/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/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:37:58,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:37:58,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:37:58,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:37:58,675 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 03:37:58,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:37:58,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:37:58,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:37:58,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:37:58,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:37:58,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:37:58,706 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:37:58,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:37:58,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:37:58,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:37:58,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:37:58,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:37:58,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:37:58,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:37:58,709 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:37:58,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:37:58,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:37:58,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:37:58,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:37:58,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:37:58,966 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:37:58,967 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:37:58,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2021-06-05 03:37:58,967 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2021-06-05 03:37:58,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:37:58,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:37:58,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:37:58,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:37:58,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:37:59,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:37:59,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:37:59,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:37:59,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:37:59,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/1) ... [2021-06-05 03:37:59,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:37:59,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:37:59,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:37:59,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:37:59,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (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 03:37:59,125 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-05 03:37:59,126 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-05 03:37:59,126 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-05 03:37:59,126 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-05 03:37:59,126 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-05 03:37:59,126 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-05 03:37:59,126 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:37:59,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:37:59,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:37:59,127 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 03:37:59,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:37:59,229 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:37:59,231 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:37:59 BoogieIcfgContainer [2021-06-05 03:37:59,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:37:59,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:37:59,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:37:59,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:37:59,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:37:58" (1/2) ... [2021-06-05 03:37:59,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bef368 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:37:59, skipping insertion in model container [2021-06-05 03:37:59,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:37:59" (2/2) ... [2021-06-05 03:37:59,237 INFO L111 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2021-06-05 03:37:59,241 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:37:59,241 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:37:59,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:37:59,242 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:37:59,290 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 03:37:59,305 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:37:59,329 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:37:59,329 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:37:59,329 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:37:59,329 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:37:59,329 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:37:59,329 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:37:59,329 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:37:59,330 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:37:59,338 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 52 flow [2021-06-05 03:37:59,349 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 03:37:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 03:37:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 03:37:59,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:37:59,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:37:59,355 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:37:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:37:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1311335226, now seen corresponding path program 1 times [2021-06-05 03:37:59,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:37:59,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256833412] [2021-06-05 03:37:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:37:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:37:59,553 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 03:37:59,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:37:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256833412] [2021-06-05 03:37:59,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256833412] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:37:59,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:37:59,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:37:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397721539] [2021-06-05 03:37:59,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:37:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:37:59,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:37:59,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:37:59,583 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 03:37:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:37:59,642 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-06-05 03:37:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:37:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-06-05 03:37:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:37:59,648 INFO L225 Difference]: With dead ends: 32 [2021-06-05 03:37:59,648 INFO L226 Difference]: Without dead ends: 16 [2021-06-05 03:37:59,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:37:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-05 03:37:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-05 03:37:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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 03:37:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-06-05 03:37:59,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2021-06-05 03:37:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:37:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-06-05 03:37:59,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 03:37:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-06-05 03:37:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 03:37:59,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:37:59,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:37:59,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:37:59,675 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:37:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:37:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 275369828, now seen corresponding path program 2 times [2021-06-05 03:37:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:37:59,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880687029] [2021-06-05 03:37:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:37:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:37:59,730 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 03:37:59,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:37:59,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880687029] [2021-06-05 03:37:59,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880687029] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:37:59,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:37:59,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:37:59,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525313005] [2021-06-05 03:37:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:37:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:37:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:37:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:37:59,734 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 03:37:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:37:59,744 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2021-06-05 03:37:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:37:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-06-05 03:37:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:37:59,744 INFO L225 Difference]: With dead ends: 15 [2021-06-05 03:37:59,744 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 03:37:59,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:37:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 03:37:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 03:37:59,745 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 03:37:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 03:37:59,745 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-06-05 03:37:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:37:59,745 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 03:37:59,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 03:37:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 03:37:59,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 03:37:59,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:37:59,747 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 03:37:59,748 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:37:59 BasicIcfg [2021-06-05 03:37:59,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:37:59,749 INFO L168 Benchmark]: Toolchain (without parser) took 751.59 ms. Allocated memory is still 392.2 MB. Free memory was 371.9 MB in the beginning and 354.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.0 GB. [2021-06-05 03:37:59,749 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 392.2 MB. Free memory was 372.9 MB in the beginning and 372.8 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:37:59,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.02 ms. Allocated memory is still 392.2 MB. Free memory was 371.8 MB in the beginning and 370.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:37:59,750 INFO L168 Benchmark]: Boogie Preprocessor took 9.40 ms. Allocated memory is still 392.2 MB. Free memory was 370.4 MB in the beginning and 369.5 MB in the end (delta: 852.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 03:37:59,751 INFO L168 Benchmark]: RCFGBuilder took 201.87 ms. Allocated memory is still 392.2 MB. Free memory was 369.5 MB in the beginning and 361.3 MB in the end (delta: 8.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-06-05 03:37:59,751 INFO L168 Benchmark]: TraceAbstraction took 515.82 ms. Allocated memory is still 392.2 MB. Free memory was 360.8 MB in the beginning and 354.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. [2021-06-05 03:37:59,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 392.2 MB. Free memory was 372.9 MB in the beginning and 372.8 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.02 ms. Allocated memory is still 392.2 MB. Free memory was 371.8 MB in the beginning and 370.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.40 ms. Allocated memory is still 392.2 MB. Free memory was 370.4 MB in the beginning and 369.5 MB in the end (delta: 852.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 201.87 ms. Allocated memory is still 392.2 MB. Free memory was 369.5 MB in the beginning and 361.3 MB in the end (delta: 8.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 515.82 ms. Allocated memory is still 392.2 MB. Free memory was 360.8 MB in the beginning and 354.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 418.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.9ms, AutomataDifference: 103.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 28 SDslu, 22 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.0ms SsaConstructionTime, 21.0ms SatisfiabilityAnalysisTime, 152.5ms InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 110 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...