/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-more-buffer-mult.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:26:45,728 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:26:45,815 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 15:26:45,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:26:45,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:26:45,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:26:45,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:26:45,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:26:45,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:26:45,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:26:45,859 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:26:45,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:26:45,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:26:45,861 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:26:45,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:26:45,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:26:45,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:26:45,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:26:45,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:26:45,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:26:45,862 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:26:45,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:26:45,863 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:26:45,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:26:45,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:26:45,864 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:26:45,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:26:45,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:26:45,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:26:45,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:26:45,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:26:45,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:26:45,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:26:45,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:26:45,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:26:45,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:26:46,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:26:46,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:26:46,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:26:46,209 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:26:46,210 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:26:46,211 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-08-24 15:26:47,414 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:26:47,638 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:26:47,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-08-24 15:26:47,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d72eda071/63ce07f0b01c4904a0c4c21c78c0db1d/FLAG7ea7814dd [2023-08-24 15:26:47,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d72eda071/63ce07f0b01c4904a0c4c21c78c0db1d [2023-08-24 15:26:47,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:26:47,662 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:26:47,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:26:47,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:26:47,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:26:47,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:26:47" (1/1) ... [2023-08-24 15:26:47,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61470c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:47, skipping insertion in model container [2023-08-24 15:26:47,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:26:47" (1/1) ... [2023-08-24 15:26:47,706 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:26:47,917 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-more-buffer-mult.wvr.c[4218,4231] [2023-08-24 15:26:47,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:26:47,940 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:26:47,988 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-more-buffer-mult.wvr.c[4218,4231] [2023-08-24 15:26:47,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:26:47,999 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:26:47,999 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:26:48,008 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:26:48,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48 WrapperNode [2023-08-24 15:26:48,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:26:48,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:26:48,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:26:48,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:26:48,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,036 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,069 INFO L138 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 317 [2023-08-24 15:26:48,070 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:26:48,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:26:48,071 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:26:48,071 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:26:48,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:26:48,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:26:48,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:26:48,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:26:48,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (1/1) ... [2023-08-24 15:26:48,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:26:48,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:48,150 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 15:26:48,179 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 15:26:48,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:26:48,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:26:48,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:26:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:26:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:26:48,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:26:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:26:48,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:26:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 15:26:48,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 15:26:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 15:26:48,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 15:26:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:26:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 15:26:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 15:26:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 15:26:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:26:48,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:26:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:26:48,199 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 15:26:48,300 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:26:48,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:26:48,802 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:26:48,977 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:26:48,977 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 15:26:48,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:26:48 BoogieIcfgContainer [2023-08-24 15:26:48,979 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:26:48,981 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:26:48,981 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:26:48,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:26:48,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:26:47" (1/3) ... [2023-08-24 15:26:48,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f422e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:26:48, skipping insertion in model container [2023-08-24 15:26:48,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:26:48" (2/3) ... [2023-08-24 15:26:48,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f422e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:26:48, skipping insertion in model container [2023-08-24 15:26:48,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:26:48" (3/3) ... [2023-08-24 15:26:48,986 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-08-24 15:26:49,002 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:26:49,002 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:26:49,002 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:26:49,077 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 15:26:49,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 224 transitions, 480 flow [2023-08-24 15:26:49,185 INFO L124 PetriNetUnfolderBase]: 18/220 cut-off events. [2023-08-24 15:26:49,185 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 15:26:49,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 220 events. 