/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-POR-NewStatesSleep-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example1.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 07:30:13,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 07:30:13,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 07:30:13,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 07:30:13,447 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-POR-NewStatesSleep-NoLbe.epf [2021-04-15 07:30:13,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 07:30:13,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 07:30:13,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 07:30:13,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 07:30:13,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 07:30:13,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 07:30:13,491 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 07:30:13,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 07:30:13,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 07:30:13,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 07:30:13,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 07:30:13,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 07:30:13,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 07:30:13,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 07:30:13,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 07:30:13,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 07:30:13,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 07:30:13,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 07:30:13,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 07:30:13,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 07:30:13,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 07:30:13,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 07:30:13,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 07:30:13,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 07:30:13,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 07:30:13,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 07:30:13,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 07:30:13,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 07:30:13,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 07:30:13,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 07:30:13,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-04-15 07:30:13,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 07:30:13,496 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2021-04-15 07:30:13,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 07:30:13,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 07:30:13,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 07:30:13,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 07:30:13,865 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 07:30:13,866 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 07:30:13,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example1.bpl [2021-04-15 07:30:13,867 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example1.bpl' [2021-04-15 07:30:13,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 07:30:13,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 07:30:13,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 07:30:13,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 07:30:13,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 07:30:13,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 07:30:13,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 07:30:13,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 07:30:13,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 07:30:13,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/1) ... [2021-04-15 07:30:13,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 07:30:13,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 07:30:13,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 07:30:13,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 07:30:13,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (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 [2021-04-15 07:30:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-04-15 07:30:14,032 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-04-15 07:30:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 07:30:14,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 07:30:14,033 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 07:30:14,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 07:30:14,151 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 07:30:14,153 INFO L202 PluginConnector]: Adding new model example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 07:30:14 BoogieIcfgContainer [2021-04-15 07:30:14,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 07:30:14,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 07:30:14,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 07:30:14,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 07:30:14,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 07:30:13" (1/2) ... [2021-04-15 07:30:14,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730ed72b and model type example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 07:30:14, skipping insertion in model container [2021-04-15 07:30:14,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 07:30:14" (2/2) ... [2021-04-15 07:30:14,162 INFO L111 eAbstractionObserver]: Analyzing ICFG example1.bpl [2021-04-15 07:30:14,171 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 07:30:14,172 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 07:30:14,204 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 07:30:14,205 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 07:30:14,234 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-04-15 07:30:14,249 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-04-15 07:30:14,295 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 07:30:14,296 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 07:30:14,296 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 07:30:14,296 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 07:30:14,296 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 07:30:14,296 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 07:30:14,296 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 07:30:14,296 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 07:30:14,338 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 07:30:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 07:30:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1124934997, now seen corresponding path program 1 times [2021-04-15 07:30:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 07:30:14,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558489643] [2021-04-15 07:30:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 07:30:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 07:30:14,429 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 07:30:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 07:30:14,447 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 07:30:14,463 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-15 07:30:14,464 INFO L652 BasicCegarLoop]: Counterexample might be feasible [2021-04-15 07:30:14,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 07:30:14,491 INFO L202 PluginConnector]: Adding new model example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 07:30:14 BasicIcfg [2021-04-15 07:30:14,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 07:30:14,494 INFO L168 Benchmark]: Toolchain (without parser) took 593.10 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 226.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.0 GB. [2021-04-15 07:30:14,495 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 168.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 07:30:14,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.29 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 07:30:14,497 INFO L168 Benchmark]: Boogie Preprocessor took 19.25 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 771.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 07:30:14,498 INFO L168 Benchmark]: RCFGBuilder took 199.53 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 226.5 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-04-15 07:30:14,499 INFO L168 Benchmark]: TraceAbstraction took 336.71 ms. Allocated memory is still 255.9 MB. Free memory was 226.2 MB in the beginning and 226.9 MB in the end (delta: -769.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 07:30:14,505 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 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 168.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.29 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.25 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 771.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 199.53 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 226.5 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 336.71 ms. Allocated memory is still 255.9 MB. Free memory was 226.2 MB in the beginning and 226.9 MB in the end (delta: -769.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 1, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 1, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 19, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 ], Maximal queried relation: 0, Independence queries for same thread: 0 - CounterExampleResult [Line: 26]: assertion can be violated assertion can be violated We found a FailurePath: [L20] 0 x := 1; VAL [x=1] [L21] FORK 0 fork 1 foo(); VAL [x=1] [L22] 0 n := 2; VAL [n=2, x=1] [L34] 1 n := 1; VAL [n=1, x=1] [L24] JOIN 1 join x; VAL [n=1, x=1] [L25] 0 x := 4; VAL [n=1, x=4] [L26] 0 assert false; VAL [n=1, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 210.7ms, OverallIterations: 1, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 32.4ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.5ms SsaConstructionTime, 19.7ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...