/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:48:36,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:48:36,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 14:48:36,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:48:36,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:48:36,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:48:36,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:48:36,995 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:48:36,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:48:36,999 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:48:36,999 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:48:36,999 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:48:36,999 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:48:37,001 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:48:37,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:48:37,001 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:48:37,001 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:48:37,002 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:48:37,002 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:48:37,002 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:48:37,002 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:48:37,002 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:48:37,003 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:48:37,003 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:48:37,003 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:48:37,003 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:48:37,004 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:48:37,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:48:37,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:48:37,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:48:37,005 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:48:37,005 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:48:37,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:48:37,006 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:48:37,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:48:37,006 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:48:37,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:48:37,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:48:37,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:48:37,350 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:48:37,351 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:48:37,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-24 14:48:38,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:48:38,679 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:48:38,680 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-24 14:48:38,686 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25726ce1/8e989f10d8514b578f9a540dba6aa81b/FLAGf852f5d7b [2023-08-24 14:48:38,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25726ce1/8e989f10d8514b578f9a540dba6aa81b [2023-08-24 14:48:38,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:48:38,699 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:48:38,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:48:38,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:48:38,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:48:38,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:48:38" (1/1) ... [2023-08-24 14:48:38,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc7ef88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:38, skipping insertion in model container [2023-08-24 14:48:38,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:48:38" (1/1) ... [2023-08-24 14:48:38,725 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:48:38,935 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-24 14:48:38,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:48:38,962 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:48:39,005 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-24 14:48:39,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:48:39,026 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:48:39,026 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:48:39,032 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:48:39,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39 WrapperNode [2023-08-24 14:48:39,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:48:39,034 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:48:39,034 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:48:39,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:48:39,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,111 INFO L138 Inliner]: procedures = 28, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 376 [2023-08-24 14:48:39,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:48:39,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:48:39,112 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:48:39,112 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:48:39,123 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,146 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:48:39,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:48:39,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:48:39,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:48:39,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (1/1) ... [2023-08-24 14:48:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:48:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:39,194 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) [2023-08-24 14:48:39,200 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 [2023-08-24 14:48:39,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:48:39,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 14:48:39,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:48:39,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:48:39,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:48:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 14:48:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:48:39,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:48:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:48:39,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:48:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:48:39,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:48:39,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:48:39,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:48:39,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:48:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 14:48:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:48:39,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:48:39,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:48:39,234 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:48:39,363 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:48:39,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:48:39,904 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:48:40,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:48:40,039 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-24 14:48:40,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:48:40 BoogieIcfgContainer [2023-08-24 14:48:40,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:48:40,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:48:40,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:48:40,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:48:40,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:48:38" (1/3) ... [2023-08-24 14:48:40,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6425771e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:48:40, skipping insertion in model container [2023-08-24 14:48:40,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:39" (2/3) ... [2023-08-24 14:48:40,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6425771e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:48:40, skipping insertion in model container [2023-08-24 14:48:40,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:48:40" (3/3) ... [2023-08-24 14:48:40,051 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2023-08-24 14:48:40,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:48:40,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:48:40,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:48:40,161 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 14:48:40,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 337 transitions, 698 flow [2023-08-24 14:48:40,301 INFO L124 PetriNetUnfolderBase]: 35/334 cut-off events. [2023-08-24 14:48:40,302 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:48:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 334 events. 