18/220 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 183. Up to 2 conditions per place. [2023-08-24 15:26:49,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 224 transitions, 480 flow [2023-08-24 15:26:49,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 208 transitions, 440 flow [2023-08-24 15:26:49,202 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:26:49,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 208 transitions, 440 flow [2023-08-24 15:26:49,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 208 transitions, 440 flow [2023-08-24 15:26:49,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 208 transitions, 440 flow [2023-08-24 15:26:49,254 INFO L124 PetriNetUnfolderBase]: 18/208 cut-off events. [2023-08-24 15:26:49,254 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 15:26:49,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 208 events. 18/208 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 183. Up to 2 conditions per place. [2023-08-24 15:26:49,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-08-24 15:26:57,439 INFO L134 LiptonReduction]: Checked pairs total: 4153 [2023-08-24 15:26:57,440 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-08-24 15:26:57,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:26:57,457 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;@56f1fe7e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:26:57,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 15:26:57,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:26:57,466 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-08-24 15:26:57,466 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 15:26:57,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:57,467 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 15:26:57,467 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 2 more)] === [2023-08-24 15:26:57,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1173720384, now seen corresponding path program 1 times [2023-08-24 15:26:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:57,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684632312] [2023-08-24 15:26:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:57,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:58,045 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 15:26:58,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684632312] [2023-08-24 15:26:58,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684632312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:26:58,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:26:58,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 15:26:58,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505066046] [2023-08-24 15:26:58,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:26:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:26:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:26:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:26:58,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 422 [2023-08-24 15:26:58,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 15:26:58,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:58,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 422 [2023-08-24 15:26:58,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:58,652 INFO L124 PetriNetUnfolderBase]: 2606/3582 cut-off events. [2023-08-24 15:26:58,652 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-08-24 15:26:58,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7115 conditions, 3582 events. 2606/3582 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15979 event pairs, 498 based on Foata normal form. 1/2283 useless extension candidates. Maximal degree in co-relation 5886. Up to 2275 conditions per place. [2023-08-24 15:26:58,683 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 47 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-24 15:26:58,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 255 flow [2023-08-24 15:26:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:26:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:26:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-24 15:26:58,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031595576619273 [2023-08-24 15:26:58,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-24 15:26:58,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-24 15:26:58,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:58,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-24 15:26:58,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 15:26:58,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 15:26:58,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 15:26:58,728 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 3 states and 637 transitions. [2023-08-24 15:26:58,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 255 flow [2023-08-24 15:26:58,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 229 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 15:26:58,743 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 101 flow [2023-08-24 15:26:58,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-24 15:26:58,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-24 15:26:58,748 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 101 flow [2023-08-24 15:26:58,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 15:26:58,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:58,750 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 15:26:58,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:26:58,750 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 2 more)] === [2023-08-24 15:26:58,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1174765711, now seen corresponding path program 1 times [2023-08-24 15:26:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:58,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887852323] [2023-08-24 15:26:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:58,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:58,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887852323] [2023-08-24 15:26:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887852323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:26:58,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:26:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 15:26:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196777837] [2023-08-24 15:26:58,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:26:58,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:26:58,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:58,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:26:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:26:58,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 422 [2023-08-24 15:26:58,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 15:26:58,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:58,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 422 [2023-08-24 15:26:58,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:59,441 INFO L124 PetriNetUnfolderBase]: 3843/5059 cut-off events. [2023-08-24 15:26:59,441 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2023-08-24 15:26:59,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11188 conditions, 5059 events. 3843/5059 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 22712 event pairs, 982 based on Foata normal form. 120/4228 useless extension candidates. Maximal degree in co-relation 4007. Up to 3577 conditions per place. [2023-08-24 15:26:59,477 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-24 15:26:59,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 285 flow [2023-08-24 15:26:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:26:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:26:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-24 15:26:59,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49842022116903634 [2023-08-24 15:26:59,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-24 15:26:59,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-24 15:26:59,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:59,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-24 15:26:59,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 15:26:59,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 15:26:59,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 15:26:59,485 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 101 flow. Second operand 3 states and 631 transitions. [2023-08-24 15:26:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 285 flow [2023-08-24 15:26:59,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:26:59,490 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 112 flow [2023-08-24 15:26:59,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-24 15:26:59,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-08-24 15:26:59,494 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 112 flow [2023-08-24 15:26:59,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 15:26:59,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:59,498 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 