/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:10:26,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:10:26,196 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:10:26,200 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:10:26,201 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:10:26,201 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:10:26,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:10:26,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:10:26,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:10:26,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:10:26,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:10:26,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:10:26,242 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:10:26,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:10:26,243 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:10:26,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:10:26,244 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:10:26,244 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:10:26,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:10:26,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:10:26,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:10:26,245 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:10:26,245 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:10:26,245 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:10:26,246 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:10:26,246 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:10:26,246 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:10:26,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:10:26,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:10:26,247 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:10:26,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:10:26,247 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:10:26,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:10:26,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:10:26,248 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:10:26,249 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:10:26,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:10:26,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:10:26,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:10:26,497 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:10:26,498 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:10:26,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c [2023-08-04 03:10:27,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:10:27,773 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:10:27,773 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c [2023-08-04 03:10:27,782 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16db4b7f0/035d864c16c04d58b096de9090abe55b/FLAG75543365c [2023-08-04 03:10:27,802 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16db4b7f0/035d864c16c04d58b096de9090abe55b [2023-08-04 03:10:27,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:10:27,809 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:10:27,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:10:27,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:10:27,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:10:27,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:10:27" (1/1) ... [2023-08-04 03:10:27,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4281269b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:27, skipping insertion in model container [2023-08-04 03:10:27,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:10:27" (1/1) ... [2023-08-04 03:10:27,841 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:10:28,012 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c[2841,2854] [2023-08-04 03:10:28,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:10:28,026 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:10:28,049 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c[2841,2854] [2023-08-04 03:10:28,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:10:28,064 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:10:28,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28 WrapperNode [2023-08-04 03:10:28,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:10:28,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:10:28,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:10:28,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:10:28,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,105 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 248 [2023-08-04 03:10:28,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:10:28,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:10:28,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:10:28,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:10:28,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:10:28,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:10:28,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:10:28,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:10:28,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (1/1) ... [2023-08-04 03:10:28,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:10:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:10:28,179 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) [2023-08-04 03:10:28,199 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 [2023-08-04 03:10:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:10:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:10:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:10:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:10:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:10:28,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:10:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:10:28,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:10:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:10:28,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:10:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:10:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:10:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:10:28,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:10:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:10:28,235 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:10:28,363 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:10:28,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:10:28,795 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:10:28,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:10:28,807 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-08-04 03:10:28,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:10:28 BoogieIcfgContainer [2023-08-04 03:10:28,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:10:28,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:10:28,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:10:28,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:10:28,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:10:27" (1/3) ... [2023-08-04 03:10:28,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1304435d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:10:28, skipping insertion in model container [2023-08-04 03:10:28,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:10:28" (2/3) ... [2023-08-04 03:10:28,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1304435d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:10:28, skipping insertion in model container [2023-08-04 03:10:28,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:10:28" (3/3) ... [2023-08-04 03:10:28,816 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-vector-add.wvr_bound2.c [2023-08-04 03:10:28,824 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:10:28,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:10:28,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:10:28,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:10:28,914 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:10:28,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 03:10:29,248 INFO L124 PetriNetUnfolderBase]: 121/902 cut-off events. [2023-08-04 03:10:29,248 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:10:29,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 902 events. 