35/334 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 644 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-08-24 14:48:40,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 337 transitions, 698 flow [2023-08-24 14:48:40,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 324 transitions, 666 flow [2023-08-24 14:48:40,319 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:48:40,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 299 places, 324 transitions, 666 flow [2023-08-24 14:48:40,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 299 places, 324 transitions, 666 flow [2023-08-24 14:48:40,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 324 transitions, 666 flow [2023-08-24 14:48:40,402 INFO L124 PetriNetUnfolderBase]: 35/324 cut-off events. [2023-08-24 14:48:40,402 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:48:40,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 35/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 645 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-08-24 14:48:40,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 12480 [2023-08-24 14:48:51,107 INFO L134 LiptonReduction]: Checked pairs total: 13375 [2023-08-24 14:48:51,108 INFO L136 LiptonReduction]: Total number of compositions: 357 [2023-08-24 14:48:51,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:48:51,124 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23ba1914, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:48:51,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 14:48:51,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:48:51,134 INFO L124 PetriNetUnfolderBase]: 10/40 cut-off events. [2023-08-24 14:48:51,134 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:48:51,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:51,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:51,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:51,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:51,139 INFO L85 PathProgramCache]: Analyzing trace with hash 159734051, now seen corresponding path program 1 times [2023-08-24 14:48:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967532142] [2023-08-24 14:48:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:51,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:48:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:52,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967532142] [2023-08-24 14:48:52,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967532142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:52,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:52,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:48:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196035311] [2023-08-24 14:48:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:48:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:48:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:48:52,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 694 [2023-08-24 14:48:52,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 245.625) internal successors, (1965), 8 states have internal predecessors, (1965), 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) [2023-08-24 14:48:52,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:52,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 694 [2023-08-24 14:48:52,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:53,223 INFO L124 PetriNetUnfolderBase]: 3160/4272 cut-off events. [2023-08-24 14:48:53,224 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2023-08-24 14:48:53,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8847 conditions, 4272 events. 3160/4272 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18855 event pairs, 1146 based on Foata normal form. 0/3098 useless extension candidates. Maximal degree in co-relation 4746. Up to 1734 conditions per place. [2023-08-24 14:48:53,248 INFO L140 encePairwiseOnDemand]: 679/694 looper letters, 113 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2023-08-24 14:48:53,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 135 transitions, 586 flow [2023-08-24 14:48:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:48:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:48:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2328 transitions. [2023-08-24 14:48:53,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37271853986551395 [2023-08-24 14:48:53,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2328 transitions. [2023-08-24 14:48:53,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2328 transitions. [2023-08-24 14:48:53,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:53,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2328 transitions. [2023-08-24 14:48:53,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 258.6666666666667) internal successors, (2328), 9 states have internal predecessors, (2328), 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) [2023-08-24 14:48:53,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 694.0) internal successors, (6940), 10 states have internal predecessors, (6940), 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) [2023-08-24 14:48:53,303 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 694.0) internal successors, (6940), 10 states have internal predecessors, (6940), 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) [2023-08-24 14:48:53,305 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 100 flow. Second operand 9 states and 2328 transitions. [2023-08-24 14:48:53,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 135 transitions, 586 flow [2023-08-24 14:48:53,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 135 transitions, 554 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 14:48:53,317 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 242 flow [2023-08-24 14:48:53,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-08-24 14:48:53,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-24 14:48:53,321 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 242 flow [2023-08-24 14:48:53,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 245.625) internal successors, (1965), 8 states have internal predecessors, (1965), 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) [2023-08-24 14:48:53,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:53,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:53,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:48:53,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:53,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:53,325 INFO L85 PathProgramCache]: Analyzing trace with hash 680957432, now seen corresponding path program 1 times [2023-08-24 14:48:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:53,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651915850] [2023-08-24 14:48:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:53,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:53,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651915850] [2023-08-24 14:48:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651915850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874409272] [2023-08-24 14:48:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:53,491 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) [2023-08-24 