15:26:59,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 15:26:59,499 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 2 more)] === [2023-08-24 15:26:59,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1974936320, now seen corresponding path program 1 times [2023-08-24 15:26:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:59,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936343560] [2023-08-24 15:26:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:59,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:59,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936343560] [2023-08-24 15:26:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936343560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:26:59,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:26:59,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 15:26:59,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908015201] [2023-08-24 15:26:59,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:26:59,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:26:59,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:26:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:26:59,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 422 [2023-08-24 15:26:59,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 15:26:59,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:59,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 422 [2023-08-24 15:26:59,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:00,104 INFO L124 PetriNetUnfolderBase]: 3600/4879 cut-off events. [2023-08-24 15:27:00,104 INFO L125 PetriNetUnfolderBase]: For 1834/1834 co-relation queries the response was YES. [2023-08-24 15:27:00,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11391 conditions, 4879 events. 3600/4879 cut-off events. For 1834/1834 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23017 event pairs, 937 based on Foata normal form. 106/4530 useless extension candidates. Maximal degree in co-relation 8167. Up to 3548 conditions per place. [2023-08-24 15:27:00,138 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-24 15:27:00,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 301 flow [2023-08-24 15:27:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:27:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:27:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-24 15:27:00,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968404423380727 [2023-08-24 15:27:00,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-24 15:27:00,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-24 15:27:00,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:00,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-24 15:27:00,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 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 15:27:00,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 15:27:00,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 15:27:00,146 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 112 flow. Second operand 3 states and 629 transitions. [2023-08-24 15:27:00,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 301 flow [2023-08-24 15:27:00,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:27:00,149 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 124 flow [2023-08-24 15:27:00,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-24 15:27:00,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-24 15:27:00,154 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 124 flow [2023-08-24 15:27:00,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 15:27:00,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:00,155 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] [2023-08-24 15:27:00,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 15:27:00,156 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 2 more)] === [2023-08-24 15:27:00,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 271543926, now seen corresponding path program 1 times [2023-08-24 15:27:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:00,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039530441] [2023-08-24 15:27:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:00,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:00,330 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 15:27:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:00,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039530441] [2023-08-24 15:27:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039530441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:00,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:27:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 15:27:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144253246] [2023-08-24 15:27:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:27:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:27:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 15:27:00,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 422 [2023-08-24 15:27:00,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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 15:27:00,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:00,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 422 [2023-08-24 15:27:00,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:00,800 INFO L124 PetriNetUnfolderBase]: 3189/4593 cut-off events. [2023-08-24 15:27:00,800 INFO L125 PetriNetUnfolderBase]: For 2513/2513 co-relation queries the response was YES. [2023-08-24 15:27:00,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11217 conditions, 4593 events. 3189/4593 cut-off events. For 2513/2513 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24403 event pairs, 2374 based on Foata normal form. 96/4555 useless extension candidates. Maximal degree in co-relation 5010. Up to 3495 conditions per place. [2023-08-24 15:27:00,832 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 61 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-24 15:27:00,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 333 flow [2023-08-24 15:27:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 15:27:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 15:27:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-08-24 15:27:00,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377962085308057 [2023-08-24 15:27:00,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-08-24 15:27:00,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-08-24 15:27:00,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:00,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-08-24 15:27:00,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 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 15:27:00,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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 15:27:00,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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 15:27:00,841 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 124 flow. Second operand 4 states and 739 transitions. [2023-08-24 15:27:00,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 333 flow [2023-08-24 15:27:00,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:27:00,844 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 142 flow [2023-08-24 15:27:00,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-24 15:27:00,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 15:27:00,845 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 142 flow [2023-08-24 15:27:00,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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 15:27:00,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:00,846 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] [2023-08-24 15:27:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 15:27:00,846 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 2 more)] === [2023-08-24 15:27:00,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash 31755688, now seen corresponding path program 1 times [2023-08-24 15:27:00,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:00,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947020145] [2023-08-24 15:27:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:00,997 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 15:27:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947020145] [2023-08-24 15:27:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947020145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:00,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:27:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 15:27:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531049918] [2023-08-24 15:27:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:27:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:27:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 15:27:01,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 422 [2023-08-24 15:27:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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 15:27:01,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:01,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 422 [2023-08-24 15:27:01,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:01,644 INFO L124 PetriNetUnfolderBase]: 3929/5803 cut-off events. [2023-08-24 15:27:01,644 INFO L125 PetriNetUnfolderBase]: For 3196/3196 co-relation queries the response was YES. [2023-08-24 15:27:01,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 5803 events. 