121/902 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4238 event pairs, 0 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2023-08-04 03:10:29,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 03:10:29,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 320 transitions, 682 flow [2023-08-04 03:10:29,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:10:29,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 320 transitions, 682 flow [2023-08-04 03:10:29,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 320 transitions, 682 flow [2023-08-04 03:10:29,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 03:10:29,399 INFO L124 PetriNetUnfolderBase]: 121/902 cut-off events. [2023-08-04 03:10:29,400 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:10:29,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 902 events. 121/902 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4238 event pairs, 0 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2023-08-04 03:10:29,419 INFO L119 LiptonReduction]: Number of co-enabled transitions 8820 [2023-08-04 03:10:37,035 INFO L134 LiptonReduction]: Checked pairs total: 18870 [2023-08-04 03:10:37,036 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-04 03:10:37,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:10:37,053 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=true, 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;@25926873, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:10:37,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:10:37,059 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:10:37,060 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-08-04 03:10:37,060 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:10:37,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:10:37,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:10:37,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:10:37,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:10:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1065139918, now seen corresponding path program 1 times [2023-08-04 03:10:37,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:10:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361838058] [2023-08-04 03:10:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:10:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:10:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:10:37,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:10:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:10:37,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:10:37,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:10:37,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:10:37,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:10:37,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:10:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:10:37,358 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:10:37,363 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:10:37,364 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:10:37,364 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:10:37,397 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:10:37,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 03:10:38,302 INFO L124 PetriNetUnfolderBase]: 967/5251 cut-off events. [2023-08-04 03:10:38,302 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:10:38,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 5251 events. 967/5251 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 44451 event pairs, 22 based on Foata normal form. 0/4528 useless extension candidates. Maximal degree in co-relation 3084. Up to 192 conditions per place. [2023-08-04 03:10:38,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 03:10:38,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 374 transitions, 838 flow [2023-08-04 03:10:38,379 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:10:38,379 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 374 transitions, 838 flow [2023-08-04 03:10:38,384 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 374 transitions, 838 flow [2023-08-04 03:10:38,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 03:10:39,081 INFO L124 PetriNetUnfolderBase]: 967/5251 cut-off events. [2023-08-04 03:10:39,081 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:10:39,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 5251 events. 967/5251 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 44451 event pairs, 22 based on Foata normal form. 0/4528 useless extension candidates. Maximal degree in co-relation 3084. Up to 192 conditions per place. [2023-08-04 03:10:39,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 22932 [2023-08-04 03:10:46,200 INFO L134 LiptonReduction]: Checked pairs total: 59975 [2023-08-04 03:10:46,201 INFO L136 LiptonReduction]: Total number of compositions: 335 [2023-08-04 03:10:46,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:10:46,211 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=true, 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;@25926873, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:10:46,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:10:46,221 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:10:46,221 INFO L124 PetriNetUnfolderBase]: 20/141 cut-off events. [2023-08-04 03:10:46,221 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:10:46,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:10:46,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:10:46,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:10:46,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:10:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash 592674374, now seen corresponding path program 1 times [2023-08-04 03:10:46,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:10:46,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506467395] [2023-08-04 03:10:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:10:46,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:10:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:10:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:10:46,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:10:46,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506467395] [2023-08-04 03:10:46,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506467395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:10:46,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918145536] [2023-08-04 03:10:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:10:46,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:10:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:10:46,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:10:46,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:10:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:10:46,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:10:46,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:10:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:10:46,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:10:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918145536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:10:46,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:10:46,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:10:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156105855] [2023-08-04 03:10:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:10:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:10:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:10:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:10:46,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:10:46,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 709 [2023-08-04 03:10:46,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 319.4) internal successors, (1597), 5 states have internal predecessors, (1597), 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) [2023-08-04 03:10:46,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:10:46,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 709 [2023-08-04 03:10:46,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:12:36,126 INFO L124 PetriNetUnfolderBase]: 1253745/1517868 cut-off events. [2023-08-04 03:12:36,127 INFO L125 PetriNetUnfolderBase]: For 120696/120696 co-relation queries the response was YES. [2023-08-04 03:12:42,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3038651 conditions, 1517868 events. 