14:48:53,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:48:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:53,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:48:53,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:48:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:53,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:48:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:53,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874409272] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:53,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:48:53,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 14:48:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506427533] [2023-08-24 14:48:53,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:48:53,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 694 [2023-08-24 14:48:53,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 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) [2023-08-24 14:48:53,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:53,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 694 [2023-08-24 14:48:53,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:54,419 INFO L124 PetriNetUnfolderBase]: 3465/4626 cut-off events. [2023-08-24 14:48:54,419 INFO L125 PetriNetUnfolderBase]: For 3092/3250 co-relation queries the response was YES. [2023-08-24 14:48:54,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13133 conditions, 4626 events. 3465/4626 cut-off events. For 3092/3250 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19638 event pairs, 842 based on Foata normal form. 189/3522 useless extension candidates. Maximal degree in co-relation 7103. Up to 2895 conditions per place. [2023-08-24 14:48:54,444 INFO L140 encePairwiseOnDemand]: 684/694 looper letters, 58 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2023-08-24 14:48:54,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 454 flow [2023-08-24 14:48:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1338 transitions. [2023-08-24 14:48:54,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855907780979827 [2023-08-24 14:48:54,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1338 transitions. [2023-08-24 14:48:54,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1338 transitions. [2023-08-24 14:48:54,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:54,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1338 transitions. [2023-08-24 14:48:54,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 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) [2023-08-24 14:48:54,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:54,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:54,460 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 242 flow. Second operand 5 states and 1338 transitions. [2023-08-24 14:48:54,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 454 flow [2023-08-24 14:48:54,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 448 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-24 14:48:54,468 INFO L231 Difference]: Finished difference. Result has 57 places, 62 transitions, 326 flow [2023-08-24 14:48:54,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=62} [2023-08-24 14:48:54,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-24 14:48:54,469 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 62 transitions, 326 flow [2023-08-24 14:48:54,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 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) [2023-08-24 14:48:54,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:54,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:54,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 14:48:54,676 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 [2023-08-24 14:48:54,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:54,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1236787133, now seen corresponding path program 1 times [2023-08-24 14:48:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:54,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927038997] [2023-08-24 14:48:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:54,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927038997] [2023-08-24 14:48:54,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927038997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:54,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:54,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:48:54,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908998699] [2023-08-24 14:48:54,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:54,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:54,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:48:54,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 694 [2023-08-24 14:48:54,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 62 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 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) [2023-08-24 14:48:54,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:54,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 694 [2023-08-24 14:48:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:55,144 INFO L124 PetriNetUnfolderBase]: 1513/2039 cut-off events. [2023-08-24 14:48:55,144 INFO L125 PetriNetUnfolderBase]: For 2164/2164 co-relation queries the response was YES. [2023-08-24 14:48:55,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6403 conditions, 2039 events. 1513/2039 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7578 event pairs, 836 based on Foata normal form. 3/1417 useless extension candidates. Maximal degree in co-relation 6374. Up to 1997 conditions per place. [2023-08-24 14:48:55,160 INFO L140 encePairwiseOnDemand]: 688/694 looper letters, 38 selfloop transitions, 4 changer transitions 6/50 dead transitions. [2023-08-24 14:48:55,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 303 flow [2023-08-24 14:48:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1323 transitions. [2023-08-24 14:48:55,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38126801152737755 [2023-08-24 14:48:55,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1323 transitions. [2023-08-24 14:48:55,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1323 transitions. [2023-08-24 14:48:55,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:55,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1323 transitions. [2023-08-24 14:48:55,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.6) internal successors, (1323), 5 states have internal predecessors, (1323), 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) [2023-08-24 14:48:55,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:55,175 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:55,175 INFO L175 Difference]: Start difference. First operand has 57 places, 62 transitions, 326 flow. Second operand 5 states and 1323 transitions. [2023-08-24 14:48:55,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 303 flow [2023-08-24 14:48:55,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 285 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-24 14:48:55,185 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 172 flow [2023-08-24 14:48:55,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-08-24 14:48:55,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2023-08-24 14:48:55,186 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 172 flow [2023-08-24 14:48:55,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 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) [2023-08-24 14:48:55,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:55,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:55,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:48:55,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:55,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash 255168498, now seen corresponding path program 1 times [2023-08-24 14:48:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:55,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102969209] [2023-08-24 14:48:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:55,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102969209] [2023-08-24 14:48:55,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102969209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029251902] [2023-08-24 