3929/5803 cut-off events. For 3196/3196 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33347 event pairs, 3012 based on Foata normal form. 166/5802 useless extension candidates. Maximal degree in co-relation 11254. Up to 4406 conditions per place. [2023-08-24 15:27:01,678 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 60 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-24 15:27:01,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 348 flow [2023-08-24 15:27:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 15:27:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 15:27:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 737 transitions. [2023-08-24 15:27:01,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43661137440758296 [2023-08-24 15:27:01,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 737 transitions. [2023-08-24 15:27:01,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 737 transitions. [2023-08-24 15:27:01,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:01,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 737 transitions. [2023-08-24 15:27:01,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 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 15:27:01,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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 15:27:01,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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 15:27:01,687 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 142 flow. Second operand 4 states and 737 transitions. [2023-08-24 15:27:01,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 348 flow [2023-08-24 15:27:01,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 344 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 15:27:01,693 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 161 flow [2023-08-24 15:27:01,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-24 15:27:01,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-08-24 15:27:01,695 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 161 flow [2023-08-24 15:27:01,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 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 15:27:01,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:01,696 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 15:27:01,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 15:27:01,696 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 2 more)] === [2023-08-24 15:27:01,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1434548942, now seen corresponding path program 1 times [2023-08-24 15:27:01,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:01,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218800940] [2023-08-24 15:27:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:27:02,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218800940] [2023-08-24 15:27:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218800940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518953792] [2023-08-24 15:27:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:02,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:02,195 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 15:27:02,209 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 15:27:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:02,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 15:27:02,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:02,492 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 15:27:02,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:27:02,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518953792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:02,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:27:02,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-08-24 15:27:02,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780556569] [2023-08-24 15:27:02,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:27:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:27:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:27:02,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 15:27:02,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:27:02,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:02,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 15:27:02,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:04,566 INFO L124 PetriNetUnfolderBase]: 14993/20562 cut-off events. [2023-08-24 15:27:04,566 INFO L125 PetriNetUnfolderBase]: For 6455/6455 co-relation queries the response was YES. [2023-08-24 15:27:04,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 20562 events. 14993/20562 cut-off events. For 6455/6455 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 109880 event pairs, 1082 based on Foata normal form. 372/20932 useless extension candidates. Maximal degree in co-relation 37789. Up to 8096 conditions per place. [2023-08-24 15:27:04,689 INFO L140 encePairwiseOnDemand]: 416/422 looper letters, 128 selfloop transitions, 8 changer transitions 5/141 dead transitions. [2023-08-24 15:27:04,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 141 transitions, 724 flow [2023-08-24 15:27:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:27:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:27:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1209 transitions. [2023-08-24 15:27:04,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774881516587678 [2023-08-24 15:27:04,693 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1209 transitions. [2023-08-24 15:27:04,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1209 transitions. [2023-08-24 15:27:04,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:04,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1209 transitions. [2023-08-24 15:27:04,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.5) internal successors, (1209), 6 states have internal predecessors, (1209), 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 15:27:04,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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 15:27:04,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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 15:27:04,704 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 161 flow. Second operand 6 states and 1209 transitions. [2023-08-24 15:27:04,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 141 transitions, 724 flow [2023-08-24 15:27:04,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 141 transitions, 719 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 15:27:04,713 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 211 flow [2023-08-24 15:27:04,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-08-24 15:27:04,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2023-08-24 15:27:04,716 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 211 flow [2023-08-24 15:27:04,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:27:04,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:04,717 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 15:27:04,731 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 15:27:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 15:27:04,933 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 2 more)] === [2023-08-24 15:27:04,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -141903402, now seen corresponding path program 2 times [2023-08-24 15:27:04,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:04,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691409507] [2023-08-24 15:27:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:05,340 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 15:27:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:05,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691409507] [2023-08-24 15:27:05,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691409507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:05,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:27:05,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 15:27:05,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422486592] [2023-08-24 15:27:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:05,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:27:05,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:27:05,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:27:05,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 15:27:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 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 15:27:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 15:27:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:07,457 INFO L124 PetriNetUnfolderBase]: 17581/24432 cut-off events. [2023-08-24 15:27:07,458 INFO L125 PetriNetUnfolderBase]: For 13550/13550 co-relation queries the response was YES. [2023-08-24 15:27:07,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63407 conditions, 24432 events. 