1253745/1517868 cut-off events. For 120696/120696 co-relation queries the response was YES. Maximal size of possible extension queue 29898. Compared 8844632 event pairs, 509400 based on Foata normal form. 0/976357 useless extension candidates. Maximal degree in co-relation 1078048. Up to 1456897 conditions per place. [2023-08-04 03:12:44,670 INFO L140 encePairwiseOnDemand]: 703/709 looper letters, 49 selfloop transitions, 5 changer transitions 33/104 dead transitions. [2023-08-04 03:12:44,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 462 flow [2023-08-04 03:12:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:12:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:12:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1672 transitions. [2023-08-04 03:12:44,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47165021156558534 [2023-08-04 03:12:44,713 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1672 transitions. [2023-08-04 03:12:44,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1672 transitions. [2023-08-04 03:12:44,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:12:44,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1672 transitions. [2023-08-04 03:12:44,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 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) [2023-08-04 03:12:44,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 709.0) internal successors, (4254), 6 states have internal predecessors, (4254), 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) [2023-08-04 03:12:44,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 709.0) internal successors, (4254), 6 states have internal predecessors, (4254), 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) [2023-08-04 03:12:44,762 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 278 flow. Second operand 5 states and 1672 transitions. [2023-08-04 03:12:44,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 462 flow [2023-08-04 03:12:44,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:12:44,936 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 169 flow [2023-08-04 03:12:44,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2023-08-04 03:12:44,955 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2023-08-04 03:12:44,956 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 169 flow [2023-08-04 03:12:44,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 319.4) internal successors, (1597), 5 states have internal predecessors, (1597), 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) [2023-08-04 03:12:44,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:12:44,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:12:44,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:12:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:12:45,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:12:45,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:12:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2132171401, now seen corresponding path program 1 times [2023-08-04 03:12:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:12:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794974921] [2023-08-04 03:12:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:12:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:12:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:12:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:12:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:12:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794974921] [2023-08-04 03:12:45,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794974921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:12:45,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:12:45,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:12:45,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203552507] [2023-08-04 03:12:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:12:45,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:12:45,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:12:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:12:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:12:45,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 709 [2023-08-04 03:12:45,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 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) [2023-08-04 03:12:45,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:12:45,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 709 [2023-08-04 03:12:45,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:12:58,858 INFO L124 PetriNetUnfolderBase]: 164903/200545 cut-off events. [2023-08-04 03:12:58,858 INFO L125 PetriNetUnfolderBase]: For 5261/5261 co-relation queries the response was YES. [2023-08-04 03:12:59,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399435 conditions, 200545 events. 164903/200545 cut-off events. For 5261/5261 co-relation queries the response was YES. Maximal size of possible extension queue 4258. Compared 966756 event pairs, 82639 based on Foata normal form. 1/131678 useless extension candidates. Maximal degree in co-relation 170373. Up to 191464 conditions per place. [2023-08-04 03:13:00,150 INFO L140 encePairwiseOnDemand]: 706/709 looper letters, 45 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 03:13:00,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 268 flow [2023-08-04 03:13:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:13:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:13:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1001 transitions. [2023-08-04 03:13:00,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706158909261871 [2023-08-04 03:13:00,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1001 transitions. [2023-08-04 03:13:00,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1001 transitions. [2023-08-04 03:13:00,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:13:00,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1001 transitions. [2023-08-04 03:13:00,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 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) [2023-08-04 03:13:00,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 709.0) internal successors, (2836), 4 states have internal predecessors, (2836), 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) [2023-08-04 03:13:00,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 709.0) internal successors, (2836), 4 states have internal predecessors, (2836), 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) [2023-08-04 03:13:00,161 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 169 flow. Second operand 3 states and 1001 transitions. [2023-08-04 03:13:00,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 268 flow [2023-08-04 03:13:00,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 263 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:13:00,168 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 163 flow [2023-08-04 03:13:00,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-04 03:13:00,169 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2023-08-04 03:13:00,169 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 163 flow [2023-08-04 03:13:00,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 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) [2023-08-04 03:13:00,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:13:00,170 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:00,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:13:00,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:13:00,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:13:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -28352149, now seen corresponding path program 1 times [2023-08-04 03:13:00,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:13:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656255581] [2023-08-04 03:13:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:13:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:13:00,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:13:00,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656255581] [2023-08-04 03:13:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656255581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:13:00,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808531513] [2023-08-04 03:13:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:00,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:13:00,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:13:00,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:13:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:00,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:13:00,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:13:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:13:00,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:13:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:13:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808531513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:13:00,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:13:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:13:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445082143] [2023-08-04 03:13:00,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:13:00,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:13:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:13:00,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:13:00,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:13:00,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 709 [2023-08-04 03:13:00,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 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) [2023-08-04 03:13:00,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:13:00,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 709 [2023-08-04 03:13:00,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:13:09,227 INFO L124 PetriNetUnfolderBase]: 137241/165763 cut-off events. [2023-08-04 03:13:09,227 INFO L125 PetriNetUnfolderBase]: For 3739/3739 co-relation queries the response was YES. [2023-08-04 03:13:09,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329735 conditions, 165763 events. 