/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-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 21:01:30,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 21:01:30,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 21:01:30,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 21:01:31,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 21:01:31,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 21:01:31,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 21:01:31,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 21:01:31,025 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 21:01:31,026 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 21:01:31,026 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 21:01:31,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 21:01:31,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 21:01:31,027 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 21:01:31,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 21:01:31,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 21:01:31,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 21:01:31,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 21:01:31,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 21:01:31,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 21:01:31,029 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 21:01:31,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 21:01:31,030 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 21:01:31,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 21:01:31,031 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 21:01:31,031 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 21:01:31,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 21:01:31,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 21:01:31,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 21:01:31,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 21:01:31,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 21:01:31,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 21:01:31,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 21:01:31,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 21:01:31,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 21:01:31,035 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 21:01:31,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 21:01:31,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 21:01:31,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 21:01:31,385 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 21:01:31,385 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 21:01:31,387 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-26 21:01:32,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 21:01:32,945 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 21:01:32,945 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-26 21:01:32,969 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072f971eb/8d94a4aef33e4954a094296a77d7b9fc/FLAG3451295d3 [2023-08-26 21:01:32,988 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072f971eb/8d94a4aef33e4954a094296a77d7b9fc [2023-08-26 21:01:32,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 21:01:33,002 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 21:01:33,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 21:01:33,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 21:01:33,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 21:01:33,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:01:32" (1/1) ... [2023-08-26 21:01:33,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488bb183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33, skipping insertion in model container [2023-08-26 21:01:33,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:01:32" (1/1) ... [2023-08-26 21:01:33,059 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 21:01:33,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 21:01:33,349 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 21:01:33,382 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-26 21:01:33,384 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-26 21:01:33,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 21:01:33,445 INFO L206 MainTranslator]: Completed translation [2023-08-26 21:01:33,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33 WrapperNode [2023-08-26 21:01:33,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 21:01:33,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 21:01:33,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 21:01:33,450 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 21:01:33,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,498 INFO L138 Inliner]: procedures = 167, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2023-08-26 21:01:33,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 21:01:33,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 21:01:33,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 21:01:33,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 21:01:33,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 21:01:33,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 21:01:33,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 21:01:33,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 21:01:33,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (1/1) ... [2023-08-26 21:01:33,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 21:01:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 21:01:33,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 21:01:33,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 21:01:33,609 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 21:01:33,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 21:01:33,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 21:01:33,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 21:01:33,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 21:01:33,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 21:01:33,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 21:01:33,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 21:01:33,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 21:01:33,612 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 21:01:33,751 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 21:01:33,753 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 21:01:33,965 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 21:01:33,971 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 21:01:33,972 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 21:01:33,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:01:33 BoogieIcfgContainer [2023-08-26 21:01:33,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 21:01:33,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 21:01:33,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 21:01:33,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 21:01:33,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:01:32" (1/3) ... [2023-08-26 21:01:33,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33320343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:01:33, skipping insertion in model container [2023-08-26 21:01:33,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:33" (2/3) ... [2023-08-26 21:01:33,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33320343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:01:33, skipping insertion in model container [2023-08-26 21:01:33,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:01:33" (3/3) ... [2023-08-26 21:01:33,982 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-08-26 21:01:33,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 21:01:34,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 21:01:34,000 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 21:01:34,082 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:34,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 87 transitions, 179 flow [2023-08-26 21:01:34,157 INFO L124 PetriNetUnfolderBase]: 11/97 cut-off events. [2023-08-26 21:01:34,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:34,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 97 events. 