17581/24432 cut-off events. For 13550/13550 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 136742 event pairs, 2210 based on Foata normal form. 152/24582 useless extension candidates. Maximal degree in co-relation 50813. Up to 16026 conditions per place. [2023-08-24 15:27:07,642 INFO L140 encePairwiseOnDemand]: 415/422 looper letters, 120 selfloop transitions, 11 changer transitions 26/157 dead transitions. [2023-08-24 15:27:07,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 157 transitions, 842 flow [2023-08-24 15:27:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:27:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:27:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1400 transitions. [2023-08-24 15:27:07,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2023-08-24 15:27:07,647 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1400 transitions. [2023-08-24 15:27:07,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1400 transitions. [2023-08-24 15:27:07,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:07,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1400 transitions. [2023-08-24 15:27:07,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.0) internal successors, (1400), 7 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 15:27:07,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 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 15:27:07,656 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 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 15:27:07,656 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 211 flow. Second operand 7 states and 1400 transitions. [2023-08-24 15:27:07,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 157 transitions, 842 flow [2023-08-24 15:27:07,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 157 transitions, 842 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 15:27:07,679 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 290 flow [2023-08-24 15:27:07,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=290, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-08-24 15:27:07,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2023-08-24 15:27:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 290 flow [2023-08-24 15:27:07,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 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 15:27:07,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:07,680 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 15:27:07,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 15:27:07,681 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 2 more)] === [2023-08-24 15:27:07,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -567978492, now seen corresponding path program 3 times [2023-08-24 15:27:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433678871] [2023-08-24 15:27:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:08,246 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 15:27:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433678871] [2023-08-24 15:27:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433678871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:08,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:27:08,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:27:08,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86586707] [2023-08-24 15:27:08,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:27:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:27:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 15:27:08,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 15:27:08,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:27:08,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:08,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 15:27:08,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:11,240 INFO L124 PetriNetUnfolderBase]: 25005/34523 cut-off events. [2023-08-24 15:27:11,240 INFO L125 PetriNetUnfolderBase]: For 36909/36909 co-relation queries the response was YES. [2023-08-24 15:27:11,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100149 conditions, 34523 events. 25005/34523 cut-off events. For 36909/36909 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 198954 event pairs, 2348 based on Foata normal form. 250/34771 useless extension candidates. Maximal degree in co-relation 83217. Up to 17020 conditions per place. [2023-08-24 15:27:11,463 INFO L140 encePairwiseOnDemand]: 413/422 looper letters, 170 selfloop transitions, 29 changer transitions 6/205 dead transitions. [2023-08-24 15:27:11,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1305 flow [2023-08-24 15:27:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:27:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:27:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1604 transitions. [2023-08-24 15:27:11,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47511848341232227 [2023-08-24 15:27:11,596 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1604 transitions. [2023-08-24 15:27:11,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1604 transitions. [2023-08-24 15:27:11,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:11,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1604 transitions. [2023-08-24 15:27:11,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 200.5) internal successors, (1604), 8 states have internal predecessors, (1604), 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 15:27:11,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 422.0) internal successors, (3798), 9 states have internal predecessors, (3798), 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 15:27:11,605 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 422.0) internal successors, (3798), 9 states have internal predecessors, (3798), 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 15:27:11,605 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 290 flow. Second operand 8 states and 1604 transitions. [2023-08-24 15:27:11,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1305 flow [2023-08-24 15:27:11,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 205 transitions, 1301 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 15:27:11,728 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 510 flow [2023-08-24 15:27:11,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2023-08-24 15:27:11,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2023-08-24 15:27:11,730 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 510 flow [2023-08-24 15:27:11,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:27:11,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:11,731 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 15:27:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 15:27:11,732 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 2 more)] === [2023-08-24 15:27:11,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash -481045102, now seen corresponding path program 4 times [2023-08-24 15:27:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:11,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553470507] [2023-08-24 15:27:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:12,085 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 15:27:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553470507] [2023-08-24 15:27:12,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553470507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:12,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702609456] [2023-08-24 15:27:12,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:27:12,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:12,089 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 15:27:12,117 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 15:27:12,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:27:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:12,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 15:27:12,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:12,426 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 15:27:12,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:12,513 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 15:27:12,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702609456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:12,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:12,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2023-08-24 15:27:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479232740] [2023-08-24 15:27:12,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:12,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 15:27:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 15:27:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-24 15:27:12,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 422 [2023-08-24 15:27:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 510 flow. Second operand has 16 states, 16 states have (on average 181.0625) internal successors, (2897), 16 states have internal predecessors, (2897), 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 15:27:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 422 [2023-08-24 15:27:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:21,080 INFO L124 PetriNetUnfolderBase]: 65180/90426 cut-off events. [2023-08-24 15:27:21,080 INFO L125 PetriNetUnfolderBase]: For 172319/172319 co-relation queries the response was YES. [2023-08-24 15:27:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312990 conditions, 90426 events. 