/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:38:11,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:38:11,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:38:11,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:38:11,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:38:11,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:38:11,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:38:11,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:38:11,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:38:11,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:38:11,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:38:11,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:38:11,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:38:11,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:38:11,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:38:11,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:38:11,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:38:11,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:38:11,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:38:11,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:38:11,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:38:11,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:38:11,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:38:11,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:38:11,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:38:11,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:38:11,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:38:11,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:38:11,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 21:38:11,886 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:38:11,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:38:11,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:38:11,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:38:11,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:38:11,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:38:11,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:38:11,888 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:38:11,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:38:11,890 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:38:11,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:38:11,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:38:11,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:38:11,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:38:11,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:38:11,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:38:11,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:38:11,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:38:11,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:38:11,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:38:11,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:38:11,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:38:11,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:38:11,892 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:38:12,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:38:12,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:38:12,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:38:12,082 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:38:12,084 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:38:12,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-01-27 21:38:12,959 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:38:13,114 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:38:13,114 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-01-27 21:38:13,118 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad575ebe1/347bfc1b19d94972bf8cdafb6555f0c3/FLAGb0d3129e6 [2023-01-27 21:38:13,127 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad575ebe1/347bfc1b19d94972bf8cdafb6555f0c3 [2023-01-27 21:38:13,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:38:13,129 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:38:13,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:38:13,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:38:13,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:38:13,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74aa374d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13, skipping insertion in model container [2023-01-27 21:38:13,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:38:13,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:38:13,251 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2023-01-27 21:38:13,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:38:13,259 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:38:13,272 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2023-01-27 21:38:13,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:38:13,278 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:38:13,278 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:38:13,282 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:38:13,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13 WrapperNode [2023-01-27 21:38:13,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:38:13,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:38:13,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:38:13,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:38:13,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,302 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-01-27 21:38:13,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:38:13,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:38:13,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:38:13,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:38:13,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:38:13,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:38:13,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:38:13,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:38:13,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (1/1) ... [2023-01-27 21:38:13,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:38:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:13,340 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) [2023-01-27 21:38:13,342 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 [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:38:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:38:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:38:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:38:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:38:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:38:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:38:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:38:13,371 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:38:13,480 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:38:13,481 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:38:13,640 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:38:13,655 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:38:13,656 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 21:38:13,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:38:13 BoogieIcfgContainer [2023-01-27 21:38:13,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:38:13,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:38:13,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:38:13,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:38:13,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:38:13" (1/3) ... [2023-01-27 21:38:13,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3324c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:38:13, skipping insertion in model container [2023-01-27 21:38:13,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:38:13" (2/3) ... [2023-01-27 21:38:13,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3324c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:38:13, skipping insertion in model container [2023-01-27 21:38:13,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:38:13" (3/3) ... [2023-01-27 21:38:13,663 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-01-27 21:38:13,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:38:13,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:38:13,674 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:38:13,724 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 21:38:13,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-01-27 21:38:13,805 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2023-01-27 21:38:13,805 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:38:13,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-27 21:38:13,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-01-27 21:38:13,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-01-27 21:38:13,817 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:38:13,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-01-27 21:38:13,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-01-27 21:38:13,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-01-27 21:38:13,844 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2023-01-27 21:38:13,844 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:38:13,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-27 21:38:13,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-27 21:38:15,331 INFO L134 LiptonReduction]: Checked pairs total: 583 [2023-01-27 21:38:15,331 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-01-27 21:38:15,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:38:15,344 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;@3bb4f9ee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:38:15,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 21:38:15,348 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 21:38:15,348 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:38:15,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:15,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:15,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:15,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1436261647, now seen corresponding path program 1 times [2023-01-27 21:38:15,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:15,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542937598] [2023-01-27 21:38:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:15,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542937598] [2023-01-27 21:38:15,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542937598] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:38:15,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:38:15,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:38:15,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487613424] [2023-01-27 21:38:15,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:38:15,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:38:15,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:15,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:38:15,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:38:15,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 151 [2023-01-27 21:38:15,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-01-27 21:38:15,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:15,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 151 [2023-01-27 21:38:15,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:15,807 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-01-27 21:38:15,807 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-01-27 21:38:15,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-01-27 21:38:15,808 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-01-27 21:38:15,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-01-27 21:38:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:38:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:38:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-01-27 21:38:15,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099337748344371 [2023-01-27 21:38:15,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-01-27 21:38:15,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-01-27 21:38:15,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:15,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-01-27 21:38:15,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2023-01-27 21:38:15,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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) [2023-01-27 21:38:15,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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) [2023-01-27 21:38:15,826 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 231 transitions. [2023-01-27 21:38:15,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-01-27 21:38:15,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:38:15,828 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-01-27 21:38:15,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-01-27 21:38:15,831 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-27 21:38:15,832 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-01-27 21:38:15,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-01-27 21:38:15,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:15,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:15,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:38:15,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:15,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1046577200, now seen corresponding path program 1 times [2023-01-27 21:38:15,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:15,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321881925] [2023-01-27 21:38:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:15,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:15,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321881925] [2023-01-27 21:38:15,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321881925] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:38:15,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:38:15,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:38:15,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376888213] [2023-01-27 21:38:15,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:38:15,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:38:15,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:38:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:38:15,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:15,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 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) [2023-01-27 21:38:15,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:15,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:15,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:16,037 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2023-01-27 21:38:16,038 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-27 21:38:16,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2023-01-27 21:38:16,039 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-01-27 21:38:16,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2023-01-27 21:38:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:38:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:38:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 337 transitions. [2023-01-27 21:38:16,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463576158940397 [2023-01-27 21:38:16,041 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 337 transitions. [2023-01-27 21:38:16,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 337 transitions. [2023-01-27 21:38:16,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:16,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 337 transitions. [2023-01-27 21:38:16,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 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) [2023-01-27 21:38:16,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 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) [2023-01-27 21:38:16,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 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) [2023-01-27 21:38:16,044 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 337 transitions. [2023-01-27 21:38:16,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2023-01-27 21:38:16,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:38:16,045 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2023-01-27 21:38:16,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-01-27 21:38:16,046 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-27 21:38:16,046 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2023-01-27 21:38:16,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 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) [2023-01-27 21:38:16,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:16,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:16,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:38:16,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:16,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1397973902, now seen corresponding path program 2 times [2023-01-27 21:38:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719444150] [2023-01-27 21:38:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:16,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:16,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719444150] [2023-01-27 21:38:16,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719444150] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807786722] [2023-01-27 21:38:16,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:38:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:16,146 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) [2023-01-27 21:38:16,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:38:16,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:16,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:38:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:16,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:16,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807786722] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:16,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:38:16,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-27 21:38:16,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213551713] [2023-01-27 21:38:16,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:38:16,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:38:16,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:16,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:38:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:38:16,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 151 [2023-01-27 21:38:16,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 