14:48:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:55,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:55,375 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) [2023-08-24 14:48:55,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:48:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:55,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 14:48:55,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:48:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:48:55,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 14:48:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029251902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:55,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 14:48:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-08-24 14:48:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043471506] [2023-08-24 14:48:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:55,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-08-24 14:48:55,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 694 [2023-08-24 14:48:55,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 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) [2023-08-24 14:48:55,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:55,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 694 [2023-08-24 14:48:55,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:55,990 INFO L124 PetriNetUnfolderBase]: 1741/2383 cut-off events. [2023-08-24 14:48:55,990 INFO L125 PetriNetUnfolderBase]: For 1221/1350 co-relation queries the response was YES. [2023-08-24 14:48:55,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6627 conditions, 2383 events. 1741/2383 cut-off events. For 1221/1350 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9921 event pairs, 734 based on Foata normal form. 162/1823 useless extension candidates. Maximal degree in co-relation 6593. Up to 1681 conditions per place. [2023-08-24 14:48:56,007 INFO L140 encePairwiseOnDemand]: 690/694 looper letters, 75 selfloop transitions, 4 changer transitions 6/88 dead transitions. [2023-08-24 14:48:56,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 460 flow [2023-08-24 14:48:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1547 transitions. [2023-08-24 14:48:56,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445821325648415 [2023-08-24 14:48:56,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1547 transitions. [2023-08-24 14:48:56,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1547 transitions. [2023-08-24 14:48:56,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:56,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1547 transitions. [2023-08-24 14:48:56,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 309.4) internal successors, (1547), 5 states have internal predecessors, (1547), 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) [2023-08-24 14:48:56,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:56,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:56,024 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 172 flow. Second operand 5 states and 1547 transitions. [2023-08-24 14:48:56,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 460 flow [2023-08-24 14:48:56,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 88 transitions, 444 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 14:48:56,032 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 180 flow [2023-08-24 14:48:56,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-24 14:48:56,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-24 14:48:56,038 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 180 flow [2023-08-24 14:48:56,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 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) [2023-08-24 14:48:56,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:56,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:56,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 14:48:56,244 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 [2023-08-24 14:48:56,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:56,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -598068188, now seen corresponding path program 1 times [2023-08-24 14:48:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901189213] [2023-08-24 14:48:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:56,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901189213] [2023-08-24 14:48:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901189213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962979169] [2023-08-24 14:48:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:56,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:56,496 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) [2023-08-24 14:48:56,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 14:48:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:56,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 14:48:56,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:48:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:56,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:48:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:56,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962979169] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:56,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:48:56,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-08-24 14:48:56,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155313831] [2023-08-24 14:48:56,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 14:48:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:56,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 14:48:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-24 14:48:56,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 694 [2023-08-24 14:48:56,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 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) [2023-08-24 14:48:56,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:56,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 694 [2023-08-24 14:48:56,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:57,351 INFO L124 PetriNetUnfolderBase]: 2503/3421 cut-off events. [2023-08-24 14:48:57,351 INFO L125 PetriNetUnfolderBase]: For 4572/4767 co-relation queries the response was YES. [2023-08-24 14:48:57,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10038 conditions, 3421 events. 2503/3421 cut-off events. For 4572/4767 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14157 event pairs, 469 based on Foata normal form. 195/2987 useless extension candidates. Maximal degree in co-relation 10002. Up to 1738 conditions per place. [2023-08-24 14:48:57,367 INFO L140 encePairwiseOnDemand]: 683/694 looper letters, 77 selfloop transitions, 17 changer transitions 16/111 dead transitions. [2023-08-24 14:48:57,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 111 transitions, 694 flow [2023-08-24 14:48:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:48:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:48:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2039 transitions. [2023-08-24 14:48:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672550432276657 [2023-08-24 14:48:57,373 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2039 transitions. [2023-08-24 14:48:57,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2039 transitions. [2023-08-24 14:48:57,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:57,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2039 transitions. [2023-08-24 14:48:57,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.875) internal successors, (2039), 8 states have internal predecessors, (2039), 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) [2023-08-24 14:48:57,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 694.0) internal successors, (6246), 9 states have internal predecessors, (6246), 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) [2023-08-24 14:48:57,386 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 694.0) internal successors, (6246), 9 states have internal predecessors, (6246), 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) [2023-08-24 