65180/90426 cut-off events. For 172319/172319 co-relation queries the response was YES. Maximal size of possible extension queue 3116. Compared 599056 event pairs, 5482 based on Foata normal form. 4476/94900 useless extension candidates. Maximal degree in co-relation 276601. Up to 14447 conditions per place. [2023-08-24 15:27:21,781 INFO L140 encePairwiseOnDemand]: 412/422 looper letters, 518 selfloop transitions, 132 changer transitions 0/650 dead transitions. [2023-08-24 15:27:21,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 650 transitions, 5291 flow [2023-08-24 15:27:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 15:27:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 15:27:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3527 transitions. [2023-08-24 15:27:21,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643233280674039 [2023-08-24 15:27:21,791 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3527 transitions. [2023-08-24 15:27:21,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3527 transitions. [2023-08-24 15:27:21,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:21,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3527 transitions. [2023-08-24 15:27:21,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 195.94444444444446) internal successors, (3527), 18 states have internal predecessors, (3527), 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 15:27:21,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 422.0) internal successors, (8018), 19 states have internal predecessors, (8018), 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 15:27:21,814 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 422.0) internal successors, (8018), 19 states have internal predecessors, (8018), 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 15:27:21,815 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 510 flow. Second operand 18 states and 3527 transitions. [2023-08-24 15:27:21,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 650 transitions, 5291 flow [2023-08-24 15:27:23,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 650 transitions, 5222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 15:27:23,273 INFO L231 Difference]: Finished difference. Result has 104 places, 202 transitions, 1856 flow [2023-08-24 15:27:23,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1856, PETRI_PLACES=104, PETRI_TRANSITIONS=202} [2023-08-24 15:27:23,273 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2023-08-24 15:27:23,273 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 202 transitions, 1856 flow [2023-08-24 15:27:23,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 181.0625) internal successors, (2897), 16 states have internal predecessors, (2897), 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 15:27:23,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:23,275 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 15:27:23,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 15:27:23,479 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,SelfDestructingSolverStorable8 [2023-08-24 15:27:23,480 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 15:27:23,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1618422774, now seen corresponding path program 5 times [2023-08-24 15:27:23,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:23,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107991255] [2023-08-24 15:27:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:23,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:23,955 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 15:27:23,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:23,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107991255] [2023-08-24 15:27:23,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107991255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:23,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:27:23,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:27:23,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39215717] [2023-08-24 15:27:23,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:23,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:27:23,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:27:23,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 15:27:23,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 422 [2023-08-24 15:27:23,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 202 transitions, 1856 flow. Second operand has 6 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 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 15:27:23,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:23,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 422 [2023-08-24 15:27:23,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:35,590 INFO L124 PetriNetUnfolderBase]: 77918/110118 cut-off events. [2023-08-24 15:27:35,590 INFO L125 PetriNetUnfolderBase]: For 462789/462789 co-relation queries the response was YES. [2023-08-24 15:27:36,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475958 conditions, 110118 events. 77918/110118 cut-off events. For 462789/462789 co-relation queries the response was YES. Maximal size of possible extension queue 4131. Compared 767865 event pairs, 21578 based on Foata normal form. 594/110710 useless extension candidates. Maximal degree in co-relation 413627. Up to 76345 conditions per place. [2023-08-24 15:27:36,846 INFO L140 encePairwiseOnDemand]: 413/422 looper letters, 343 selfloop transitions, 182 changer transitions 69/594 dead transitions. [2023-08-24 15:27:36,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 594 transitions, 6205 flow [2023-08-24 15:27:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:27:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:27:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1954 transitions. [2023-08-24 15:27:36,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46303317535545024 [2023-08-24 15:27:36,851 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1954 transitions. [2023-08-24 15:27:36,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1954 transitions. [2023-08-24 15:27:36,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:36,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1954 transitions. [2023-08-24 15:27:36,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 195.4) internal successors, (1954), 10 states have internal predecessors, (1954), 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 15:27:36,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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 15:27:36,863 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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 15:27:36,863 INFO L175 Difference]: Start difference. First operand has 104 places, 202 transitions, 1856 flow. Second operand 10 states and 1954 transitions. [2023-08-24 15:27:36,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 594 transitions, 6205 flow [2023-08-24 15:27:45,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 594 transitions, 6095 flow, removed 55 selfloop flow, removed 0 redundant places. [2023-08-24 15:27:45,302 INFO L231 Difference]: Finished difference. Result has 121 places, 336 transitions, 3948 flow [2023-08-24 15:27:45,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3948, PETRI_PLACES=121, PETRI_TRANSITIONS=336} [2023-08-24 15:27:45,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2023-08-24 15:27:45,303 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 336 transitions, 3948 flow [2023-08-24 15:27:45,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 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 15:27:45,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:45,304 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 15:27:45,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 