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) [2023-01-27 21:38:16,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:16,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 151 [2023-01-27 21:38:16,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:16,429 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2023-01-27 21:38:16,429 INFO L131 PetriNetUnfolder]: For 131/135 co-relation queries the response was YES. [2023-01-27 21:38:16,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 131/135 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 442 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2023-01-27 21:38:16,431 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-01-27 21:38:16,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2023-01-27 21:38:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:38:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:38:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-01-27 21:38:16,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685430463576159 [2023-01-27 21:38:16,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-01-27 21:38:16,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-01-27 21:38:16,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:16,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-01-27 21:38:16,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-01-27 21:38:16,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 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) [2023-01-27 21:38:16,435 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 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) [2023-01-27 21:38:16,435 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 283 transitions. [2023-01-27 21:38:16,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2023-01-27 21:38:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 21:38:16,436 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-01-27 21:38:16,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-01-27 21:38:16,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-01-27 21:38:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-01-27 21:38:16,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 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) [2023-01-27 21:38:16,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:16,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:16,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:38:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:16,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:16,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1096485560, now seen corresponding path program 3 times [2023-01-27 21:38:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132414581] [2023-01-27 21:38:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132414581] [2023-01-27 21:38:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132414581] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293478550] [2023-01-27 21:38:16,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:38:16,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:16,708 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) [2023-01-27 21:38:16,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:38:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:38:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:38:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:16,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293478550] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:16,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:16,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-01-27 21:38:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302306939] [2023-01-27 21:38:16,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:16,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:38:16,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:38:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:38:16,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:16,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 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) [2023-01-27 21:38:16,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:16,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:16,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:16,991 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2023-01-27 21:38:16,991 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-01-27 21:38:16,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 705 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2023-01-27 21:38:16,993 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2023-01-27 21:38:16,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2023-01-27 21:38:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:38:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:38:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 473 transitions. [2023-01-27 21:38:16,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474929044465468 [2023-01-27 21:38:16,995 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 473 transitions. [2023-01-27 21:38:16,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 473 transitions. [2023-01-27 21:38:16,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:16,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 473 transitions. [2023-01-27 21:38:16,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 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) [2023-01-27 21:38:16,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 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) [2023-01-27 21:38:16,998 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 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) [2023-01-27 21:38:16,999 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 473 transitions. [2023-01-27 21:38:16,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2023-01-27 21:38:17,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:38:17,001 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2023-01-27 21:38:17,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-01-27 21:38:17,001 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-01-27 21:38:17,001 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2023-01-27 21:38:17,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 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) [2023-01-27 21:38:17,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:17,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:17,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 21:38:17,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-27 21:38:17,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:17,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash -39967956, now seen corresponding path program 4 times [2023-01-27 21:38:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888381332] [2023-01-27 21:38:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:17,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888381332] [2023-01-27 21:38:17,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888381332] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564278098] [2023-01-27 21:38:17,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:38:17,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:17,287 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) [2023-01-27 21:38:17,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:38:17,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:38:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:38:17,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:17,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564278098] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:17,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:17,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 21:38:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979404132] [2023-01-27 21:38:17,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:17,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:38:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:38:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:38:17,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:17,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 62.5) internal successors, (500), 8 states have internal predecessors, (500), 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) [2023-01-27 21:38:17,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:17,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:17,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:17,489 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2023-01-27 21:38:17,489 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-01-27 21:38:17,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2023-01-27 21:38:17,492 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2023-01-27 21:38:17,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2023-01-27 21:38:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:38:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:38:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2023-01-27 21:38:17,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447682119205298 [2023-01-27 21:38:17,494 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 338 transitions. [2023-01-27 21:38:17,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 338 transitions. [2023-01-27 21:38:17,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:17,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 338 transitions. [2023-01-27 21:38:17,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2023-01-27 21:38:17,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 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) [2023-01-27 21:38:17,497 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 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) [2023-01-27 21:38:17,497 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 338 transitions. [2023-01-27 21:38:17,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2023-01-27 21:38:17,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 21:38:17,501 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2023-01-27 21:38:17,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-01-27 21:38:17,502 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-27 21:38:17,503 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2023-01-27 21:38:17,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 62.5) internal successors, (500), 8 states have internal predecessors, (500), 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) [2023-01-27 21:38:17,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:17,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:17,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 21:38:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:17,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:17,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -323427280, now seen corresponding path program 1 times [2023-01-27 21:38:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585537831] [2023-01-27 21:38:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:17,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:17,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585537831] [2023-01-27 21:38:17,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585537831] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:17,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804800669] [2023-01-27 21:38:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:17,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:17,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:17,799 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) [2023-01-27 21:38:17,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:38:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 21:38:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:17,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:17,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804800669] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:17,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-01-27 21:38:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023339013] [2023-01-27 21:38:17,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:38:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:38:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:38:17,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 151 [2023-01-27 21:38:17,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 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) [2023-01-27 21:38:17,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:17,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 151 [2023-01-27 21:38:17,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:17,978 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2023-01-27 21:38:17,978 INFO L131 PetriNetUnfolder]: For 493/512 co-relation queries the response was YES. [2023-01-27 21:38:17,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 493/512 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 861 event pairs, 20 based on Foata normal form. 19/247 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2023-01-27 21:38:17,979 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-01-27 21:38:17,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2023-01-27 21:38:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:38:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:38:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2023-01-27 21:38:17,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49503311258278143 [2023-01-27 21:38:17,980 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2023-01-27 21:38:17,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2023-01-27 21:38:17,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:17,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2023-01-27 21:38:17,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2023-01-27 21:38:17,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 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) [2023-01-27 21:38:17,982 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 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) [2023-01-27 21:38:17,982 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 299 transitions. [2023-01-27 21:38:17,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2023-01-27 21:38:17,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-01-27 21:38:17,984 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2023-01-27 21:38:17,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-01-27 21:38:17,984 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-27 21:38:17,984 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2023-01-27 21:38:17,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 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) [2023-01-27 21:38:17,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:17,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:17,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:18,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:18,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:18,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1179339409, now seen corresponding path program 2 times [2023-01-27 21:38:18,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:18,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881142246] [2023-01-27 21:38:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881142246] [2023-01-27 21:38:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881142246] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093126054] [2023-01-27 21:38:18,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:38:18,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:18,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:18,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:18,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:38:18,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:18,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093126054] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:18,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:18,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-01-27 21:38:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821429133] [2023-01-27 21:38:18,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:18,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:38:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:38:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:38:18,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:18,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 12 states, 12 states have (on average 62.666666666666664) internal successors, (752), 12 states have internal predecessors, (752), 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) [2023-01-27 21:38:18,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:18,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:18,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:18,722 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-01-27 21:38:18,722 INFO L131 PetriNetUnfolder]: For 1086/1086 co-relation queries the response was YES. [2023-01-27 21:38:18,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 503 events. 265/503 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2160 event pairs, 41 based on Foata normal form. 12/515 useless extension candidates. Maximal degree in co-relation 1607. Up to 185 conditions per place. [2023-01-27 21:38:18,725 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 68 selfloop transitions, 20 changer transitions 7/95 dead transitions. [2023-01-27 21:38:18,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 738 flow [2023-01-27 21:38:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:38:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:38:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 676 transitions. [2023-01-27 21:38:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447682119205298 [2023-01-27 21:38:18,726 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 676 transitions. [2023-01-27 21:38:18,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 676 transitions. [2023-01-27 21:38:18,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:18,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 676 transitions. [2023-01-27 21:38:18,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 67.6) internal successors, (676), 10 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:38:18,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 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) [2023-01-27 21:38:18,730 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 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) [2023-01-27 21:38:18,730 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 10 states and 676 transitions. [2023-01-27 21:38:18,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 95 transitions, 738 flow [2023-01-27 21:38:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 720 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-27 21:38:18,733 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 448 flow [2023-01-27 21:38:18,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-01-27 21:38:18,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-01-27 21:38:18,734 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 448 flow [2023-01-27 21:38:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.666666666666664) internal successors, (752), 12 states have internal predecessors, (752), 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) [2023-01-27 21:38:18,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:18,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:18,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:18,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:18,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:18,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1524658179, now seen corresponding path program 3 times [2023-01-27 21:38:18,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:18,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888992903] [2023-01-27 21:38:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:19,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888992903] [2023-01-27 21:38:19,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888992903] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769759544] [2023-01-27 21:38:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:38:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:19,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:19,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:38:19,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:38:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:19,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:19,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:19,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769759544] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:19,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-27 21:38:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168826207] [2023-01-27 21:38:19,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:38:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:38:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:38:19,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:19,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 448 flow. Second operand has 14 states, 14 states have (on average 62.214285714285715) internal successors, (871), 14 states have internal predecessors, (871), 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) [2023-01-27 21:38:19,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:19,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:19,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:19,633 INFO L130 PetriNetUnfolder]: 335/629 cut-off events. [2023-01-27 21:38:19,633 INFO L131 PetriNetUnfolder]: For 2648/2648 co-relation queries the response was YES. [2023-01-27 21:38:19,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 629 events. 335/629 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2877 event pairs, 45 based on Foata normal form. 38/667 useless extension candidates. Maximal degree in co-relation 2424. Up to 209 conditions per place. [2023-01-27 21:38:19,637 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 90 selfloop transitions, 40 changer transitions 10/140 dead transitions. [2023-01-27 21:38:19,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 140 transitions, 1179 flow [2023-01-27 21:38:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:38:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:38:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1205 transitions. [2023-01-27 21:38:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44334069168506257 [2023-01-27 21:38:19,640 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1205 transitions. [2023-01-27 21:38:19,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1205 transitions. [2023-01-27 21:38:19,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:19,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1205 transitions. [2023-01-27 21:38:19,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.94444444444444) internal successors, (1205), 18 states have internal predecessors, (1205), 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) [2023-01-27 21:38:19,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 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) [2023-01-27 21:38:19,645 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 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) [2023-01-27 21:38:19,645 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 448 flow. Second operand 18 states and 1205 transitions. [2023-01-27 21:38:19,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 140 transitions, 1179 flow [2023-01-27 21:38:19,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 140 transitions, 1104 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-01-27 21:38:19,650 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 725 flow [2023-01-27 21:38:19,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=725, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-01-27 21:38:19,651 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-27 21:38:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 725 flow [2023-01-27 21:38:19,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.214285714285715) internal successors, (871), 14 states have internal predecessors, (871), 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) [2023-01-27 21:38:19,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:19,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:19,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:19,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:19,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1900702783, now seen corresponding path program 4 times [2023-01-27 21:38:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780685334] [2023-01-27 21:38:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:19,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780685334] [2023-01-27 21:38:19,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780685334] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531739215] [2023-01-27 21:38:19,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:38:19,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:19,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:19,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:19,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:38:19,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:38:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:19,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:20,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531739215] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:20,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-27 21:38:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310648911] [2023-01-27 21:38:20,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:38:20,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:38:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:38:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:20,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 61.92857142857143) internal successors, (867), 14 states have internal predecessors, (867), 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) [2023-01-27 21:38:20,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:20,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:20,690 INFO L130 PetriNetUnfolder]: 469/939 cut-off events. [2023-01-27 21:38:20,690 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-01-27 21:38:20,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 939 events. 469/939 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5117 event pairs, 10 based on Foata normal form. 16/955 useless extension candidates. Maximal degree in co-relation 4818. Up to 293 conditions per place. [2023-01-27 21:38:20,695 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 121 selfloop transitions, 91 changer transitions 44/256 dead transitions. [2023-01-27 21:38:20,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 256 transitions, 2777 flow [2023-01-27 21:38:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 21:38:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 21:38:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2110 transitions. [2023-01-27 21:38:20,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366721854304636 [2023-01-27 21:38:20,699 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2110 transitions. [2023-01-27 21:38:20,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2110 transitions. [2023-01-27 21:38:20,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:20,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2110 transitions. [2023-01-27 21:38:20,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 65.9375) internal successors, (2110), 32 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) [2023-01-27 21:38:20,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 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) [2023-01-27 21:38:20,709 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 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) [2023-01-27 21:38:20,709 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 725 flow. Second operand 32 states and 2110 transitions. [2023-01-27 21:38:20,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 256 transitions, 2777 flow [2023-01-27 21:38:20,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 256 transitions, 2456 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-01-27 21:38:20,730 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1544 flow [2023-01-27 21:38:20,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1544, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2023-01-27 21:38:20,731 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-01-27 21:38:20,731 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1544 flow [2023-01-27 21:38:20,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.92857142857143) internal successors, (867), 14 states have internal predecessors, (867), 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) [2023-01-27 21:38:20,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:20,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:20,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:20,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:20,938 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:20,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1874186445, now seen corresponding path program 5 times [2023-01-27 21:38:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061757192] [2023-01-27 21:38:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061757192] [2023-01-27 21:38:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061757192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109924147] [2023-01-27 21:38:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:38:21,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:21,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:21,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:21,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:38:21,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:21,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109924147] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:21,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-27 21:38:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139799967] [2023-01-27 21:38:21,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:21,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:38:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:38:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:38:21,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:21,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1544 flow. Second operand has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 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) [2023-01-27 21:38:21,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:21,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:21,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:21,589 INFO L130 PetriNetUnfolder]: 405/798 cut-off events. [2023-01-27 21:38:21,589 INFO L131 PetriNetUnfolder]: For 13818/13818 co-relation queries the response was YES. [2023-01-27 21:38:21,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 798 events. 405/798 cut-off events. For 13818/13818 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4112 event pairs, 32 based on Foata normal form. 24/822 useless extension candidates. Maximal degree in co-relation 4674. Up to 221 conditions per place. [2023-01-27 21:38:21,595 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 103 selfloop transitions, 86 changer transitions 3/192 dead transitions. [2023-01-27 21:38:21,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 2332 flow [2023-01-27 21:38:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:38:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:38:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1318 transitions. [2023-01-27 21:38:21,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43642384105960264 [2023-01-27 21:38:21,599 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1318 transitions. [2023-01-27 21:38:21,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1318 transitions. [2023-01-27 21:38:21,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:21,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1318 transitions. [2023-01-27 21:38:21,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.9) internal successors, (1318), 20 states have internal predecessors, (1318), 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) [2023-01-27 21:38:21,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 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) [2023-01-27 21:38:21,606 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 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) [2023-01-27 21:38:21,606 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1544 flow. Second operand 20 states and 1318 transitions. [2023-01-27 21:38:21,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 2332 flow [2023-01-27 21:38:21,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 192 transitions, 1998 flow, removed 134 selfloop flow, removed 6 redundant places. [2023-01-27 21:38:21,667 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1491 flow [2023-01-27 21:38:21,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1491, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2023-01-27 21:38:21,668 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-01-27 21:38:21,668 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1491 flow [2023-01-27 21:38:21,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 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) [2023-01-27 21:38:21,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:21,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:21,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 21:38:21,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-27 21:38:21,875 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:21,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1455539503, now seen corresponding path program 6 times [2023-01-27 21:38:21,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:21,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970618433] [2023-01-27 21:38:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:21,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970618433] [2023-01-27 21:38:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970618433] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258404163] [2023-01-27 21:38:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:38:21,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:21,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:21,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 21:38:21,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:38:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:21,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:22,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258404163] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:22,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:22,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-27 21:38:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089964369] [2023-01-27 21:38:22,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:22,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:38:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:38:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:38:22,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:22,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1491 flow. Second operand has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 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) [2023-01-27 21:38:22,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:22,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:22,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:22,727 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2023-01-27 21:38:22,728 INFO L131 PetriNetUnfolder]: For 32066/32066 co-relation queries the response was YES. [2023-01-27 21:38:22,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 1264 events. 