137241/165763 cut-off events. For 3739/3739 co-relation queries the response was YES. Maximal size of possible extension queue 3594. Compared 765642 event pairs, 52046 based on Foata normal form. 4/108547 useless extension candidates. Maximal degree in co-relation 170157. Up to 158446 conditions per place. [2023-08-04 03:13:10,249 INFO L140 encePairwiseOnDemand]: 706/709 looper letters, 49 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-04 03:13:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 284 flow [2023-08-04 03:13:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:13:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:13:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1321 transitions. [2023-08-04 03:13:10,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657968970380818 [2023-08-04 03:13:10,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1321 transitions. [2023-08-04 03:13:10,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1321 transitions. [2023-08-04 03:13:10,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:13:10,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1321 transitions. [2023-08-04 03:13:10,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 330.25) internal successors, (1321), 4 states have internal predecessors, (1321), 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) [2023-08-04 03:13:10,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 709.0) internal successors, (3545), 5 states have internal predecessors, (3545), 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) [2023-08-04 03:13:10,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 709.0) internal successors, (3545), 5 states have internal predecessors, (3545), 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) [2023-08-04 03:13:10,263 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 163 flow. Second operand 4 states and 1321 transitions. [2023-08-04 03:13:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 284 flow [2023-08-04 03:13:10,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:13:10,266 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 160 flow [2023-08-04 03:13:10,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-04 03:13:10,267 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -12 predicate places. [2023-08-04 03:13:10,267 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 160 flow [2023-08-04 03:13:10,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 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) [2023-08-04 03:13:10,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:13:10,268 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:10,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:13:10,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 03:13:10,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:13:10,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:13:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2078535916, now seen corresponding path program 1 times [2023-08-04 03:13:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:13:10,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309892741] [2023-08-04 03:13:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:13:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:13:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:13:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309892741] [2023-08-04 03:13:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309892741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:13:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626255002] [2023-08-04 03:13:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:13:10,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:13:10,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:13:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:10,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:13:10,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:13:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:13:10,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:13:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626255002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:13:10,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:13:10,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:13:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218247504] [2023-08-04 03:13:10,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:13:10,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:13:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:13:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:13:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:13:10,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 709 [2023-08-04 03:13:10,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 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) [2023-08-04 03:13:10,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:13:10,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 709 [2023-08-04 03:13:10,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:13:19,367 INFO L124 PetriNetUnfolderBase]: 131541/158775 cut-off events. [2023-08-04 03:13:19,368 INFO L125 PetriNetUnfolderBase]: For 2547/2547 co-relation queries the response was YES. [2023-08-04 03:13:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316577 conditions, 158775 events. 131541/158775 cut-off events. For 2547/2547 co-relation queries the response was YES. Maximal size of possible extension queue 3508. Compared 739903 event pairs, 23042 based on Foata normal form. 0/104117 useless extension candidates. Maximal degree in co-relation 86761. Up to 149856 conditions per place. [2023-08-04 03:13:20,309 INFO L140 encePairwiseOnDemand]: 705/709 looper letters, 68 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-08-04 03:13:20,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 364 flow [2023-08-04 03:13:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:13:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:13:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1658 transitions. [2023-08-04 03:13:20,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770098730606485 [2023-08-04 03:13:20,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1658 transitions. [2023-08-04 03:13:20,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1658 transitions. [2023-08-04 03:13:20,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:13:20,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1658 transitions. [2023-08-04 03:13:20,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 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) [2023-08-04 03:13:20,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 709.0) internal successors, (4254), 6 states have internal predecessors, (4254), 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) [2023-08-04 03:13:20,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 709.0) internal successors, (4254), 6 states have internal predecessors, (4254), 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) [2023-08-04 03:13:20,325 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 160 flow. Second operand 5 states and 1658 transitions. [2023-08-04 03:13:20,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 364 flow [2023-08-04 03:13:20,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 357 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:13:20,329 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 172 flow [2023-08-04 03:13:20,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-04 03:13:20,331 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -12 