11/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-26 21:01:34,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 87 transitions, 179 flow [2023-08-26 21:01:34,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 87 transitions, 179 flow [2023-08-26 21:01:34,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:34,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 87 transitions, 179 flow [2023-08-26 21:01:34,181 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 87 transitions, 179 flow [2023-08-26 21:01:34,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 87 transitions, 179 flow [2023-08-26 21:01:34,215 INFO L124 PetriNetUnfolderBase]: 11/97 cut-off events. [2023-08-26 21:01:34,215 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:34,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 97 events. 11/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-26 21:01:34,218 INFO L119 LiptonReduction]: Number of co-enabled transitions 1638 [2023-08-26 21:01:36,410 INFO L134 LiptonReduction]: Checked pairs total: 1431 [2023-08-26 21:01:36,411 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-26 21:01:36,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:36,428 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@c5373ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:36,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-26 21:01:36,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:36,431 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-26 21:01:36,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:36,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:36,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:01:36,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err8ASSERT_VIOLATIONASSERT, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-26 21:01:36,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash 374817033, now seen corresponding path program 1 times [2023-08-26 21:01:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:36,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421662378] [2023-08-26 21:01:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:36,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:36,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421662378] [2023-08-26 21:01:36,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421662378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:36,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:36,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 21:01:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647609141] [2023-08-26 21:01:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:36,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:36,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 169 [2023-08-26 21:01:36,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-08-26 21:01:36,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:36,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 169 [2023-08-26 21:01:36,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:36,776 INFO L124 PetriNetUnfolderBase]: 67/143 cut-off events. [2023-08-26 21:01:36,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:36,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 143 events. 67/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 518 event pairs, 28 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 276. Up to 88 conditions per place. [2023-08-26 21:01:36,779 INFO L140 encePairwiseOnDemand]: 160/169 looper letters, 34 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-26 21:01:36,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 37 transitions, 151 flow [2023-08-26 21:01:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-26 21:01:36,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-26 21:01:36,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-26 21:01:36,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-26 21:01:36,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:36,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-26 21:01:36,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2023-08-26 21:01:36,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2023-08-26 21:01:36,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2023-08-26 21:01:36,812 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 55 flow. Second operand 3 states and 234 transitions. [2023-08-26 21:01:36,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 37 transitions, 151 flow [2023-08-26 21:01:36,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 37 transitions, 151 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 21:01:36,817 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 71 flow [2023-08-26 21:01:36,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-08-26 21:01:36,823 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-26 21:01:36,824 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 71 flow [2023-08-26 21:01:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-08-26 21:01:36,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:36,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 21:01:36,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 21:01:36,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err8ASSERT_VIOLATIONASSERT, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-26 21:01:36,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1265620175, now seen corresponding path program 1 times [2023-08-26 21:01:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:36,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25889484] [2023-08-26 21:01:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:36,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:36,870 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:36,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:36,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2023-08-26 21:01:36,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 19 remaining) [2023-08-26 21:01:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 19 remaining) [2023-08-26 21:01:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONASSERT (15 of 19 remaining) [2023-08-26 21:01:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 19 remaining) [2023-08-26 21:01:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 19 remaining) [2023-08-26 21:01:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 19 remaining) [2023-08-26 21:01:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 19 remaining) [2023-08-26 21:01:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 19 remaining) [2023-08-26 21:01:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 