14:48:57,386 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 180 flow. Second operand 8 states and 2039 transitions. [2023-08-24 14:48:57,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 111 transitions, 694 flow [2023-08-24 14:48:57,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:48:57,393 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 264 flow [2023-08-24 14:48:57,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-24 14:48:57,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2023-08-24 14:48:57,394 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 264 flow [2023-08-24 14:48:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 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) [2023-08-24 14:48:57,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:57,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:57,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 14:48:57,600 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 [2023-08-24 14:48:57,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:57,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1955182438, now seen corresponding path program 1 times [2023-08-24 14:48:57,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:57,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971503306] [2023-08-24 14:48:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:57,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:48:57,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971503306] [2023-08-24 14:48:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971503306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:57,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:48:57,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989878933] [2023-08-24 14:48:57,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:48:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:48:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:48:57,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 694 [2023-08-24 14:48:57,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 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) [2023-08-24 14:48:57,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:57,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 694 [2023-08-24 14:48:57,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:58,173 INFO L124 PetriNetUnfolderBase]: 2255/3230 cut-off events. [2023-08-24 14:48:58,173 INFO L125 PetriNetUnfolderBase]: For 7463/8134 co-relation queries the response was YES. [2023-08-24 14:48:58,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11956 conditions, 3230 events. 2255/3230 cut-off events. For 7463/8134 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14779 event pairs, 1274 based on Foata normal form. 710/3479 useless extension candidates. Maximal degree in co-relation 11914. Up to 2151 conditions per place. [2023-08-24 14:48:58,196 INFO L140 encePairwiseOnDemand]: 689/694 looper letters, 48 selfloop transitions, 3 changer transitions 32/88 dead transitions. [2023-08-24 14:48:58,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 88 transitions, 576 flow [2023-08-24 14:48:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:48:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:48:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1236 transitions. [2023-08-24 14:48:58,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452449567723343 [2023-08-24 14:48:58,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1236 transitions. [2023-08-24 14:48:58,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1236 transitions. [2023-08-24 14:48:58,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:58,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1236 transitions. [2023-08-24 14:48:58,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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) [2023-08-24 14:48:58,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 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) [2023-08-24 14:48:58,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 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) [2023-08-24 14:48:58,210 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 264 flow. Second operand 4 states and 1236 transitions. [2023-08-24 14:48:58,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 88 transitions, 576 flow [2023-08-24 14:48:58,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 554 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-24 14:48:58,222 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 269 flow [2023-08-24 14:48:58,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2023-08-24 14:48:58,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-24 14:48:58,225 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 269 flow [2023-08-24 14:48:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 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) [2023-08-24 14:48:58,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:58,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:58,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:48:58,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:58,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:58,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1776963563, now seen corresponding path program 1 times [2023-08-24 14:48:58,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:58,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603405889] [2023-08-24 14:48:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:58,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:48:58,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:58,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603405889] [2023-08-24 14:48:58,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603405889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:58,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:58,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:48:58,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406287072] [2023-08-24 14:48:58,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:58,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:48:58,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:48:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:48:58,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 694 [2023-08-24 14:48:58,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 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) [2023-08-24 14:48:58,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:58,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 694 [2023-08-24 14:48:58,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:58,848 INFO L124 PetriNetUnfolderBase]: 2259/3239 cut-off events. [2023-08-24 14:48:58,848 INFO L125 PetriNetUnfolderBase]: For 7339/7986 co-relation queries the response was YES. [2023-08-24 14:48:58,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11618 conditions, 3239 events. 