predicate places. [2023-08-04 03:13:20,331 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 172 flow [2023-08-04 03:13:20,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 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) [2023-08-04 03:13:20,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:13:20,332 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:20,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:13:20,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:20,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:13:20,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:13:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1224295327, now seen corresponding path program 1 times [2023-08-04 03:13:20,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:13:20,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642890953] [2023-08-04 03:13:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:20,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:13:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:13:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:13:20,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642890953] [2023-08-04 03:13:20,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642890953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:13:20,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:13:20,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:13:20,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602641316] [2023-08-04 03:13:20,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:13:20,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:13:20,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:13:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:13:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:13:20,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 709 [2023-08-04 03:13:20,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 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) [2023-08-04 03:13:20,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:13:20,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 709 [2023-08-04 03:13:20,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:13:29,006 INFO L124 PetriNetUnfolderBase]: 125893/152807 cut-off events. [2023-08-04 03:13:29,006 INFO L125 PetriNetUnfolderBase]: For 2977/2977 co-relation queries the response was YES. [2023-08-04 03:13:29,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304369 conditions, 152807 events. 125893/152807 cut-off events. For 2977/2977 co-relation queries the response was YES. Maximal size of possible extension queue 3611. Compared 725586 event pairs, 63690 based on Foata normal form. 16/100580 useless extension candidates. Maximal degree in co-relation 83290. Up to 144875 conditions per place. [2023-08-04 03:13:29,962 INFO L140 encePairwiseOnDemand]: 706/709 looper letters, 52 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-04 03:13:29,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 297 flow [2023-08-04 03:13:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:13:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:13:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2023-08-04 03:13:29,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47343676539727314 [2023-08-04 03:13:29,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2023-08-04 03:13:29,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2023-08-04 03:13:29,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:13:29,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2023-08-04 03:13:29,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 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) [2023-08-04 03:13:29,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 709.0) internal successors, (2836), 4 states have internal predecessors, (2836), 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) [2023-08-04 03:13:29,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 709.0) internal successors, (2836), 4 states have internal predecessors, (2836), 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) [2023-08-04 03:13:29,972 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 172 flow. Second operand 3 states and 1007 transitions. [2023-08-04 03:13:29,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 297 flow [2023-08-04 03:13:29,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 70 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:13:29,977 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 170 flow [2023-08-04 03:13:29,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-04 03:13:29,981 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -11 predicate places. [2023-08-04 03:13:29,981 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 170 flow [2023-08-04 03:13:29,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 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) [2023-08-04 03:13:29,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:13:29,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:29,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:13:29,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:13:29,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:13:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash 930714163, now seen corresponding path program 1 times [2023-08-04 03:13:29,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:13:29,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772760411] [2023-08-04 03:13:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:29,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:13:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:13:30,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:13:30,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772760411] [2023-08-04 03:13:30,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772760411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:13:30,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423577341] [2023-08-04 03:13:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:30,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:30,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:13:30,042 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:13:30,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:13:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:30,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:13:30,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:13:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:13:30,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:13:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:13:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423577341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:13:30,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:13:30,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:13:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784218202] [2023-08-04 03:13:30,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:13:30,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:13:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:13:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:13:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:13:30,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 709 [2023-08-04 03:13:30,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 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) [2023-08-04 03:13:30,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:13:30,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 709 [2023-08-04 03:13:30,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:13:37,287 INFO L124 PetriNetUnfolderBase]: 104997/126663 cut-off events. [2023-08-04 03:13:37,287 INFO L125 PetriNetUnfolderBase]: For 2561/2561 co-relation queries the response was YES. [2023-08-04 03:13:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252529 conditions, 126663 events. 