19 remaining) [2023-08-26 21:01:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 19 remaining) [2023-08-26 21:01:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 19 remaining) [2023-08-26 21:01:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONASSERT (6 of 19 remaining) [2023-08-26 21:01:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 19 remaining) [2023-08-26 21:01:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 19 remaining) [2023-08-26 21:01:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 19 remaining) [2023-08-26 21:01:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 19 remaining) [2023-08-26 21:01:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 19 remaining) [2023-08-26 21:01:36,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 19 remaining) [2023-08-26 21:01:36,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 21:01:36,877 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:36,880 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:36,880 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 21:01:36,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:36,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 314 flow [2023-08-26 21:01:36,988 INFO L124 PetriNetUnfolderBase]: 21/173 cut-off events. [2023-08-26 21:01:36,989 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:36,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 173 events. 21/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 436 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2023-08-26 21:01:36,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 151 transitions, 314 flow [2023-08-26 21:01:36,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 151 transitions, 314 flow [2023-08-26 21:01:36,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:36,997 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 151 transitions, 314 flow [2023-08-26 21:01:36,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 151 transitions, 314 flow [2023-08-26 21:01:36,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 314 flow [2023-08-26 21:01:37,029 INFO L124 PetriNetUnfolderBase]: 21/173 cut-off events. [2023-08-26 21:01:37,030 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:37,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 173 events. 21/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 436 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2023-08-26 21:01:37,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 11340 [2023-08-26 21:01:40,196 INFO L134 LiptonReduction]: Checked pairs total: 9431 [2023-08-26 21:01:40,196 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-26 21:01:40,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:40,199 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@c5373ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:40,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-08-26 21:01:40,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:40,201 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-26 21:01:40,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:40,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:40,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:01:40,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err8ASSERT_VIOLATIONASSERT, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-26 21:01:40,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash 722059046, now seen corresponding path program 1 times [2023-08-26 21:01:40,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:40,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682604996] [2023-08-26 21:01:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:40,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:40,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:40,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682604996] [2023-08-26 21:01:40,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682604996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:40,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:40,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 21:01:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909103365] [2023-08-26 21:01:40,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:40,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:40,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:40,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 299 [2023-08-26 21:01:40,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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) [2023-08-26 21:01:40,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:40,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 299 [2023-08-26 21:01:40,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:40,484 INFO L124 PetriNetUnfolderBase]: 1465/2243 cut-off events. [2023-08-26 21:01:40,484 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-26 21:01:40,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4560 conditions, 2243 events. 1465/2243 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 13361 event pairs, 644 based on Foata normal form. 0/940 useless extension candidates. Maximal degree in co-relation 2450. Up to 1375 conditions per place. [2023-08-26 21:01:40,499 INFO L140 encePairwiseOnDemand]: 289/299 looper letters, 70 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-26 21:01:40,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 75 transitions, 311 flow [2023-08-26 21:01:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 21:01:40,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938684503901895 [2023-08-26 21:01:40,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 21:01:40,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 21:01:40,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:40,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 21:01:40,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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) [2023-08-26 21:01:40,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 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) [2023-08-26 21:01:40,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 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) [2023-08-26 21:01:40,508 INFO L175 Difference]: Start difference. First operand has 41 places, 46 transitions, 104 flow. Second operand 3 states and 443 transitions. [2023-08-26 21:01:40,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 75 transitions, 311 flow [2023-08-26 21:01:40,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 75 transitions, 309 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 21:01:40,511 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 116 flow [2023-08-26 21:01:40,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-26 21:01:40,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-26 21:01:40,512 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 116 flow [2023-08-26 21:01:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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) [2023-08-26 21:01:40,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:40,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 21:01:40,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 21:01:40,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err8ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err8ASSERT_VIOLATIONASSERT, thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-26 