2259/3239 cut-off events. For 7339/7986 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14889 event pairs, 1275 based on Foata normal form. 710/3491 useless extension candidates. Maximal degree in co-relation 11576. Up to 2154 conditions per place. [2023-08-24 14:48:58,868 INFO L140 encePairwiseOnDemand]: 685/694 looper letters, 43 selfloop transitions, 7 changer transitions 39/94 dead transitions. [2023-08-24 14:48:58,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 607 flow [2023-08-24 14:48:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1400 transitions. [2023-08-24 14:48:58,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034582132564842 [2023-08-24 14:48:58,872 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1400 transitions. [2023-08-24 14:48:58,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1400 transitions. [2023-08-24 14:48:58,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:58,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1400 transitions. [2023-08-24 14:48:58,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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) [2023-08-24 14:48:58,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:58,881 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 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) [2023-08-24 14:48:58,881 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 269 flow. Second operand 5 states and 1400 transitions. [2023-08-24 14:48:58,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 607 flow [2023-08-24 14:48:58,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 596 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 14:48:58,894 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 299 flow [2023-08-24 14:48:58,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-24 14:48:58,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2023-08-24 14:48:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 299 flow [2023-08-24 14:48:58,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 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) [2023-08-24 14:48:58,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:58,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:58,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 14:48:58,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:48:58,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash 531864445, now seen corresponding path program 1 times [2023-08-24 14:48:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:58,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349843282] [2023-08-24 14:48:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:58,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:01,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:01,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349843282] [2023-08-24 14:49:01,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349843282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:01,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262298095] [2023-08-24 14:49:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:01,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:01,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:01,129 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) [2023-08-24 14:49:01,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 14:49:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:01,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-24 14:49:01,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:02,024 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 14:49:02,092 INFO L322 Elim1Store]: treesize reduction 111, result has 28.4 percent of original size [2023-08-24 14:49:02,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 103 treesize of output 108 [2023-08-24 14:49:02,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 51 [2023-08-24 14:49:02,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2023-08-24 14:49:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:02,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:02,392 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:02,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 286 [2023-08-24 14:49:02,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:02,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 260 [2023-08-24 14:49:02,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:02,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 180 [2023-08-24 14:49:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262298095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:49:08,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:49:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 34 [2023-08-24 14:49:08,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877956396] [2023-08-24 14:49:08,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:49:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 14:49:08,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 14:49:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 14:49:08,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 694 [2023-08-24 14:49:08,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 299 flow. Second operand has 36 states, 36 states have (on average 177.22222222222223) internal successors, (6380), 36 states have internal predecessors, (6380), 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) [2023-08-24 14:49:08,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:08,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 694 [2023-08-24 14:49:08,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:15,423 INFO L124 PetriNetUnfolderBase]: 9626/13476 cut-off events. [2023-08-24 14:49:15,424 INFO L125 PetriNetUnfolderBase]: For 23037/23659 co-relation queries the response was YES. [2023-08-24 14:49:15,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48556 conditions, 13476 events. 9626/13476 cut-off events. For 23037/23659 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 74750 event pairs, 754 based on Foata normal form. 623/12875 useless extension candidates. Maximal degree in co-relation 29317. Up to 4383 conditions per place. [2023-08-24 14:49:15,502 INFO L140 encePairwiseOnDemand]: 673/694 looper letters, 555 selfloop transitions, 250 changer transitions 1/808 dead transitions. [2023-08-24 14:49:15,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 808 transitions, 5653 flow [2023-08-24 14:49:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-24 14:49:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-24 14:49:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 12419 transitions. [2023-08-24 14:49:15,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.267086756419631 [2023-08-24 14:49:15,535 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 12419 transitions. [2023-08-24 14:49:15,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 12419 transitions. [2023-08-24 14:49:15,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:15,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 12419 transitions. [2023-08-24 14:49:15,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 185.3582089552239) internal successors, (12419), 67 states have internal predecessors, (12419), 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) [2023-08-24 14:49:15,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 694.0) internal successors, (47192), 68 states have internal predecessors, (47192), 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) [2023-08-24 14:49:15,629 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 694.0) internal successors, (47192), 68 states have internal predecessors, (47192), 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) [2023-08-24 14:49:15,629 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 299 flow. Second operand 67 states and 12419 transitions. [2023-08-24 14:49:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 808 transitions, 5653 flow [2023-08-24 14:49:15,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 808 transitions, 5415 flow, removed 96 selfloop flow, removed 4 redundant places. [2023-08-24 14:49:15,769 INFO L231 Difference]: Finished difference. Result has 162 places, 303 transitions, 2793 flow [2023-08-24 14:49:15,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=2793, PETRI_PLACES=162, PETRI_TRANSITIONS=303} [2023-08-24 14:49:15,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2023-08-24 14:49:15,771 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 303 transitions, 2793 flow [2023-08-24 14:49:15,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 177.22222222222223) internal successors, (6380), 36 states have internal predecessors, (6380), 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) [2023-08-24 14:49:15,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:15,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:15,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 14:49:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:15,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:15,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 725727835, now seen corresponding path program 2 times [2023-08-24 14:49:15,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:15,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427579670] [2023-08-24 