15:27:45,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 15:27:45,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash 220378546, now seen corresponding path program 6 times [2023-08-24 15:27:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:45,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824213995] [2023-08-24 15:27:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:45,567 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 15:27:45,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824213995] [2023-08-24 15:27:45,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824213995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168220715] [2023-08-24 15:27:45,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:27:45,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:45,573 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 15:27:45,577 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 15:27:45,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:27:45,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:45,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 15:27:45,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:46,045 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 15:27:46,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:27:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168220715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:27:46,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:27:46,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-08-24 15:27:46,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494760546] [2023-08-24 15:27:46,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:27:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:27:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:27:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-24 15:27:46,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 15:27:46,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 336 transitions, 3948 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:27:46,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:46,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 15:27:46,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:28:05,060 INFO L124 PetriNetUnfolderBase]: 111421/159343 cut-off events. [2023-08-24 15:28:05,060 INFO L125 PetriNetUnfolderBase]: For 766500/766500 co-relation queries the response was YES. [2023-08-24 15:28:06,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735449 conditions, 159343 events. 111421/159343 cut-off events. For 766500/766500 co-relation queries the response was YES. Maximal size of possible extension queue 6112. Compared 1206562 event pairs, 19088 based on Foata normal form. 2680/162021 useless extension candidates. Maximal degree in co-relation 721876. Up to 47327 conditions per place. [2023-08-24 15:28:06,580 INFO L140 encePairwiseOnDemand]: 415/422 looper letters, 585 selfloop transitions, 191 changer transitions 7/783 dead transitions. [2023-08-24 15:28:06,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 783 transitions, 9815 flow [2023-08-24 15:28:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:28:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:28:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2023-08-24 15:28:06,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794628751974723 [2023-08-24 15:28:06,583 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2023-08-24 15:28:06,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2023-08-24 15:28:06,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:28:06,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2023-08-24 15:28:06,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 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 15:28:06,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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 15:28:06,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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 15:28:06,590 INFO L175 Difference]: Start difference. First operand has 121 places, 336 transitions, 3948 flow. Second operand 6 states and 1214 transitions. [2023-08-24 15:28:06,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 783 transitions, 9815 flow [2023-08-24 15:28:43,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 783 transitions, 9763 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-24 15:28:43,896 INFO L231 Difference]: Finished difference. Result has 125 places, 491 transitions, 7083 flow [2023-08-24 15:28:43,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7083, PETRI_PLACES=125, PETRI_TRANSITIONS=491} [2023-08-24 15:28:43,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2023-08-24 15:28:43,897 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 491 transitions, 7083 flow [2023-08-24 15:28:43,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:28:43,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:28:43,898 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 15:28:43,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 15:28:44,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:28:44,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 15:28:44,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:28:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1680460490, now seen corresponding path program 7 times [2023-08-24 15:28:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:28:44,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854327471] [2023-08-24 15:28:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:28:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:28:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:28:44,405 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 15:28:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:28:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854327471] [2023-08-24 15:28:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854327471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:28:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852271215] [2023-08-24 15:28:44,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:28:44,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:28:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:28:44,407 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 15:28:44,409 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 15:28:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:28:44,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:28:44,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:28:44,606 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 15:28:44,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:28:44,689 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 15:28:44,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852271215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:28:44,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:28:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2023-08-24 15:28:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509643067] [2023-08-24 15:28:44,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:28:44,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:28:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:28:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:28:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:28:44,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 422 [2023-08-24 15:28:44,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 491 transitions, 7083 flow. Second operand has 12 states, 12 states have (on average 180.75) internal successors, (2169), 12 states have internal predecessors, (2169), 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 15:28:44,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:28:44,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 422 [2023-08-24 15:28:44,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:29:10,943 INFO L124 PetriNetUnfolderBase]: 130754/185808 cut-off events. [2023-08-24 15:29:10,943 INFO L125 PetriNetUnfolderBase]: For 1014930/1014930 co-relation queries the response was YES. [2023-08-24 15:29:12,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899055 conditions, 185808 events. 