21:01:40,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:40,514 INFO L85 PathProgramCache]: Analyzing trace with hash 908996622, now seen corresponding path program 1 times [2023-08-26 21:01:40,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:40,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339721204] [2023-08-26 21:01:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:40,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:40,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:40,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:40,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:40,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err8ASSERT_VIOLATIONASSERT (27 of 28 remaining) [2023-08-26 21:01:40,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 28 remaining) [2023-08-26 21:01:40,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 28 remaining) [2023-08-26 21:01:40,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONASSERT (24 of 28 remaining) [2023-08-26 21:01:40,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 28 remaining) [2023-08-26 21:01:40,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 28 remaining) [2023-08-26 21:01:40,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 28 remaining) [2023-08-26 21:01:40,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONASSERT (14 of 28 remaining) [2023-08-26 21:01:40,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 28 remaining) [2023-08-26 21:01:40,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 28 remaining) [2023-08-26 21:01:40,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 28 remaining) [2023-08-26 21:01:40,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 28 remaining) [2023-08-26 21:01:40,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 28 remaining) [2023-08-26 21:01:40,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 28 remaining) [2023-08-26 21:01:40,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 28 remaining) [2023-08-26 21:01:40,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 28 remaining) [2023-08-26 21:01:40,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 28 remaining) [2023-08-26 21:01:40,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 28 remaining) [2023-08-26 21:01:40,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 28 remaining) [2023-08-26 21:01:40,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 28 remaining) [2023-08-26 21:01:40,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 28 remaining) [2023-08-26 21:01:40,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 28 remaining) [2023-08-26 21:01:40,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 21:01:40,565 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:40,569 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-26 21:01:40,569 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 21:01:40,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:01:40 BasicIcfg [2023-08-26 21:01:40,598 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 21:01:40,599 INFO L158 Benchmark]: Toolchain (without parser) took 7597.19ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 343.9MB in the beginning and 227.3MB in the end (delta: 116.6MB). Peak memory consumption was 193.8MB. Max. memory is 16.0GB. [2023-08-26 21:01:40,599 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 369.1MB. Free memory was 347.1MB in the beginning and 347.0MB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 21:01:40,601 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.77ms. Allocated memory is still 369.1MB. Free memory was 343.3MB in the beginning and 324.3MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 21:01:40,601 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.82ms. Allocated memory is still 369.1MB. Free memory was 324.3MB in the beginning and 322.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 21:01:40,604 INFO L158 Benchmark]: Boogie Preprocessor took 36.72ms. Allocated memory is still 369.1MB. Free memory was 322.4MB in the beginning and 320.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 21:01:40,605 INFO L158 Benchmark]: RCFGBuilder took 436.96ms. Allocated memory is still 369.1MB. Free memory was 320.9MB in the beginning and 306.8MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 21:01:40,605 INFO L158 Benchmark]: TraceAbstraction took 6621.49ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 305.6MB in the beginning and 227.3MB in the end (delta: 78.3MB). Peak memory consumption was 156.0MB. Max. memory is 16.0GB. [2023-08-26 21:01:40,607 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 369.1MB. Free memory was 347.1MB in the beginning and 347.0MB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 442.77ms. Allocated memory is still 369.1MB. Free memory was 343.3MB in the beginning and 324.3MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.82ms. Allocated memory is still 369.1MB. Free memory was 324.3MB in the beginning and 322.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.72ms. Allocated memory is still 369.1MB. Free memory was 322.4MB in the beginning and 320.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 436.96ms. Allocated memory is still 369.1MB. Free memory was 320.9MB in the beginning and 306.8MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 6621.49ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 305.6MB in the beginning and 227.3MB in the end (delta: 78.3MB). Peak memory consumption was 156.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 80 PlacesBefore, 23 PlacesAfterwards, 87 TransitionsBefore, 25 TransitionsAfterwards, 1638 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 57 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 82 TotalNumberOfCompositions, 1431 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1431, independent: 1431, independent conditional: 0, independent unconditional: 1431, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 807, independent: 807, independent conditional: 0, independent unconditional: 807, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1431, independent: 624, independent conditional: 0, independent unconditional: 624, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 807, unknown conditional: 0, unknown unconditional: 807] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 137 PlacesBefore, 41 PlacesAfterwards, 151 TransitionsBefore, 46 TransitionsAfterwards, 11340 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 105 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 9 ChoiceCompositions, 148 TotalNumberOfCompositions, 9431 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9431, independent: 9431, independent conditional: 0, independent unconditional: 9431, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5593, independent: 5593, independent conditional: 0, independent unconditional: 5593, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9431, independent: 3838, independent conditional: 0, independent unconditional: 3838, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 5593, unknown conditional: 0, unknown unconditional: 5593] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 57, Positive conditional cache size: 0, Positive unconditional cache size: 57, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 12]: assertion can be violated assertion can be violated We found a FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i