649/1264 cut-off events. For 32066/32066 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7386 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 8056. Up to 686 conditions per place. [2023-01-27 21:38:22,738 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 179 selfloop transitions, 124 changer transitions 2/305 dead transitions. [2023-01-27 21:38:22,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 3898 flow [2023-01-27 21:38:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 21:38:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 21:38:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1595 transitions. [2023-01-27 21:38:22,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440121412803532 [2023-01-27 21:38:22,742 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1595 transitions. [2023-01-27 21:38:22,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1595 transitions. [2023-01-27 21:38:22,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:22,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1595 transitions. [2023-01-27 21:38:22,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.45833333333333) internal successors, (1595), 24 states have internal predecessors, (1595), 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) [2023-01-27 21:38:22,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 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) [2023-01-27 21:38:22,752 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 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) [2023-01-27 21:38:22,752 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1491 flow. Second operand 24 states and 1595 transitions. [2023-01-27 21:38:22,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 3898 flow [2023-01-27 21:38:22,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 305 transitions, 3711 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-01-27 21:38:22,791 INFO L231 Difference]: Finished difference. Result has 139 places, 200 transitions, 2926 flow [2023-01-27 21:38:22,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2926, PETRI_PLACES=139, PETRI_TRANSITIONS=200} [2023-01-27 21:38:22,791 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-01-27 21:38:22,792 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 200 transitions, 2926 flow [2023-01-27 21:38:22,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 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) [2023-01-27 21:38:22,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:22,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:22,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:22,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:22,998 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:22,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 862096835, now seen corresponding path program 7 times [2023-01-27 21:38:22,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:22,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561107322] [2023-01-27 21:38:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:22,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:23,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561107322] [2023-01-27 21:38:23,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561107322] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644003211] [2023-01-27 21:38:23,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:38:23,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:23,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:23,085 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:23,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 21:38:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:23,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:23,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644003211] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:23,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-27 21:38:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327855190] [2023-01-27 21:38:23,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:38:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:38:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:38:23,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:23,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 200 transitions, 2926 flow. Second operand has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 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) [2023-01-27 21:38:23,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:23,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:23,764 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2023-01-27 21:38:23,764 INFO L131 PetriNetUnfolder]: For 52704/52704 co-relation queries the response was YES. [2023-01-27 21:38:23,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 1518 events. 759/1518 cut-off events. For 52704/52704 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9435 event pairs, 61 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 11351. Up to 501 conditions per place. [2023-01-27 21:38:23,779 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 142 selfloop transitions, 163 changer transitions 6/311 dead transitions. [2023-01-27 21:38:23,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 311 transitions, 5135 flow [2023-01-27 21:38:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 21:38:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 21:38:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1438 transitions. [2023-01-27 21:38:23,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328717639975918 [2023-01-27 21:38:23,781 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1438 transitions. [2023-01-27 21:38:23,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1438 transitions. [2023-01-27 21:38:23,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:23,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1438 transitions. [2023-01-27 21:38:23,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.36363636363636) internal successors, (1438), 22 states have internal predecessors, (1438), 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) [2023-01-27 21:38:23,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 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) [2023-01-27 21:38:23,786 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 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) [2023-01-27 21:38:23,786 INFO L175 Difference]: Start difference. First operand has 139 places, 200 transitions, 2926 flow. Second operand 22 states and 1438 transitions. [2023-01-27 21:38:23,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 311 transitions, 5135 flow [2023-01-27 21:38:23,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 4534 flow, removed 276 selfloop flow, removed 6 redundant places. [2023-01-27 21:38:23,881 INFO L231 Difference]: Finished difference. Result has 163 places, 242 transitions, 3757 flow [2023-01-27 21:38:23,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3757, PETRI_PLACES=163, PETRI_TRANSITIONS=242} [2023-01-27 21:38:23,881 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-01-27 21:38:23,881 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 242 transitions, 3757 flow [2023-01-27 21:38:23,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 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) [2023-01-27 21:38:23,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:23,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:23,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:24,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 21:38:24,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:24,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash 860907543, now seen corresponding path program 8 times [2023-01-27 21:38:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356828441] [2023-01-27 21:38:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:24,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356828441] [2023-01-27 21:38:24,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356828441] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086896664] [2023-01-27 21:38:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:38:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:24,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:24,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 21:38:24,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:24,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:24,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:38:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:24,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:24,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086896664] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:24,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:24,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-27 21:38:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044177850] [2023-01-27 21:38:24,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:38:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:38:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:38:24,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:24,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 242 transitions, 3757 flow. Second operand has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 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) [2023-01-27 21:38:24,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:24,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:24,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:24,741 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2023-01-27 21:38:24,741 INFO L131 PetriNetUnfolder]: For 68928/68928 co-relation queries the response was YES. [2023-01-27 21:38:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12559 conditions, 1444 events. 729/1444 cut-off events. For 68928/68928 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8778 event pairs, 155 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 11185. Up to 681 conditions per place. [2023-01-27 21:38:24,760 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 127 selfloop transitions, 143 changer transitions 3/273 dead transitions. [2023-01-27 21:38:24,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 4407 flow [2023-01-27 21:38:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:38:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:38:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 857 transitions. [2023-01-27 21:38:24,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43657666836474784 [2023-01-27 21:38:24,762 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 857 transitions. [2023-01-27 21:38:24,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 857 transitions. [2023-01-27 21:38:24,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:24,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 857 transitions. [2023-01-27 21:38:24,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.92307692307692) internal successors, (857), 13 states have internal predecessors, (857), 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) [2023-01-27 21:38:24,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 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) [2023-01-27 21:38:24,765 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 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) [2023-01-27 21:38:24,765 INFO L175 Difference]: Start difference. First operand has 163 places, 242 transitions, 3757 flow. Second operand 13 states and 857 transitions. [2023-01-27 21:38:24,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 4407 flow [2023-01-27 21:38:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 4211 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-01-27 21:38:24,884 INFO L231 Difference]: Finished difference. Result has 173 places, 237 transitions, 3869 flow [2023-01-27 21:38:24,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3869, PETRI_PLACES=173, PETRI_TRANSITIONS=237} [2023-01-27 21:38:24,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-01-27 21:38:24,885 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 237 transitions, 3869 flow [2023-01-27 21:38:24,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 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) [2023-01-27 21:38:24,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:24,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:24,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:25,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 21:38:25,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:25,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1477455475, now seen corresponding path program 9 times [2023-01-27 21:38:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564101952] [2023-01-27 21:38:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:25,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564101952] [2023-01-27 21:38:25,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564101952] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410788981] [2023-01-27 21:38:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:38:25,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:25,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:25,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 21:38:25,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:38:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 21:38:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:25,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410788981] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:25,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:25,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:38:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313487699] [2023-01-27 21:38:25,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:38:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:38:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:38:25,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 151 [2023-01-27 21:38:25,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 237 transitions, 3869 flow. Second operand has 19 states, 19 states have (on average 54.26315789473684) internal successors, (1031), 19 states have internal predecessors, (1031), 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) [2023-01-27 21:38:25,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:25,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 151 [2023-01-27 21:38:25,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:26,085 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2023-01-27 21:38:26,085 INFO L131 PetriNetUnfolder]: For 96941/96952 co-relation queries the response was YES. [2023-01-27 21:38:26,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 1788 events. 879/1788 cut-off events. For 96941/96952 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11793 event pairs, 120 based on Foata normal form. 82/1870 useless extension candidates. Maximal degree in co-relation 15717. Up to 900 conditions per place. [2023-01-27 21:38:26,103 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 196 selfloop transitions, 89 changer transitions 61/352 dead transitions. [2023-01-27 21:38:26,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 352 transitions, 6317 flow [2023-01-27 21:38:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:38:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:38:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 595 transitions. [2023-01-27 21:38:26,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39403973509933776 [2023-01-27 21:38:26,104 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 595 transitions. [2023-01-27 21:38:26,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 595 transitions. [2023-01-27 21:38:26,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:26,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 595 transitions. [2023-01-27 21:38:26,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.5) internal successors, (595), 10 states have internal predecessors, (595), 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) [2023-01-27 21:38:26,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 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) [2023-01-27 21:38:26,107 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 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) [2023-01-27 21:38:26,107 INFO L175 Difference]: Start difference. First operand has 173 places, 237 transitions, 3869 flow. Second operand 10 states and 595 transitions. [2023-01-27 21:38:26,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 352 transitions, 6317 flow [2023-01-27 21:38:26,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 352 transitions, 6029 flow, removed 20 selfloop flow, removed 15 redundant places. [2023-01-27 21:38:26,257 INFO L231 Difference]: Finished difference. Result has 170 places, 247 transitions, 4397 flow [2023-01-27 21:38:26,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4397, PETRI_PLACES=170, PETRI_TRANSITIONS=247} [2023-01-27 21:38:26,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2023-01-27 21:38:26,258 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 247 transitions, 4397 flow [2023-01-27 21:38:26,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.26315789473684) internal successors, (1031), 19 states have internal predecessors, (1031), 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) [2023-01-27 21:38:26,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:26,258 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:26,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 21:38:26,461 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:26,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2063184372, now seen corresponding path program 10 times [2023-01-27 21:38:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:26,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844314354] [2023-01-27 21:38:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844314354] [2023-01-27 21:38:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844314354] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729045812] [2023-01-27 21:38:26,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:38:26,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:26,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:26,555 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:26,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 21:38:26,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:38:26,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:26,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729045812] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:26,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-27 21:38:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516682851] [2023-01-27 21:38:26,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:26,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:38:26,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:38:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:38:26,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:26,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 247 transitions, 4397 flow. Second operand has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 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) [2023-01-27 21:38:26,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:26,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:26,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:27,630 INFO L130 PetriNetUnfolder]: 1647/3340 cut-off events. [2023-01-27 21:38:27,630 INFO L131 PetriNetUnfolder]: For 174080/174080 co-relation queries the response was YES. [2023-01-27 21:38:27,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31526 conditions, 3340 events. 1647/3340 cut-off events. For 174080/174080 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24487 event pairs, 203 based on Foata normal form. 68/3408 useless extension candidates. Maximal degree in co-relation 27779. Up to 1261 conditions per place. [2023-01-27 21:38:27,660 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 450 selfloop transitions, 146 changer transitions 2/598 dead transitions. [2023-01-27 21:38:27,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 598 transitions, 11388 flow [2023-01-27 21:38:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:38:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:38:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1138 transitions. [2023-01-27 21:38:27,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433190494740943 [2023-01-27 21:38:27,662 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1138 transitions. [2023-01-27 21:38:27,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1138 transitions. [2023-01-27 21:38:27,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:27,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1138 transitions. [2023-01-27 21:38:27,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.94117647058823) internal successors, (1138), 17 states have internal predecessors, (1138), 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) [2023-01-27 21:38:27,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 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) [2023-01-27 21:38:27,675 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 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) [2023-01-27 21:38:27,675 INFO L175 Difference]: Start difference. First operand has 170 places, 247 transitions, 4397 flow. Second operand 17 states and 1138 transitions. [2023-01-27 21:38:27,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 598 transitions, 11388 flow [2023-01-27 21:38:27,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 598 transitions, 11113 flow, removed 119 selfloop flow, removed 7 redundant places. [2023-01-27 21:38:27,891 INFO L231 Difference]: Finished difference. Result has 179 places, 361 transitions, 7164 flow [2023-01-27 21:38:27,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7164, PETRI_PLACES=179, PETRI_TRANSITIONS=361} [2023-01-27 21:38:27,892 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-01-27 21:38:27,892 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 361 transitions, 7164 flow [2023-01-27 21:38:27,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 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) [2023-01-27 21:38:27,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:27,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:27,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:28,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 21:38:28,096 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:28,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash -475875398, now seen corresponding path program 11 times [2023-01-27 21:38:28,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:28,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059704891] [2023-01-27 21:38:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059704891] [2023-01-27 21:38:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059704891] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914858506] [2023-01-27 21:38:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:38:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:28,195 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:28,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 21:38:28,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:38:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:28,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:28,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914858506] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:28,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:28,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-27 21:38:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55165636] [2023-01-27 21:38:28,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:28,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:38:28,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:38:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:38:28,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:28,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 361 transitions, 7164 flow. Second operand has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 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) [2023-01-27 21:38:28,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:28,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:28,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:29,911 INFO L130 PetriNetUnfolder]: 1772/3571 cut-off events. [2023-01-27 21:38:29,911 INFO L131 PetriNetUnfolder]: For 183020/183020 co-relation queries the response was YES. [2023-01-27 21:38:29,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34885 conditions, 3571 events. 1772/3571 cut-off events. For 183020/183020 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26445 event pairs, 231 based on Foata normal form. 58/3629 useless extension candidates. Maximal degree in co-relation 31693. Up to 1314 conditions per place. [2023-01-27 21:38:29,943 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 513 selfloop transitions, 195 changer transitions 2/710 dead transitions. [2023-01-27 21:38:29,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 710 transitions, 13680 flow [2023-01-27 21:38:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 21:38:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 21:38:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2316 transitions. [2023-01-27 21:38:29,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382213812677389 [2023-01-27 21:38:29,946 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2316 transitions. [2023-01-27 21:38:29,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2316 transitions. [2023-01-27 21:38:29,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:29,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2316 transitions. [2023-01-27 21:38:29,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.17142857142858) internal successors, (2316), 35 states have internal predecessors, (2316), 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) [2023-01-27 21:38:29,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 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) [2023-01-27 21:38:29,953 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 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) [2023-01-27 21:38:29,953 INFO L175 Difference]: Start difference. First operand has 179 places, 361 transitions, 7164 flow. Second operand 35 states and 2316 transitions. [2023-01-27 21:38:29,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 710 transitions, 13680 flow [2023-01-27 21:38:30,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 710 transitions, 12959 flow, removed 328 selfloop flow, removed 5 redundant places. [2023-01-27 21:38:30,285 INFO L231 Difference]: Finished difference. Result has 219 places, 426 transitions, 8638 flow [2023-01-27 21:38:30,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8638, PETRI_PLACES=219, PETRI_TRANSITIONS=426} [2023-01-27 21:38:30,286 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-01-27 21:38:30,286 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 426 transitions, 8638 flow [2023-01-27 21:38:30,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 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) [2023-01-27 21:38:30,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:30,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:30,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:30,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:30,487 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:30,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1140862416, now seen corresponding path program 12 times [2023-01-27 21:38:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:30,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471701789] [2023-01-27 21:38:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:30,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:30,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471701789] [2023-01-27 21:38:30,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471701789] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:30,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892500510] [2023-01-27 21:38:30,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:38:30,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:30,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:30,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:30,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 21:38:30,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 21:38:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:30,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:30,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892500510] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:30,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:30,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-01-27 21:38:30,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894498676] [2023-01-27 21:38:30,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:30,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:38:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:38:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:38:30,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:30,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 426 transitions, 8638 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 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) [2023-01-27 21:38:30,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:30,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:30,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:33,497 INFO L130 PetriNetUnfolder]: 2172/4396 cut-off events. [2023-01-27 21:38:33,497 INFO L131 PetriNetUnfolder]: For 281276/281276 co-relation queries the response was YES. [2023-01-27 21:38:33,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46183 conditions, 4396 events. 2172/4396 cut-off events. For 281276/281276 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34209 event pairs, 80 based on Foata normal form. 38/4434 useless extension candidates. Maximal degree in co-relation 45755. Up to 1393 conditions per place. [2023-01-27 21:38:33,540 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 301 selfloop transitions, 579 changer transitions 32/912 dead transitions. [2023-01-27 21:38:33,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 912 transitions, 19241 flow [2023-01-27 21:38:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-27 21:38:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-27 21:38:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3928 transitions. [2023-01-27 21:38:33,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335540838852097 [2023-01-27 21:38:33,544 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3928 transitions. [2023-01-27 21:38:33,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3928 transitions. [2023-01-27 21:38:33,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:33,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3928 transitions. [2023-01-27 21:38:33,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 65.46666666666667) internal successors, (3928), 60 states have internal predecessors, (3928), 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) [2023-01-27 21:38:33,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 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) [2023-01-27 21:38:33,623 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 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) [2023-01-27 21:38:33,623 INFO L175 Difference]: Start difference. First operand has 219 places, 426 transitions, 8638 flow. Second operand 60 states and 3928 transitions. [2023-01-27 21:38:33,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 912 transitions, 19241 flow [2023-01-27 21:38:34,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 912 transitions, 18425 flow, removed 353 selfloop flow, removed 10 redundant places. [2023-01-27 21:38:34,285 INFO L231 Difference]: Finished difference. Result has 285 places, 676 transitions, 15440 flow [2023-01-27 21:38:34,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15440, PETRI_PLACES=285, PETRI_TRANSITIONS=676} [2023-01-27 21:38:34,286 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-01-27 21:38:34,286 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 676 transitions, 15440 flow [2023-01-27 21:38:34,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 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) [2023-01-27 21:38:34,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:34,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:34,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:34,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 21:38:34,491 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:34,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash 270066790, now seen corresponding path program 13 times [2023-01-27 21:38:34,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847618872] [2023-01-27 21:38:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:34,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:34,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847618872] [2023-01-27 21:38:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847618872] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038463790] [2023-01-27 21:38:34,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:38:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:34,603 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:34,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 21:38:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:34,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038463790] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:34,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:34,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-27 21:38:34,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489936752] [2023-01-27 21:38:34,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:38:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:38:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:38:34,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:34,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 676 transitions, 15440 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 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) [2023-01-27 21:38:34,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:34,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:34,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:37,267 INFO L130 PetriNetUnfolder]: 2312/4614 cut-off events. [2023-01-27 21:38:37,267 INFO L131 PetriNetUnfolder]: For 486549/486549 co-relation queries the response was YES. [2023-01-27 21:38:37,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 4614 events. 2312/4614 cut-off events. For 486549/486549 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35739 event pairs, 229 based on Foata normal form. 90/4704 useless extension candidates. Maximal degree in co-relation 53799. Up to 1654 conditions per place. [2023-01-27 21:38:37,319 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 569 selfloop transitions, 324 changer transitions 20/913 dead transitions. [2023-01-27 21:38:37,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 913 transitions, 21042 flow [2023-01-27 21:38:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 21:38:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 21:38:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2313 transitions. [2023-01-27 21:38:37,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43765373699148535 [2023-01-27 21:38:37,323 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2313 transitions. [2023-01-27 21:38:37,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2313 transitions. [2023-01-27 21:38:37,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:37,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2313 transitions. [2023-01-27 21:38:37,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.08571428571429) internal successors, (2313), 35 states have internal predecessors, (2313), 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) [2023-01-27 21:38:37,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 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) [2023-01-27 21:38:37,330 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 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) [2023-01-27 21:38:37,330 INFO L175 Difference]: Start difference. First operand has 285 places, 676 transitions, 15440 flow. Second operand 35 states and 2313 transitions. [2023-01-27 21:38:37,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 913 transitions, 21042 flow [2023-01-27 21:38:38,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 18678 flow, removed 1059 selfloop flow, removed 17 redundant places. [2023-01-27 21:38:38,718 INFO L231 Difference]: Finished difference. Result has 307 places, 734 transitions, 15851 flow [2023-01-27 21:38:38,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=13381, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15851, PETRI_PLACES=307, PETRI_TRANSITIONS=734} [2023-01-27 21:38:38,718 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-01-27 21:38:38,718 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 734 transitions, 15851 flow [2023-01-27 21:38:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 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) [2023-01-27 21:38:38,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:38,719 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:38,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:38,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 21:38:38,919 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:38,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1139673124, now seen corresponding path program 14 times [2023-01-27 21:38:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:38,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749742891] [2023-01-27 21:38:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:39,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749742891] [2023-01-27 21:38:39,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749742891] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400255055] [2023-01-27 21:38:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:38:39,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:39,111 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:39,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 21:38:39,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:39,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:39,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400255055] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:39,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:39,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-01-27 21:38:39,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339462790] [2023-01-27 21:38:39,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:39,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:38:39,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:38:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:38:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:39,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 734 transitions, 15851 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 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) [2023-01-27 21:38:39,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:39,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:39,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:41,914 INFO L130 PetriNetUnfolder]: 2324/4664 cut-off events. [2023-01-27 21:38:41,915 INFO L131 PetriNetUnfolder]: For 560320/560320 co-relation queries the response was YES. [2023-01-27 21:38:41,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54453 conditions, 4664 events. 2324/4664 cut-off events. For 560320/560320 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36423 event pairs, 172 based on Foata normal form. 72/4736 useless extension candidates. Maximal degree in co-relation 53939. Up to 1105 conditions per place. [2023-01-27 21:38:41,970 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 374 selfloop transitions, 541 changer transitions 3/918 dead transitions. [2023-01-27 21:38:41,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 918 transitions, 20073 flow [2023-01-27 21:38:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 21:38:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 21:38:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2904 transitions. [2023-01-27 21:38:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2023-01-27 21:38:41,973 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2904 transitions. [2023-01-27 21:38:41,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2904 transitions. [2023-01-27 21:38:41,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:41,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2904 transitions. [2023-01-27 21:38:41,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 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) [2023-01-27 21:38:41,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 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) [2023-01-27 21:38:41,985 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 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) [2023-01-27 21:38:41,985 INFO L175 Difference]: Start difference. First operand has 307 places, 734 transitions, 15851 flow. Second operand 44 states and 2904 transitions. [2023-01-27 21:38:41,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 918 transitions, 20073 flow [2023-01-27 21:38:43,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 918 transitions, 19432 flow, removed 223 selfloop flow, removed 17 redundant places. [2023-01-27 21:38:43,563 INFO L231 Difference]: Finished difference. Result has 343 places, 742 transitions, 16941 flow [2023-01-27 21:38:43,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=15020, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16941, PETRI_PLACES=343, PETRI_TRANSITIONS=742} [2023-01-27 21:38:43,563 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-01-27 21:38:43,564 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 742 transitions, 16941 flow [2023-01-27 21:38:43,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 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) [2023-01-27 21:38:43,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:43,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:43,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-27 21:38:43,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:43,764 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:43,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash -452021610, now seen corresponding path program 15 times [2023-01-27 21:38:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:43,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25248108] [2023-01-27 21:38:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:43,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25248108] [2023-01-27 21:38:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25248108] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814108226] [2023-01-27 21:38:43,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:38:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:43,869 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:43,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 21:38:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 21:38:43,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:43,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:44,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814108226] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:44,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:44,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-27 21:38:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510401779] [2023-01-27 21:38:44,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:44,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:38:44,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:38:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:38:44,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:44,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 742 transitions, 16941 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 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) [2023-01-27 21:38:44,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:44,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:44,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:46,998 INFO L130 PetriNetUnfolder]: 2789/5587 cut-off events. [2023-01-27 21:38:46,998 INFO L131 PetriNetUnfolder]: For 841141/841141 co-relation queries the response was YES. [2023-01-27 21:38:47,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 5587 events. 2789/5587 cut-off events. For 841141/841141 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45175 event pairs, 696 based on Foata normal form. 90/5677 useless extension candidates. Maximal degree in co-relation 68655. Up to 3278 conditions per place. [2023-01-27 21:38:47,067 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 615 selfloop transitions, 410 changer transitions 24/1049 dead transitions. [2023-01-27 21:38:47,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1049 transitions, 25028 flow [2023-01-27 21:38:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 21:38:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 21:38:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2680 transitions. [2023-01-27 21:38:47,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328864480697787 [2023-01-27 21:38:47,070 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2680 transitions. [2023-01-27 21:38:47,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2680 transitions. [2023-01-27 21:38:47,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:47,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2680 transitions. [2023-01-27 21:38:47,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.36585365853658) internal successors, (2680), 41 states have internal predecessors, (2680), 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) [2023-01-27 21:38:47,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 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) [2023-01-27 21:38:47,078 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 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) [2023-01-27 21:38:47,078 INFO L175 Difference]: Start difference. First operand has 343 places, 742 transitions, 16941 flow. Second operand 41 states and 2680 transitions. [2023-01-27 21:38:47,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1049 transitions, 25028 flow [2023-01-27 21:38:49,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1049 transitions, 24238 flow, removed 117 selfloop flow, removed 32 redundant places. [2023-01-27 21:38:49,503 INFO L231 Difference]: Finished difference. Result has 364 places, 865 transitions, 21360 flow [2023-01-27 21:38:49,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=16275, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21360, PETRI_PLACES=364, PETRI_TRANSITIONS=865} [2023-01-27 21:38:49,504 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 344 predicate places. [2023-01-27 21:38:49,504 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 865 transitions, 21360 flow [2023-01-27 21:38:49,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 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) [2023-01-27 21:38:49,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:49,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:49,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-27 21:38:49,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:49,709 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:49,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1486062540, now seen corresponding path program 16 times [2023-01-27 21:38:49,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:49,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285500037] [2023-01-27 21:38:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:49,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285500037] [2023-01-27 21:38:49,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285500037] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119078970] [2023-01-27 21:38:49,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:38:49,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:49,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:49,805 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:49,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 21:38:49,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:38:49,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:49,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:49,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:49,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119078970] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:49,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:49,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-27 21:38:49,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893784860] [2023-01-27 21:38:49,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:38:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:38:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:38:49,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:49,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 865 transitions, 21360 flow. Second operand has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 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) [2023-01-27 21:38:49,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:49,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:49,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:53,159 INFO L130 PetriNetUnfolder]: 3178/6320 cut-off events. [2023-01-27 21:38:53,159 INFO L131 PetriNetUnfolder]: For 1055485/1055485 co-relation queries the response was YES. [2023-01-27 21:38:53,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82781 conditions, 6320 events. 3178/6320 cut-off events. For 1055485/1055485 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 51918 event pairs, 976 based on Foata normal form. 58/6378 useless extension candidates. Maximal degree in co-relation 81829. Up to 4281 conditions per place. [2023-01-27 21:38:53,247 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 854 selfloop transitions, 312 changer transitions 4/1170 dead transitions. [2023-01-27 21:38:53,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1170 transitions, 28762 flow [2023-01-27 21:38:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-27 21:38:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-27 21:38:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2574 transitions. [2023-01-27 21:38:53,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2023-01-27 21:38:53,250 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2574 transitions. [2023-01-27 21:38:53,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2574 transitions. [2023-01-27 21:38:53,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:53,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2574 transitions. [2023-01-27 21:38:53,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 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) [2023-01-27 21:38:53,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 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) [2023-01-27 21:38:53,257 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 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) [2023-01-27 21:38:53,257 INFO L175 Difference]: Start difference. First operand has 364 places, 865 transitions, 21360 flow. Second operand 39 states and 2574 transitions. [2023-01-27 21:38:53,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1170 transitions, 28762 flow [2023-01-27 21:38:56,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1170 transitions, 28239 flow, removed 202 selfloop flow, removed 19 redundant places. [2023-01-27 21:38:56,641 INFO L231 Difference]: Finished difference. Result has 395 places, 969 transitions, 24660 flow [2023-01-27 21:38:56,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=20847, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24660, PETRI_PLACES=395, PETRI_TRANSITIONS=969} [2023-01-27 21:38:56,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-01-27 21:38:56,642 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 969 transitions, 24660 flow [2023-01-27 21:38:56,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 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) [2023-01-27 21:38:56,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:56,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:56,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:56,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:56,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1267300304, now seen corresponding path program 17 times [2023-01-27 21:38:56,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:56,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698472977] [2023-01-27 21:38:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:56,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698472977] [2023-01-27 21:38:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698472977] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952341920] [2023-01-27 21:38:56,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:38:56,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:56,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:56,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 21:38:57,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:38:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:38:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:57,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952341920] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:57,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:57,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-27 21:38:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361031048] [2023-01-27 21:38:57,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:57,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:38:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:38:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:38:57,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:38:57,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 969 transitions, 24660 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 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) [2023-01-27 21:38:57,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:57,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:38:57,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:01,021 INFO L130 PetriNetUnfolder]: 3456/6883 cut-off events. [2023-01-27 21:39:01,021 INFO L131 PetriNetUnfolder]: For 1265975/1265975 co-relation queries the response was YES. [2023-01-27 21:39:01,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93386 conditions, 6883 events. 3456/6883 cut-off events. For 1265975/1265975 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 57290 event pairs, 1244 based on Foata normal form. 56/6939 useless extension candidates. Maximal degree in co-relation 92435. Up to 5461 conditions per place. [2023-01-27 21:39:01,117 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 915 selfloop transitions, 244 changer transitions 24/1183 dead transitions. [2023-01-27 21:39:01,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1183 transitions, 30799 flow [2023-01-27 21:39:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 21:39:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 21:39:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1786 transitions. [2023-01-27 21:39:01,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380672062791268 [2023-01-27 21:39:01,119 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1786 transitions. [2023-01-27 21:39:01,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1786 transitions. [2023-01-27 21:39:01,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:01,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1786 transitions. [2023-01-27 21:39:01,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 66.14814814814815) internal successors, (1786), 27 states have internal predecessors, (1786), 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) [2023-01-27 21:39:01,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 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) [2023-01-27 21:39:01,123 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 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) [2023-01-27 21:39:01,123 INFO L175 Difference]: Start difference. First operand has 395 places, 969 transitions, 24660 flow. Second operand 27 states and 1786 transitions. [2023-01-27 21:39:01,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1183 transitions, 30799 flow [2023-01-27 21:39:05,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1183 transitions, 30022 flow, removed 345 selfloop flow, removed 11 redundant places. [2023-01-27 21:39:05,803 INFO L231 Difference]: Finished difference. Result has 420 places, 1030 transitions, 26451 flow [2023-01-27 21:39:05,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=23839, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26451, PETRI_PLACES=420, PETRI_TRANSITIONS=1030} [2023-01-27 21:39:05,804 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2023-01-27 21:39:05,804 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1030 transitions, 26451 flow [2023-01-27 21:39:05,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 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) [2023-01-27 21:39:05,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:39:05,805 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:39:05,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-27 21:39:06,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-27 21:39:06,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:39:06,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:39:06,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2075125822, now seen corresponding path program 18 times [2023-01-27 21:39:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:39:06,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392523973] [2023-01-27 21:39:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:39:06,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:39:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:39:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:06,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:39:06,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392523973] [2023-01-27 21:39:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392523973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:39:06,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700554687] [2023-01-27 21:39:06,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:39:06,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:39:06,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:39:06,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 21:39:06,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:39:06,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:39:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:39:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:39:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:39:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:06,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700554687] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:39:06,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:39:06,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-27 21:39:06,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307885363] [2023-01-27 21:39:06,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:39:06,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:39:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:39:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:39:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:39:06,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:39:06,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1030 transitions, 26451 flow. Second operand has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 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) [2023-01-27 21:39:06,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:39:06,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:39:06,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:09,984 INFO L130 PetriNetUnfolder]: 3726/7375 cut-off events. [2023-01-27 21:39:09,985 INFO L131 PetriNetUnfolder]: For 1467705/1467705 co-relation queries the response was YES. [2023-01-27 21:39:10,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100365 conditions, 7375 events. 3726/7375 cut-off events. For 1467705/1467705 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61838 event pairs, 1357 based on Foata normal form. 96/7471 useless extension candidates. Maximal degree in co-relation 98807. Up to 6093 conditions per place. [2023-01-27 21:39:10,095 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1043 selfloop transitions, 263 changer transitions 3/1309 dead transitions. [2023-01-27 21:39:10,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1309 transitions, 34648 flow [2023-01-27 21:39:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 21:39:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 21:39:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2372 transitions. [2023-01-27 21:39:10,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43635025754231055 [2023-01-27 21:39:10,099 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2372 transitions. [2023-01-27 21:39:10,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2372 transitions. [2023-01-27 21:39:10,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:10,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2372 transitions. [2023-01-27 21:39:10,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.88888888888889) internal successors, (2372), 36 states have internal predecessors, (2372), 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) [2023-01-27 21:39:10,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 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) [2023-01-27 21:39:10,105 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 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) [2023-01-27 21:39:10,105 INFO L175 Difference]: Start difference. First operand has 420 places, 1030 transitions, 26451 flow. Second operand 36 states and 2372 transitions. [2023-01-27 21:39:10,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1309 transitions, 34648 flow [2023-01-27 21:39:16,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1309 transitions, 33939 flow, removed 279 selfloop flow, removed 12 redundant places. [2023-01-27 21:39:16,195 INFO L231 Difference]: Finished difference. Result has 457 places, 1131 transitions, 29835 flow [2023-01-27 21:39:16,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=25991, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29835, PETRI_PLACES=457, PETRI_TRANSITIONS=1131} [2023-01-27 21:39:16,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-01-27 21:39:16,196 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1131 transitions, 29835 flow [2023-01-27 21:39:16,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 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) [2023-01-27 21:39:16,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:39:16,197 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:39:16,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 21:39:16,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 21:39:16,397 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:39:16,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:39:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2047021096, now seen corresponding path program 19 times [2023-01-27 21:39:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:39:16,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457556816] [2023-01-27 21:39:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:39:16,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:39:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:39:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:16,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:39:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457556816] [2023-01-27 21:39:16,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457556816] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:39:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153662728] [2023-01-27 21:39:16,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:39:16,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:39:16,486 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:39:16,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 21:39:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:39:16,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:39:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:39:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:16,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:39:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:16,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153662728] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:39:16,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:39:16,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-27 21:39:16,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697236806] [2023-01-27 21:39:16,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:39:16,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:39:16,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:39:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:39:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:39:16,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:39:16,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1131 transitions, 29835 flow. Second operand has 16 states, 16 states have (on average 61.8125) internal successors, (989), 16 states have internal predecessors, (989), 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) [2023-01-27 21:39:16,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:39:16,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:39:16,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:20,336 INFO L130 PetriNetUnfolder]: 3929/7754 cut-off events. [2023-01-27 21:39:20,336 INFO L131 PetriNetUnfolder]: For 1847116/1847116 co-relation queries the response was YES. [2023-01-27 21:39:20,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108331 conditions, 7754 events. 3929/7754 cut-off events. For 1847116/1847116 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 65401 event pairs, 1523 based on Foata normal form. 140/7894 useless extension candidates. Maximal degree in co-relation 107213. Up to 6927 conditions per place. [2023-01-27 21:39:20,452 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1158 selfloop transitions, 186 changer transitions 4/1348 dead transitions. [2023-01-27 21:39:20,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1348 transitions, 35943 flow [2023-01-27 21:39:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 21:39:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 21:39:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2368 transitions. [2023-01-27 21:39:20,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43561442236938924 [2023-01-27 21:39:20,459 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2368 transitions. [2023-01-27 21:39:20,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2368 transitions. [2023-01-27 21:39:20,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:20,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2368 transitions. [2023-01-27 21:39:20,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.77777777777777) internal successors, (2368), 36 states have internal predecessors, (2368), 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) [2023-01-27 21:39:20,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 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) [2023-01-27 21:39:20,464 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 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) [2023-01-27 21:39:20,464 INFO L175 Difference]: Start difference. First operand has 457 places, 1131 transitions, 29835 flow. Second operand 36 states and 2368 transitions. [2023-01-27 21:39:20,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1348 transitions, 35943 flow [2023-01-27 21:39:27,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1348 transitions, 34927 flow, removed 427 selfloop flow, removed 15 redundant places. [2023-01-27 21:39:27,536 INFO L231 Difference]: Finished difference. Result has 493 places, 1210 transitions, 31314 flow [2023-01-27 21:39:27,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=28819, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31314, PETRI_PLACES=493, PETRI_TRANSITIONS=1210} [2023-01-27 21:39:27,538 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-01-27 21:39:27,538 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1210 transitions, 31314 flow [2023-01-27 21:39:27,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.8125) internal successors, (989), 16 states have internal predecessors, (989), 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) [2023-01-27 21:39:27,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:39:27,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:39:27,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 21:39:27,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:27,742 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:39:27,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:39:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -447011944, now seen corresponding path program 20 times [2023-01-27 21:39:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:39:27,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495676539] [2023-01-27 21:39:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:39:27,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:39:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:39:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:27,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:39:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495676539] [2023-01-27 21:39:27,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495676539] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:39:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975806179] [2023-01-27 21:39:27,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:39:27,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:39:27,913 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:39:27,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 21:39:27,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:39:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:39:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:39:27,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:39:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:39:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:28,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975806179] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:39:28,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:39:28,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-01-27 21:39:28,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313787833] [2023-01-27 21:39:28,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:39:28,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:39:28,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:39:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:39:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-01-27 21:39:28,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:39:28,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1210 transitions, 31314 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 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) [2023-01-27 21:39:28,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:39:28,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:39:28,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:33,920 INFO L130 PetriNetUnfolder]: 4369/8746 cut-off events. [2023-01-27 21:39:33,921 INFO L131 PetriNetUnfolder]: For 2475670/2475670 co-relation queries the response was YES. [2023-01-27 21:39:34,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129968 conditions, 8746 events. 4369/8746 cut-off events. For 2475670/2475670 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 76357 event pairs, 753 based on Foata normal form. 66/8812 useless extension candidates. Maximal degree in co-relation 128951. Up to 3024 conditions per place. [2023-01-27 21:39:34,053 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 654 selfloop transitions, 859 changer transitions 15/1528 dead transitions. [2023-01-27 21:39:34,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1528 transitions, 41320 flow [2023-01-27 21:39:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:39:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:39:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2276 transitions. [2023-01-27 21:39:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433190494740943 [2023-01-27 21:39:34,056 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2276 transitions. [2023-01-27 21:39:34,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2276 transitions. [2023-01-27 21:39:34,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:34,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2276 transitions. [2023-01-27 21:39:34,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.94117647058823) internal successors, (2276), 34 states have internal predecessors, (2276), 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) [2023-01-27 21:39:34,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 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) [2023-01-27 21:39:34,061 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 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) [2023-01-27 21:39:34,061 INFO L175 Difference]: Start difference. First operand has 493 places, 1210 transitions, 31314 flow. Second operand 34 states and 2276 transitions. [2023-01-27 21:39:34,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1528 transitions, 41320 flow [2023-01-27 21:39:43,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1528 transitions, 39723 flow, removed 731 selfloop flow, removed 10 redundant places. [2023-01-27 21:39:43,044 INFO L231 Difference]: Finished difference. Result has 531 places, 1327 transitions, 36308 flow [2023-01-27 21:39:43,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=30014, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36308, PETRI_PLACES=531, PETRI_TRANSITIONS=1327} [2023-01-27 21:39:43,045 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 511 predicate places. [2023-01-27 21:39:43,045 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1327 transitions, 36308 flow [2023-01-27 21:39:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 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) [2023-01-27 21:39:43,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:39:43,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:39:43,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-27 21:39:43,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:43,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:39:43,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:39:43,250 INFO L85 PathProgramCache]: Analyzing trace with hash -431522972, now seen corresponding path program 21 times [2023-01-27 21:39:43,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:39:43,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664585547] [2023-01-27 21:39:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:39:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:39:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:39:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:39:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664585547] [2023-01-27 21:39:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664585547] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:39:43,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290340385] [2023-01-27 21:39:43,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:39:43,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:43,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:39:43,377 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:39:43,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 21:39:43,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 21:39:43,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:39:43,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:39:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:39:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:43,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:39:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:39:43,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290340385] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:39:43,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:39:43,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-01-27 21:39:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799732691] [2023-01-27 21:39:43,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:39:43,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:39:43,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:39:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:39:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-01-27 21:39:43,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:39:43,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1327 transitions, 36308 flow. Second operand has 21 states, 21 states have (on average 61.57142857142857) internal successors, (1293), 21 states have internal predecessors, (1293), 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) [2023-01-27 21:39:43,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:39:43,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:39:43,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:49,980 INFO L130 PetriNetUnfolder]: 4343/8662 cut-off events. [2023-01-27 21:39:49,981 INFO L131 PetriNetUnfolder]: For 2683576/2683576 co-relation queries the response was YES. [2023-01-27 21:39:50,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137974 conditions, 8662 events. 