130754/185808 cut-off events. For 1014930/1014930 co-relation queries the response was YES. Maximal size of possible extension queue 7055. Compared 1414961 event pairs, 20838 based on Foata normal form. 4064/189870 useless extension candidates. Maximal degree in co-relation 848714. Up to 68340 conditions per place. [2023-08-24 15:29:13,273 INFO L140 encePairwiseOnDemand]: 413/422 looper letters, 431 selfloop transitions, 461 changer transitions 33/925 dead transitions. [2023-08-24 15:29:13,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 925 transitions, 13641 flow [2023-08-24 15:29:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:29:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:29:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1944 transitions. [2023-08-24 15:29:13,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606635071090047 [2023-08-24 15:29:13,279 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1944 transitions. [2023-08-24 15:29:13,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1944 transitions. [2023-08-24 15:29:13,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:29:13,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1944 transitions. [2023-08-24 15:29:13,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 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 15:29:13,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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 15:29:13,288 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 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 15:29:13,289 INFO L175 Difference]: Start difference. First operand has 125 places, 491 transitions, 7083 flow. Second operand 10 states and 1944 transitions. [2023-08-24 15:29:13,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 925 transitions, 13641 flow [2023-08-24 15:30:00,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 925 transitions, 13477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 15:30:00,130 INFO L231 Difference]: Finished difference. Result has 136 places, 598 transitions, 10060 flow [2023-08-24 15:30:00,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10060, PETRI_PLACES=136, PETRI_TRANSITIONS=598} [2023-08-24 15:30:00,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2023-08-24 15:30:00,132 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 598 transitions, 10060 flow [2023-08-24 15:30:00,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.75) internal successors, (2169), 12 states have internal predecessors, (2169), 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 15:30:00,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:30:00,132 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 15:30:00,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 15:30:00,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:30:00,337 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 15:30:00,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:30:00,338 INFO L85 PathProgramCache]: Analyzing trace with hash -18256108, now seen corresponding path program 8 times [2023-08-24 15:30:00,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:30:00,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388505429] [2023-08-24 15:30:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:30:00,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:30:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:30:00,720 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 15:30:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:30:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388505429] [2023-08-24 15:30:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388505429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:30:00,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:30:00,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:30:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321341856] [2023-08-24 15:30:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:30:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:30:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:30:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:30:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-24 15:30:00,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 422 [2023-08-24 15:30:00,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 598 transitions, 10060 flow. Second operand has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:30:00,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:30:00,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 422 [2023-08-24 15:30:00,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:30:27,815 INFO L124 PetriNetUnfolderBase]: 130244/184818 cut-off events. [2023-08-24 15:30:27,815 INFO L125 PetriNetUnfolderBase]: For 1263202/1263202 co-relation queries the response was YES. [2023-08-24 15:30:29,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978381 conditions, 184818 events. 130244/184818 cut-off events. For 1263202/1263202 co-relation queries the response was YES. Maximal size of possible extension queue 6963. Compared 1391764 event pairs, 37509 based on Foata normal form. 116/184932 useless extension candidates. Maximal degree in co-relation 927450. Up to 161544 conditions per place. [2023-08-24 15:30:29,795 INFO L140 encePairwiseOnDemand]: 415/422 looper letters, 351 selfloop transitions, 368 changer transitions 27/746 dead transitions. [2023-08-24 15:30:29,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 746 transitions, 12756 flow [2023-08-24 15:30:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:30:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:30:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1206 transitions. [2023-08-24 15:30:29,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476303317535545 [2023-08-24 15:30:29,798 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1206 transitions. [2023-08-24 15:30:29,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1206 transitions. [2023-08-24 15:30:29,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:30:29,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1206 transitions. [2023-08-24 15:30:29,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 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 15:30:29,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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 15:30:29,804 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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 15:30:29,804 INFO L175 Difference]: Start difference. First operand has 136 places, 598 transitions, 10060 flow. Second operand 6 states and 1206 transitions. [2023-08-24 15:30:29,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 746 transitions, 12756 flow [2023-08-24 15:31:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 746 transitions, 12124 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-08-24 15:31:53,745 INFO L231 Difference]: Finished difference. Result has 141 places, 600 transitions, 10641 flow [2023-08-24 15:31:53,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9500, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10641, PETRI_PLACES=141, PETRI_TRANSITIONS=600} [2023-08-24 15:31:53,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2023-08-24 15:31:53,746 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 600 transitions, 10641 flow [2023-08-24 15:31:53,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.33333333333334) internal successors, (1112), 6 states have internal predecessors, (1112), 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 15:31:53,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:31:53,747 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 15:31:53,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 15:31:53,747 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 15:31:53,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:31:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash 14607234, now seen corresponding path program 9 times [2023-08-24 15:31:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:31:53,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324857622] [2023-08-24 15:31:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:31:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:31:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:31:54,162 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 15:31:54,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:31:54,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324857622] [2023-08-24 15:31:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324857622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:31:54,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:31:54,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 15:31:54,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327388209] [2023-08-24 15:31:54,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:31:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:31:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:31:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:31:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:31:54,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 422 [2023-08-24 15:31:54,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 600 transitions, 10641 flow. Second operand has 7 states, 7 states have (on average 180.57142857142858) internal successors, (1264), 7 states have internal predecessors, (1264), 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 15:31:54,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:31:54,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 422 [2023-08-24 15:31:54,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand