/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:20:43,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:20:43,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:20:43,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:20:43,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:20:43,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:20:43,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:20:43,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:20:43,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:20:43,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:20:43,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:20:43,601 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:20:43,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:20:43,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:20:43,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:20:43,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:20:43,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:20:43,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:20:43,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:20:43,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:20:43,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:20:43,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:20:43,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:20:43,831 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:20:43,832 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:20:43,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl [2021-06-05 03:20:43,845 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Bakery.bpl' [2021-06-05 03:20:43,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:20:43,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:20:43,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:20:43,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:20:43,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:20:43,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:20:43,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:20:43,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:20:43,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:20:43,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... [2021-06-05 03:20:43,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:20:43,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:20:43,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:20:43,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:20:43,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:20:43,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-05 03:20:43,966 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-05 03:20:43,966 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-05 03:20:43,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-05 03:20:43,966 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-05 03:20:43,967 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-05 03:20:43,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:20:43,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:20:43,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:20:43,967 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:20:44,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:20:44,070 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 03:20:44,071 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:20:44 BoogieIcfgContainer [2021-06-05 03:20:44,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:20:44,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:20:44,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:20:44,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:20:44,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:43" (1/2) ... [2021-06-05 03:20:44,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53467266 and model type Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:20:44, skipping insertion in model container [2021-06-05 03:20:44,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:20:44" (2/2) ... [2021-06-05 03:20:44,076 INFO L111 eAbstractionObserver]: Analyzing ICFG Bakery.bpl [2021-06-05 03:20:44,079 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:20:44,079 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:20:44,080 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 03:20:44,080 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:20:44,098 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:20:44,111 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 03:20:44,122 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:20:44,123 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:20:44,123 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:20:44,123 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:20:44,123 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:20:44,123 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:20:44,123 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:20:44,123 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:20:44,129 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 62 flow [2021-06-05 03:20:44,142 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 175 states, 171 states have (on average 2.497076023391813) internal successors, (427), 174 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 171 states have (on average 2.497076023391813) internal successors, (427), 174 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 03:20:44,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,148 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1948731573, now seen corresponding path program 1 times [2021-06-05 03:20:44,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364946653] [2021-06-05 03:20:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364946653] [2021-06-05 03:20:44,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364946653] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:20:44,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428696] [2021-06-05 03:20:44,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:20:44,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:20:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:20:44,267 INFO L87 Difference]: Start difference. First operand has 175 states, 171 states have (on average 2.497076023391813) internal successors, (427), 174 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,325 INFO L93 Difference]: Finished difference Result 204 states and 488 transitions. [2021-06-05 03:20:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:20:44,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-06-05 03:20:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,334 INFO L225 Difference]: With dead ends: 204 [2021-06-05 03:20:44,334 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 03:20:44,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:20:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 03:20:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-06-05 03:20:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 190 states have (on average 2.473684210526316) internal successors, (470), 191 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 470 transitions. [2021-06-05 03:20:44,391 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 470 transitions. Word has length 7 [2021-06-05 03:20:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,391 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 470 transitions. [2021-06-05 03:20:44,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 470 transitions. [2021-06-05 03:20:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 03:20:44,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:20:44,392 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash 281769241, now seen corresponding path program 1 times [2021-06-05 03:20:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294331507] [2021-06-05 03:20:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294331507] [2021-06-05 03:20:44,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294331507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 03:20:44,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291665304] [2021-06-05 03:20:44,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:20:44,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:20:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:20:44,409 INFO L87 Difference]: Start difference. First operand 192 states and 470 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,432 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2021-06-05 03:20:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:20:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 03:20:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,435 INFO L225 Difference]: With dead ends: 216 [2021-06-05 03:20:44,435 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 03:20:44,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:20:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 03:20:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2021-06-05 03:20:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.283582089552239) internal successors, (459), 201 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 459 transitions. [2021-06-05 03:20:44,449 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 459 transitions. Word has length 8 [2021-06-05 03:20:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,449 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 459 transitions. [2021-06-05 03:20:44,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 459 transitions. [2021-06-05 03:20:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:20:44,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:20:44,451 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash 391474269, now seen corresponding path program 1 times [2021-06-05 03:20:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708611549] [2021-06-05 03:20:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708611549] [2021-06-05 03:20:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708611549] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:20:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824274830] [2021-06-05 03:20:44,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:20:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:20:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:20:44,501 INFO L87 Difference]: Start difference. First operand 202 states and 459 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,556 INFO L93 Difference]: Finished difference Result 258 states and 565 transitions. [2021-06-05 03:20:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:20:44,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-06-05 03:20:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,558 INFO L225 Difference]: With dead ends: 258 [2021-06-05 03:20:44,559 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 03:20:44,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:20:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 03:20:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 240. [2021-06-05 03:20:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.2343096234309625) internal successors, (534), 239 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 534 transitions. [2021-06-05 03:20:44,574 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 534 transitions. Word has length 12 [2021-06-05 03:20:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,574 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 534 transitions. [2021-06-05 03:20:44,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 534 transitions. [2021-06-05 03:20:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:20:44,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:20:44,576 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 630687597, now seen corresponding path program 2 times [2021-06-05 03:20:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513639914] [2021-06-05 03:20:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513639914] [2021-06-05 03:20:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513639914] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:20:44,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259457925] [2021-06-05 03:20:44,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:20:44,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:20:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:20:44,627 INFO L87 Difference]: Start difference. First operand 240 states and 534 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,663 INFO L93 Difference]: Finished difference Result 306 states and 665 transitions. [2021-06-05 03:20:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:20:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-06-05 03:20:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,665 INFO L225 Difference]: With dead ends: 306 [2021-06-05 03:20:44,665 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 03:20:44,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:20:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 03:20:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 258. [2021-06-05 03:20:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.252918287937743) internal successors, (579), 257 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 579 transitions. [2021-06-05 03:20:44,692 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 579 transitions. Word has length 12 [2021-06-05 03:20:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,693 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 579 transitions. [2021-06-05 03:20:44,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 579 transitions. [2021-06-05 03:20:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:20:44,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:20:44,697 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash -826400076, now seen corresponding path program 1 times [2021-06-05 03:20:44,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774870107] [2021-06-05 03:20:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774870107] [2021-06-05 03:20:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774870107] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:20:44,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325255522] [2021-06-05 03:20:44,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:20:44,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:20:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:20:44,738 INFO L87 Difference]: Start difference. First operand 258 states and 579 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,772 INFO L93 Difference]: Finished difference Result 202 states and 435 transitions. [2021-06-05 03:20:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:20:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-06-05 03:20:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,774 INFO L225 Difference]: With dead ends: 202 [2021-06-05 03:20:44,774 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 03:20:44,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:20:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 03:20:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2021-06-05 03:20:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 162 states have (on average 2.191358024691358) internal successors, (355), 161 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 355 transitions. [2021-06-05 03:20:44,780 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 355 transitions. Word has length 18 [2021-06-05 03:20:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,780 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 355 transitions. [2021-06-05 03:20:44,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 355 transitions. [2021-06-05 03:20:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:20:44,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:20:44,781 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash 828911154, now seen corresponding path program 2 times [2021-06-05 03:20:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119632324] [2021-06-05 03:20:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119632324] [2021-06-05 03:20:44,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119632324] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:20:44,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255089382] [2021-06-05 03:20:44,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:20:44,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:20:44,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:20:44,808 INFO L87 Difference]: Start difference. First operand 162 states and 355 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,828 INFO L93 Difference]: Finished difference Result 206 states and 435 transitions. [2021-06-05 03:20:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:20:44,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-06-05 03:20:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,829 INFO L225 Difference]: With dead ends: 206 [2021-06-05 03:20:44,829 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 03:20:44,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:20:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 03:20:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2021-06-05 03:20:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.150943396226415) internal successors, (342), 159 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 342 transitions. [2021-06-05 03:20:44,834 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 342 transitions. Word has length 18 [2021-06-05 03:20:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,834 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 342 transitions. [2021-06-05 03:20:44,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 342 transitions. [2021-06-05 03:20:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:20:44,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:44,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:44,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:20:44,835 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1459335517, now seen corresponding path program 1 times [2021-06-05 03:20:44,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:44,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895890584] [2021-06-05 03:20:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:20:44,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:44,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895890584] [2021-06-05 03:20:44,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895890584] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:44,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:44,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 03:20:44,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198670583] [2021-06-05 03:20:44,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:20:44,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:44,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:20:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:20:44,866 INFO L87 Difference]: Start difference. First operand 160 states and 342 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:44,896 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2021-06-05 03:20:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:20:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 24 [2021-06-05 03:20:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:44,896 INFO L225 Difference]: With dead ends: 132 [2021-06-05 03:20:44,896 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 03:20:44,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:20:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 03:20:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 03:20:44,897 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 03:20:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 03:20:44,897 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-05 03:20:44,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:44,897 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 03:20:44,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 03:20:44,897 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 03:20:44,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:20:44,899 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 03:20:44,901 INFO L202 PluginConnector]: Adding new model Bakery.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:20:44 BasicIcfg [2021-06-05 03:20:44,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:20:44,901 INFO L168 Benchmark]: Toolchain (without parser) took 1031.63 ms. Allocated memory is still 339.7 MB. Free memory was 319.6 MB in the beginning and 226.5 MB in the end (delta: 93.1 MB). Peak memory consumption was 94.9 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:44,902 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:20:44,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.65 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:44,902 INFO L168 Benchmark]: Boogie Preprocessor took 11.85 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.1 MB in the end (delta: 950.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:44,903 INFO L168 Benchmark]: RCFGBuilder took 170.24 ms. Allocated memory is still 339.7 MB. Free memory was 317.0 MB in the beginning and 306.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:44,903 INFO L168 Benchmark]: TraceAbstraction took 828.45 ms. Allocated memory is still 339.7 MB. Free memory was 306.3 MB in the beginning and 226.5 MB in the end (delta: 79.8 MB). Peak memory consumption was 80.2 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:44,904 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 0.11 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.65 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.85 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.1 MB in the end (delta: 950.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 170.24 ms. Allocated memory is still 339.7 MB. Free memory was 317.0 MB in the beginning and 306.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 828.45 ms. Allocated memory is still 339.7 MB. Free memory was 306.3 MB in the beginning and 226.5 MB in the end (delta: 79.8 MB). Peak memory consumption was 80.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 38]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 53]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 45 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 776.7ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 11.2ms, AutomataDifference: 290.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 187 SDtfs, 229 SDslu, 227 SDs, 0 SdLazy, 138 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 130.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=258occurred in iteration=4, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 178 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.8ms SsaConstructionTime, 29.0ms SatisfiabilityAnalysisTime, 207.6ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 242 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 13/13 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...