104997/126663 cut-off events. For 2561/2561 co-relation queries the response was YES. Maximal size of possible extension queue 3324. Compared 580801 event pairs, 40642 based on Foata normal form. 64/83252 useless extension candidates. Maximal degree in co-relation 68938. Up to 118595 conditions per place. [2023-08-04 03:13:38,092 INFO L140 encePairwiseOnDemand]: 706/709 looper letters, 62 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-04 03:13:38,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 81 transitions, 341 flow [2023-08-04 03:13:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:13:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:13:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1333 transitions. [2023-08-04 03:13:38,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47002820874471085 [2023-08-04 03:13:38,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1333 transitions. [2023-08-04 03:13:38,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1333 transitions. [2023-08-04 03:13:38,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:13:38,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1333 transitions. [2023-08-04 03:13:38,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 333.25) internal successors, (1333), 4 states have internal predecessors, (1333), 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) [2023-08-04 03:13:38,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 709.0) internal successors, (3545), 5 states have internal predecessors, (3545), 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) [2023-08-04 03:13:38,103 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 709.0) internal successors, (3545), 5 states have internal predecessors, (3545), 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) [2023-08-04 03:13:38,103 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 170 flow. Second operand 4 states and 1333 transitions. [2023-08-04 03:13:38,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 81 transitions, 341 flow [2023-08-04 03:13:38,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:13:38,108 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 167 flow [2023-08-04 03:13:38,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-08-04 03:13:38,108 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2023-08-04 03:13:38,109 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 167 flow [2023-08-04 03:13:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 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) [2023-08-04 03:13:38,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:13:38,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:38,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:13:38,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:38,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:13:38,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:13:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 455491686, now seen corresponding path program 1 times [2023-08-04 03:13:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:13:38,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549126297] [2023-08-04 03:13:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:38,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:13:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:13:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:13:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549126297] [2023-08-04 03:13:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549126297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:13:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435123603] [2023-08-04 03:13:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:13:38,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:13:38,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:13:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:38,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:13:38,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:13:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:13:38,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:13:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435123603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:13:38,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:13:38,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:13:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709316552] [2023-08-04 03:13:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:13:38,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:13:38,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:13:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:13:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:13:38,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 709 [2023-08-04 03:13:38,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 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) [2023-08-04 03:13:38,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:13:38,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 709 [2023-08-04 03:13:38,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:13:43,217 INFO L124 PetriNetUnfolderBase]: 74277/89095 cut-off events. [2023-08-04 03:13:43,217 INFO L125 PetriNetUnfolderBase]: For 3249/3249 co-relation queries the response was YES. [2023-08-04 03:13:43,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179585 conditions, 89095 events. 74277/89095 cut-off events. For 3249/3249 co-relation queries the response was YES. Maximal size of possible extension queue 2538. Compared 386377 event pairs, 2626 based on Foata normal form. 4096/62000 useless extension candidates. Maximal degree in co-relation 54904. Up to 40192 conditions per place. [2023-08-04 03:13:43,548 INFO L140 encePairwiseOnDemand]: 706/709 looper letters, 0 selfloop transitions, 0 changer transitions 105/105 dead transitions. [2023-08-04 03:13:43,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 437 flow [2023-08-04 03:13:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:13:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:13:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1674 transitions. [2023-08-04 03:13:43,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722143864598025 [2023-08-04 03:13:43,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1674 transitions. [2023-08-04 03:13:43,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1674 transitions. [2023-08-04 03:13:43,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:13:43,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1674 transitions. [2023-08-04 03:13:43,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.8) internal successors, (1674), 5 states have internal predecessors, (1674), 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) [2023-08-04 03:13:43,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 709.0) internal successors, (4254), 6 states have internal predecessors, (4254), 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) [2023-08-04 03:13:43,561 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 709.0) internal successors, (4254), 6 states have internal predecessors, (4254), 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) [2023-08-04 03:13:43,561 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 167 flow. Second operand 5 states and 1674 transitions. [2023-08-04 03:13:43,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 437 flow [2023-08-04 03:13:43,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 105 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:13:43,740 INFO L231 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2023-08-04 03:13:43,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=709, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2023-08-04 03:13:43,741 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -11 predicate places. [2023-08-04 03:13:43,741 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2023-08-04 03:13:43,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.4) internal successors, (1607), 5 states have internal predecessors, (1607), 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) [2023-08-04 03:13:43,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:13:43,742 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:13:43,742 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:13:43,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:13:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:13:43,943 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:43,943 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:13:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 03:13:44,619 INFO L124 PetriNetUnfolderBase]: 967/5251 cut-off events. [2023-08-04 03:13:44,620 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:13:44,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 5251 events. 967/5251 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 44451 event pairs, 22 based on Foata normal form. 0/4528 useless extension candidates. Maximal degree in co-relation 3084. Up to 192 conditions per place. [2023-08-04 03:13:44,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 03:13:44,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 374 transitions, 838 flow [2023-08-04 03:13:44,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:13:44,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 374 transitions, 838 flow [2023-08-04 03:13:44,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 374 transitions, 838 flow [2023-08-04 03:13:44,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 03:13:45,220 INFO L124 PetriNetUnfolderBase]: 967/5251 cut-off events. [2023-08-04 03:13:45,220 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:13:45,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 5251 events. 