/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-Sleep-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example1.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 07:32:22,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 07:32:22,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 07:32:22,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-12 07:32:22,502 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-Sleep-NoLbe-Delay.epf [2021-03-12 07:32:22,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 07:32:22,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 07:32:22,520 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-12 07:32:22,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-12 07:32:22,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 07:32:22,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 07:32:22,521 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 07:32:22,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 07:32:22,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 07:32:22,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 07:32:22,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 07:32:22,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 07:32:22,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 07:32:22,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 07:32:22,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 07:32:22,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 07:32:22,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 07:32:22,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 07:32:22,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 07:32:22,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 07:32:22,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 07:32:22,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 07:32:22,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 07:32:22,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-12 07:32:22,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-03-12 07:32:22,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-12 07:32:22,525 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-03-12 07:32:22,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 07:32:22,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 07:32:22,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 07:32:22,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 07:32:22,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 07:32:22,818 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 07:32:22,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example1.bpl [2021-03-12 07:32:22,819 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example1.bpl' [2021-03-12 07:32:22,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 07:32:22,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 07:32:22,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 07:32:22,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 07:32:22,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 07:32:22,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 07:32:22,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 07:32:22,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 07:32:22,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 07:32:22,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/1) ... [2021-03-12 07:32:22,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 07:32:22,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 07:32:22,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 07:32:22,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 07:32:22,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (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 [2021-03-12 07:32:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-12 07:32:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-12 07:32:22,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 07:32:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 07:32:22,984 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 07:32:23,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 07:32:23,102 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 07:32:23,104 INFO L202 PluginConnector]: Adding new model example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 07:32:23 BoogieIcfgContainer [2021-03-12 07:32:23,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 07:32:23,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 07:32:23,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 07:32:23,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 07:32:23,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 07:32:22" (1/2) ... [2021-03-12 07:32:23,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65296636 and model type example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 07:32:23, skipping insertion in model container [2021-03-12 07:32:23,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 07:32:23" (2/2) ... [2021-03-12 07:32:23,133 INFO L111 eAbstractionObserver]: Analyzing ICFG example1.bpl [2021-03-12 07:32:23,141 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-12 07:32:23,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 07:32:23,146 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 07:32:23,147 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 07:32:23,180 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-12 07:32:23,195 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 [2021-03-12 07:32:23,235 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 07:32:23,236 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-12 07:32:23,236 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 07:32:23,237 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 07:32:23,237 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 07:32:23,238 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 07:32:23,238 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 07:32:23,238 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 07:32:23,280 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 07:32:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 07:32:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1124934997, now seen corresponding path program 1 times [2021-03-12 07:32:23,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 07:32:23,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352720969] [2021-03-12 07:32:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 07:32:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-12 07:32:23,350 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-12 07:32:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-12 07:32:23,355 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-12 07:32:23,367 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-12 07:32:23,367 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-12 07:32:23,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 07:32:23,381 INFO L202 PluginConnector]: Adding new model example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.03 07:32:23 BasicIcfg [2021-03-12 07:32:23,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-12 07:32:23,382 INFO L168 Benchmark]: Toolchain (without parser) took 526.06 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 226.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.0 GB. [2021-03-12 07:32:23,383 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-12 07:32:23,383 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.19 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-12 07:32:23,384 INFO L168 Benchmark]: Boogie Preprocessor took 12.85 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 825.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-12 07:32:23,385 INFO L168 Benchmark]: RCFGBuilder took 199.37 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 226.2 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-03-12 07:32:23,385 INFO L168 Benchmark]: TraceAbstraction took 274.25 ms. Allocated memory is still 255.9 MB. Free memory was 225.7 MB in the beginning and 226.6 MB in the end (delta: -942.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 16.0 GB. [2021-03-12 07:32:23,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.19 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.85 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 825.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 199.37 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 226.2 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 274.25 ms. Allocated memory is still 255.9 MB. Free memory was 225.7 MB in the beginning and 226.6 MB in the end (delta: -942.0 kB). Peak memory consumption was 1.0 MB. 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: 16, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 16, negative conditional: 0, negative unconditional: 16, 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: 164.4ms, OverallIterations: 1, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 32.1ms, 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: 2.4ms SsaConstructionTime, 12.1ms 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...