14:49:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:15,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427579670] [2023-08-24 14:49:18,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427579670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019684131] [2023-08-24 14:49:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:49:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:18,102 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) [2023-08-24 14:49:18,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 14:49:18,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:49:18,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:49:18,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-24 14:49:18,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:18,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 14:49:18,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 14:49:18,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:49:18,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:49:18,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:49:18,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:49:18,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:49:18,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:49:19,400 INFO L322 Elim1Store]: treesize reduction 153, result has 30.8 percent of original size [2023-08-24 14:49:19,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 191 treesize of output 150 [2023-08-24 14:49:19,416 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 14:49:19,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 116 [2023-08-24 14:49:19,427 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 14:49:19,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 84 [2023-08-24 14:49:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:19,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:21,145 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:21,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 55 case distinctions, treesize of input 367 treesize of output 950 Received shutdown request... [2023-08-24 15:02:32,383 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 15:02:32,384 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 15:02:32,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 15:02:32,405 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:02:32,411 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:02:32,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:32,585 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 35ms.. [2023-08-24 15:02:32,587 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 15:02:32,587 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 15:02:32,587 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 15:02:32,587 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:02:32,590 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:02:32,590 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:02:32,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:02:32 BasicIcfg [2023-08-24 15:02:32,592 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:02:32,592 INFO L158 Benchmark]: Toolchain (without parser) took 833893.58ms. Allocated memory was 371.2MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 329.3MB in the beginning and 607.2MB in the end (delta: -277.9MB). Peak memory consumption was 906.9MB. Max. memory is 16.0GB. [2023-08-24 15:02:32,593 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory was 348.6MB in the beginning and 348.5MB in the end (delta: 82.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:02:32,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.09ms. Allocated memory is still 371.2MB. Free memory was 329.3MB in the beginning and 316.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 15:02:32,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.03ms. Allocated memory is still 371.2MB. Free memory was 316.7MB in the beginning and 313.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:02:32,593 INFO L158 Benchmark]: Boogie Preprocessor took 43.73ms. Allocated memory is still 371.2MB. Free memory was 313.6MB in the beginning and 311.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:02:32,594 INFO L158 Benchmark]: RCFGBuilder took 886.31ms. Allocated memory is still 371.2MB. Free memory was 311.5MB in the beginning and 255.9MB in the end (delta: 55.6MB). Peak memory consumption was 56.6MB. Max. memory is 16.0GB. [2023-08-24 15:02:32,594 INFO L158 Benchmark]: TraceAbstraction took 832547.12ms. Allocated memory was 371.2MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 255.9MB in the beginning and 607.2MB in the end (delta: -351.3MB). Peak memory consumption was 833.5MB. Max. memory is 16.0GB. [2023-08-24 15:02:32,595 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory was 348.6MB in the beginning and 348.5MB in the end (delta: 82.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 333.09ms. Allocated memory is still 371.2MB. Free memory was 329.3MB in the beginning and 316.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 78.03ms. Allocated memory is still 371.2MB. Free memory was 316.7MB in the beginning and 313.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 43.73ms. Allocated memory is still 371.2MB. Free memory was 313.6MB in the beginning and 311.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 886.31ms. Allocated memory is still 371.2MB. Free memory was 311.5MB in the beginning and 255.9MB in the end (delta: 55.6MB). Peak memory consumption was 56.6MB. Max. memory is 16.0GB. * TraceAbstraction took 832547.12ms. Allocated memory was 371.2MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 255.9MB in the beginning and 607.2MB in the end (delta: -351.3MB). Peak memory consumption was 833.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.8s, 299 PlacesBefore, 41 PlacesAfterwards, 324 TransitionsBefore, 41 TransitionsAfterwards, 12480 CoEnabledTransitionPairs, 7 FixpointIterations, 157 TrivialSequentialCompositions, 92 ConcurrentSequentialCompositions, 42 TrivialYvCompositions, 41 ConcurrentYvCompositions, 25 ChoiceCompositions, 357 TotalNumberOfCompositions, 13375 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11301, independent: 11185, independent conditional: 0, independent unconditional: 11185, dependent: 116, dependent conditional: 0, dependent unconditional: 116, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7363, independent: 7325, independent conditional: 0, independent unconditional: 7325, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11301, independent: 3860, independent conditional: 0, independent unconditional: 3860, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 7363, unknown conditional: 0, unknown unconditional: 7363] , Statistics on independence cache: Total cache size (in pairs): 143, Positive cache size: 130, Positive conditional cache size: 0, Positive unconditional cache size: 130, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 35ms.. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 35ms.. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 35ms.. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 34 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 35ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 411 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 832.4s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1309 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1309 mSDsluCounter, 55 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 48 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4754 IncrementalHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 7 mSDtfsCounter, 4754 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2793occurred in iteration=8, InterpolantAutomatonStates: 108, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 339 NumberOfCodeBlocks, 339 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 410 ConstructedInterpolants, 3 QuantifiedInterpolants, 3982 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1481 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 33/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown