/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/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:15:31,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:15:31,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:15:31,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:15:31,855 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 05:15:31,887 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:15:31,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:15:31,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:15:31,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:15:31,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:15:31,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:15:31,890 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:15:31,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:15:31,890 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:15:31,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:15:31,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:15:31,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:15:31,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:15:31,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:15:31,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:15:31,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:15:31,893 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:15:31,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:15:31,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:15:32,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:15:32,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:15:32,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:15:32,189 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:15:32,191 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:15:32,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl [2021-06-05 05:15:32,192 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl' [2021-06-05 05:15:32,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:15:32,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:15:32,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:15:32,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:15:32,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:15:32,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:15:32,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:15:32,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:15:32,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:15:32,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/1) ... [2021-06-05 05:15:32,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:15:32,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:15:32,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:15:32,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:15:32,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (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 05:15:32,350 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:15:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:15:32,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:15:32,351 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:15:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:15:32,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:15:32,351 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:15:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:15:32,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:15:32,352 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 05:15:32,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:15:32,542 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:15:32,543 INFO L202 PluginConnector]: Adding new model ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:15:32 BoogieIcfgContainer [2021-06-05 05:15:32,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:15:32,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:15:32,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:15:32,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:15:32,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:15:32" (1/2) ... [2021-06-05 05:15:32,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6b5cc0 and model type ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:15:32, skipping insertion in model container [2021-06-05 05:15:32,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:15:32" (2/2) ... [2021-06-05 05:15:32,557 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-2.wvr.bpl [2021-06-05 05:15:32,562 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:15:32,562 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:15:32,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:15:32,564 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:15:32,625 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:15:32,658 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:15:32,673 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:15:32,673 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:15:32,673 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:15:32,673 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:15:32,673 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:15:32,673 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:15:32,673 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:15:32,673 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:15:32,680 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 60 flow [2021-06-05 05:15:32,691 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 62 states, 60 states have (on average 1.7) internal successors, (102), 61 states have internal predecessors, (102), 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 05:15:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7) internal successors, (102), 61 states have internal predecessors, (102), 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 05:15:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:15:32,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:32,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:32,708 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1519237959, now seen corresponding path program 1 times [2021-06-05 05:15:32,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:32,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338501361] [2021-06-05 05:15:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:32,945 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 05:15:32,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338501361] [2021-06-05 05:15:32,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338501361] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:15:32,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:15:32,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:15:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523445385] [2021-06-05 05:15:32,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:15:32,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:32,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:15:32,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:15:32,971 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7) internal successors, (102), 61 states have internal predecessors, (102), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:33,025 INFO L93 Difference]: Finished difference Result 76 states and 123 transitions. [2021-06-05 05:15:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:15:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:33,037 INFO L225 Difference]: With dead ends: 76 [2021-06-05 05:15:33,037 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 05:15:33,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:15:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 05:15:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 05:15:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 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 05:15:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2021-06-05 05:15:33,073 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 18 [2021-06-05 05:15:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:33,073 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2021-06-05 05:15:33,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2021-06-05 05:15:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:15:33,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:33,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:33,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:15:33,076 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -803227735, now seen corresponding path program 2 times [2021-06-05 05:15:33,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:33,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378575386] [2021-06-05 05:15:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:33,135 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 05:15:33,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:33,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378575386] [2021-06-05 05:15:33,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378575386] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:15:33,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:15:33,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:15:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913191868] [2021-06-05 05:15:33,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:15:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:15:33,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:15:33,139 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:33,181 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-06-05 05:15:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:15:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:33,183 INFO L225 Difference]: With dead ends: 38 [2021-06-05 05:15:33,184 INFO L226 Difference]: Without dead ends: 34 [2021-06-05 05:15:33,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:15:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-06-05 05:15:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-06-05 05:15:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 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 05:15:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2021-06-05 05:15:33,192 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 18 [2021-06-05 05:15:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:33,192 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2021-06-05 05:15:33,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2021-06-05 05:15:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:15:33,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:33,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:33,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:15:33,193 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:33,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1488100875, now seen corresponding path program 3 times [2021-06-05 05:15:33,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:33,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250007471] [2021-06-05 05:15:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:33,237 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 05:15:33,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:33,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250007471] [2021-06-05 05:15:33,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250007471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:15:33,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:15:33,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:15:33,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348355055] [2021-06-05 05:15:33,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:15:33,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:33,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:15:33,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:15:33,240 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:33,258 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2021-06-05 05:15:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:15:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:33,259 INFO L225 Difference]: With dead ends: 13 [2021-06-05 05:15:33,259 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 05:15:33,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:15:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 05:15:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 05:15:33,260 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 05:15:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 05:15:33,261 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-06-05 05:15:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:33,261 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 05:15:33,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 05:15:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 05:15:33,261 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 05:15:33,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:15:33,263 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:15:33,265 INFO L202 PluginConnector]: Adding new model ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:15:33 BasicIcfg [2021-06-05 05:15:33,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:15:33,266 INFO L168 Benchmark]: Toolchain (without parser) took 1007.26 ms. Allocated memory is still 354.4 MB. Free memory was 334.0 MB in the beginning and 301.1 MB in the end (delta: 32.9 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:33,267 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 354.4 MB. Free memory was 335.1 MB in the beginning and 335.0 MB in the end (delta: 126.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:15:33,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.93 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:33,268 INFO L168 Benchmark]: Boogie Preprocessor took 11.99 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.6 MB in the end (delta: 861.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:15:33,269 INFO L168 Benchmark]: RCFGBuilder took 248.13 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 320.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:33,269 INFO L168 Benchmark]: TraceAbstraction took 720.82 ms. Allocated memory is still 354.4 MB. Free memory was 319.9 MB in the beginning and 301.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:33,271 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 0.15 ms. Allocated memory is still 354.4 MB. Free memory was 335.1 MB in the beginning and 335.0 MB in the end (delta: 126.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.93 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.99 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.6 MB in the end (delta: 861.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 248.13 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 320.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 720.82 ms. Allocated memory is still 354.4 MB. Free memory was 319.9 MB in the beginning and 301.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: 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, 38 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 591.4ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 9.7ms, AutomataDifference: 154.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 27 SDslu, 67 SDs, 0 SdLazy, 54 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.4ms SsaConstructionTime, 54.6ms SatisfiabilityAnalysisTime, 188.4ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 130 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...