967/5251 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 44451 event pairs, 22 based on Foata normal form. 0/4528 useless extension candidates. Maximal degree in co-relation 3084. Up to 192 conditions per place. [2023-08-04 03:13:45,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 22932 [2023-08-04 03:13:52,071 INFO L134 LiptonReduction]: Checked pairs total: 60060 [2023-08-04 03:13:52,072 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-08-04 03:13:52,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:13:52,074 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=true, 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;@25926873, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:13:52,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:13:52,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:13:52,079 INFO L124 PetriNetUnfolderBase]: 7/52 cut-off events. [2023-08-04 03:13:52,079 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:13:52,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:13:52,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:13:52,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:13:52,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:13:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash -104907388, now seen corresponding path program 1 times [2023-08-04 03:13:52,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:13:52,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528037121] [2023-08-04 03:13:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:13:52,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:13:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:13:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:13:52,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:13:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528037121] [2023-08-04 03:13:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528037121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:13:52,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:13:52,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:13:52,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602206833] [2023-08-04 03:13:52,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:13:52,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:13:52,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:13:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:13:52,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:13:52,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 720 [2023-08-04 03:13:52,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 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) [2023-08-04 03:13:52,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:13:52,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 720 [2023-08-04 03:13:52,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:15:44,029 INFO L124 PetriNetUnfolderBase]: 1247405/1516109 cut-off events. [2023-08-04 03:15:44,030 INFO L125 PetriNetUnfolderBase]: For 118953/118953 co-relation queries the response was YES. [2023-08-04 03:15:49,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028982 conditions, 1516109 events. 1247405/1516109 cut-off events. For 118953/118953 co-relation queries the response was YES. Maximal size of possible extension queue 29873. Compared 8924254 event pairs, 634880 based on Foata normal form. 0/977467 useless extension candidates. Maximal degree in co-relation 1093492. Up to 1449230 conditions per place. [2023-08-04 03:15:58,144 INFO L140 encePairwiseOnDemand]: 715/720 looper letters, 74 selfloop transitions, 2 changer transitions 3/97 dead transitions. [2023-08-04 03:15:58,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 436 flow [2023-08-04 03:15:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:15:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:15:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-08-04 03:15:58,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47824074074074074 [2023-08-04 03:15:58,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-08-04 03:15:58,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-08-04 03:15:58,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:15:58,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-08-04 03:15:58,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 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) [2023-08-04 03:15:58,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 720.0) internal successors, (2880), 4 states have internal predecessors, (2880), 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) [2023-08-04 03:15:58,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 720.0) internal successors, (2880), 4 states have internal predecessors, (2880), 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) [2023-08-04 03:15:58,167 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 278 flow. Second operand 3 states and 1033 transitions. [2023-08-04 03:15:58,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 436 flow [2023-08-04 03:15:58,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 436 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:15:58,266 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 268 flow [2023-08-04 03:15:58,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=720, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2023-08-04 03:15:58,267 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 03:15:58,267 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 268 flow [2023-08-04 03:15:58,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 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) [2023-08-04 03:15:58,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:15:58,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:15:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:15:58,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:15:58,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:15:58,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1841846613, now seen corresponding path program 1 times [2023-08-04 03:15:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:15:58,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140591579] [2023-08-04 03:15:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:15:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:15:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:15:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140591579] [2023-08-04 03:15:58,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140591579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:15:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799799748] [2023-08-04 03:15:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:58,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:15:58,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:15:58,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:15:58,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:15:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:58,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:15:58,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:15:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:15:58,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:15:58,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799799748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:15:58,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:15:58,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:15:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131885480] [2023-08-04 03:15:58,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:15:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:15:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:15:58,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:15:58,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:15:58,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 720 [2023-08-04 03:15:58,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 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) [2023-08-04 03:15:58,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:15:58,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 720 [2023-08-04 03:15:58,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand