitions. [2021-06-05 13:13:11,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 99 transitions. [2021-06-05 13:13:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:11,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:11,434 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:11,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:13:11,434 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:11,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1989043108, now seen corresponding path program 4 times [2021-06-05 13:13:11,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:11,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356475243] [2021-06-05 13:13:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:11,537 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 13:13:11,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356475243] [2021-06-05 13:13:11,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356475243] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:11,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:11,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:11,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104902085] [2021-06-05 13:13:11,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:13:11,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:13:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:11,540 INFO L87 Difference]: Start difference. First operand 50 states and 99 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,575 INFO L93 Difference]: Finished difference Result 75 states and 146 transitions. [2021-06-05 13:13:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:13:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:11,576 INFO L225 Difference]: With dead ends: 75 [2021-06-05 13:13:11,576 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 13:13:11,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 13:13:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-06-05 13:13:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 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 13:13:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-05 13:13:11,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 13 [2021-06-05 13:13:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:11,585 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-05 13:13:11,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-05 13:13:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:11,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:11,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:11,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:13:11,586 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash 828020994, now seen corresponding path program 5 times [2021-06-05 13:13:11,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:11,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222908370] [2021-06-05 13:13:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:11,652 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 13:13:11,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:11,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222908370] [2021-06-05 13:13:11,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222908370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:11,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:11,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835255774] [2021-06-05 13:13:11,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:13:11,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:11,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:13:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:11,655 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,673 INFO L93 Difference]: Finished difference Result 67 states and 129 transitions. [2021-06-05 13:13:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:13:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:11,674 INFO L225 Difference]: With dead ends: 67 [2021-06-05 13:13:11,674 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 13:13:11,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 13:13:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-06-05 13:13:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 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 13:13:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 79 transitions. [2021-06-05 13:13:11,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 79 transitions. Word has length 13 [2021-06-05 13:13:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:11,679 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 79 transitions. [2021-06-05 13:13:11,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 79 transitions. [2021-06-05 13:13:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:13:11,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:11,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:11,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:13:11,680 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1122234652, now seen corresponding path program 6 times [2021-06-05 13:13:11,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:11,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437963680] [2021-06-05 13:13:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:11,747 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 13:13:11,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437963680] [2021-06-05 13:13:11,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437963680] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:11,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:11,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745663017] [2021-06-05 13:13:11,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:13:11,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:13:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:11,749 INFO L87 Difference]: Start difference. First operand 42 states and 79 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,770 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-06-05 13:13:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:13:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-06-05 13:13:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:11,770 INFO L225 Difference]: With dead ends: 41 [2021-06-05 13:13:11,770 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:13:11,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:13:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:13:11,771 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 13:13:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:13:11,771 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-06-05 13:13:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:11,771 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:13:11,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13:13:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:13:11,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:13:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:13:11,773 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:13:11,775 INFO L202 PluginConnector]: Adding new model example_interleaving.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:13:11 BasicIcfg [2021-06-05 13:13:11,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:13:11,776 INFO L168 Benchmark]: Toolchain (without parser) took 1522.72 ms. Allocated memory is still 325.1 MB. Free memory was 304.7 MB in the beginning and 216.3 MB in the end (delta: 88.4 MB). Peak memory consumption was 90.9 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:11,777 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 325.1 MB. Free memory was 305.7 MB in the beginning and 305.6 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:13:11,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.72 ms. Allocated memory is still 325.1 MB. Free memory was 304.7 MB in the beginning and 303.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:11,778 INFO L168 Benchmark]: Boogie Preprocessor took 9.24 ms. Allocated memory is still 325.1 MB. Free memory was 303.2 MB in the beginning and 302.3 MB in the end (delta: 836.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:11,778 INFO L168 Benchmark]: RCFGBuilder took 192.31 ms. Allocated memory is still 325.1 MB. Free memory was 302.3 MB in the beginning and 293.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:11,779 INFO L168 Benchmark]: TraceAbstraction took 1290.44 ms. Allocated memory is still 325.1 MB. Free memory was 292.8 MB in the beginning and 216.3 MB in the end (delta: 76.6 MB). Peak memory consumption was 78.3 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:11,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 325.1 MB. Free memory was 305.7 MB in the beginning and 305.6 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.72 ms. Allocated memory is still 325.1 MB. Free memory was 304.7 MB in the beginning and 303.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.24 ms. Allocated memory is still 325.1 MB. Free memory was 303.2 MB in the beginning and 302.3 MB in the end (delta: 836.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 192.31 ms. Allocated memory is still 325.1 MB. Free memory was 302.3 MB in the beginning and 293.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1290.44 ms. Allocated memory is still 325.1 MB. Free memory was 292.8 MB in the beginning and 216.3 MB in the end (delta: 76.6 MB). Peak memory consumption was 78.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 31 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1155.9ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 14.7ms, AutomataDifference: 294.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 185 SDtfs, 189 SDslu, 221 SDs, 0 SdLazy, 47 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 73.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 301.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.8ms SsaConstructionTime, 35.6ms SatisfiabilityAnalysisTime, 554.1ms InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 838 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...