4343/8662 cut-off events. For 2683576/2683576 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 75308 event pairs, 309 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 136861. Up to 2242 conditions per place. [2023-01-27 21:39:50,129 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 462 selfloop transitions, 1043 changer transitions 20/1525 dead transitions. [2023-01-27 21:39:50,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1525 transitions, 43576 flow [2023-01-27 21:39:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-01-27 21:39:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-01-27 21:39:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3426 transitions. [2023-01-27 21:39:50,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280894664500812 [2023-01-27 21:39:50,132 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3426 transitions. [2023-01-27 21:39:50,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3426 transitions. [2023-01-27 21:39:50,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:50,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3426 transitions. [2023-01-27 21:39:50,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 64.64150943396227) internal successors, (3426), 53 states have internal predecessors, (3426), 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) [2023-01-27 21:39:50,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 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) [2023-01-27 21:39:50,140 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 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) [2023-01-27 21:39:50,140 INFO L175 Difference]: Start difference. First operand has 531 places, 1327 transitions, 36308 flow. Second operand 53 states and 3426 transitions. [2023-01-27 21:39:50,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1525 transitions, 43576 flow [2023-01-27 21:40:01,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1525 transitions, 42749 flow, removed 368 selfloop flow, removed 14 redundant places. [2023-01-27 21:40:01,308 INFO L231 Difference]: Finished difference. Result has 576 places, 1372 transitions, 39675 flow [2023-01-27 21:40:01,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=35525, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=39675, PETRI_PLACES=576, PETRI_TRANSITIONS=1372} [2023-01-27 21:40:01,309 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-01-27 21:40:01,309 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1372 transitions, 39675 flow [2023-01-27 21:40:01,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.57142857142857) internal successors, (1293), 21 states have internal predecessors, (1293), 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) [2023-01-27 21:40:01,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:40:01,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:40:01,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 21:40:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 21:40:01,510 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:40:01,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:40:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1260313288, now seen corresponding path program 22 times [2023-01-27 21:40:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:40:01,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732070815] [2023-01-27 21:40:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:40:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:40:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:40:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:01,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:40:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732070815] [2023-01-27 21:40:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732070815] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:40:01,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401635768] [2023-01-27 21:40:01,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:40:01,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:40:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:40:01,602 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:40:01,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 21:40:01,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:40:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:40:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:40:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:40:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:01,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:40:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:01,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401635768] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:40:01,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:40:01,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-27 21:40:01,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152730505] [2023-01-27 21:40:01,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:40:01,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:40:01,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:40:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:40:01,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:40:01,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:40:01,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1372 transitions, 39675 flow. Second operand has 17 states, 17 states have (on average 61.705882352941174) internal successors, (1049), 17 states have internal predecessors, (1049), 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) [2023-01-27 21:40:01,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:40:01,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:40:01,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:40:07,233 INFO L130 PetriNetUnfolder]: 4554/9035 cut-off events. [2023-01-27 21:40:07,233 INFO L131 PetriNetUnfolder]: For 2969489/2969489 co-relation queries the response was YES. [2023-01-27 21:40:07,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145649 conditions, 9035 events. 4554/9035 cut-off events. For 2969489/2969489 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 78522 event pairs, 1398 based on Foata normal form. 70/9105 useless extension candidates. Maximal degree in co-relation 144763. Up to 6692 conditions per place. [2023-01-27 21:40:07,390 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1085 selfloop transitions, 463 changer transitions 21/1569 dead transitions. [2023-01-27 21:40:07,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1569 transitions, 47022 flow [2023-01-27 21:40:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 21:40:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 21:40:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1911 transitions. [2023-01-27 21:40:07,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43640100479561544 [2023-01-27 21:40:07,392 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1911 transitions. [2023-01-27 21:40:07,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1911 transitions. [2023-01-27 21:40:07,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:40:07,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1911 transitions. [2023-01-27 21:40:07,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.89655172413794) internal successors, (1911), 29 states have internal predecessors, (1911), 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) [2023-01-27 21:40:07,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 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) [2023-01-27 21:40:07,396 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 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) [2023-01-27 21:40:07,396 INFO L175 Difference]: Start difference. First operand has 576 places, 1372 transitions, 39675 flow. Second operand 29 states and 1911 transitions. [2023-01-27 21:40:07,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1569 transitions, 47022 flow [2023-01-27 21:40:20,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1569 transitions, 44869 flow, removed 842 selfloop flow, removed 19 redundant places. [2023-01-27 21:40:20,436 INFO L231 Difference]: Finished difference. Result has 592 places, 1442 transitions, 41737 flow [2023-01-27 21:40:20,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=37992, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41737, PETRI_PLACES=592, PETRI_TRANSITIONS=1442} [2023-01-27 21:40:20,436 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2023-01-27 21:40:20,437 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1442 transitions, 41737 flow [2023-01-27 21:40:20,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.705882352941174) internal successors, (1049), 17 states have internal predecessors, (1049), 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) [2023-01-27 21:40:20,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:40:20,437 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:40:20,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 21:40:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 21:40:20,637 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:40:20,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:40:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1434236764, now seen corresponding path program 23 times [2023-01-27 21:40:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:40:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289016192] [2023-01-27 21:40:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:40:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:40:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:40:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:40:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289016192] [2023-01-27 21:40:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289016192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:40:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729778207] [2023-01-27 21:40:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:40:20,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:40:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:40:20,759 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:40:20,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 21:40:20,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:40:20,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:40:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 21:40:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:40:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:40:20,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:40:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:40:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729778207] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:40:20,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:40:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-27 21:40:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908825904] [2023-01-27 21:40:20,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:40:20,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:40:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:40:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:40:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:40:20,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-01-27 21:40:20,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1442 transitions, 41737 flow. Second operand has 13 states, 13 states have (on average 64.46153846153847) internal successors, (838), 13 states have internal predecessors, (838), 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) [2023-01-27 21:40:20,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:40:20,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-01-27 21:40:20,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:40:26,783 INFO L130 PetriNetUnfolder]: 5686/11328 cut-off events. [2023-01-27 21:40:26,783 INFO L131 PetriNetUnfolder]: For 3857478/3857478 co-relation queries the response was YES. [2023-01-27 21:40:26,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191662 conditions, 11328 events. 5686/11328 cut-off events. For 3857478/3857478 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 102236 event pairs, 603 based on Foata normal form. 194/11522 useless extension candidates. Maximal degree in co-relation 190401. Up to 5610 conditions per place. [2023-01-27 21:40:26,989 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1065 selfloop transitions, 701 changer transitions 149/1917 dead transitions. [2023-01-27 21:40:26,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1917 transitions, 59403 flow [2023-01-27 21:40:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:40:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:40:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 495 transitions. [2023-01-27 21:40:26,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46830652790917693 [2023-01-27 21:40:26,990 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 495 transitions. [2023-01-27 21:40:26,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 495 transitions. [2023-01-27 21:40:26,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:40:26,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 495 transitions. [2023-01-27 21:40:26,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.71428571428571) internal successors, (495), 7 states have internal predecessors, (495), 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) [2023-01-27 21:40:26,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 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) [2023-01-27 21:40:26,992 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 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) [2023-01-27 21:40:26,992 INFO L175 Difference]: Start difference. First operand has 592 places, 1442 transitions, 41737 flow. Second operand 7 states and 495 transitions. [2023-01-27 21:40:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1917 transitions, 59403 flow [2023-01-27 21:40:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1917 transitions, 58893 flow, removed 167 selfloop flow, removed 19 redundant places. [2023-01-27 21:40:43,732 INFO L231 Difference]: Finished difference. Result has 580 places, 1641 transitions, 52029 flow [2023-01-27 21:40:43,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=41214, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52029, PETRI_PLACES=580, PETRI_TRANSITIONS=1641} [2023-01-27 21:40:43,733 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-01-27 21:40:43,733 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1641 transitions, 52029 flow [2023-01-27 21:40:43,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 64.46153846153847) internal successors, (838), 13 states have internal predecessors, (838), 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) [2023-01-27 21:40:43,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:40:43,733 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:40:43,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 21:40:43,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 21:40:43,938 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:40:43,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:40:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash -145152391, now seen corresponding path program 24 times [2023-01-27 21:40:43,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:40:43,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828545749] [2023-01-27 21:40:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:40:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:40:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:40:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:44,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:40:44,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828545749] [2023-01-27 21:40:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828545749] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:40:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231883821] [2023-01-27 21:40:44,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:40:44,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:40:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:40:44,055 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:40:44,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 21:40:44,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:40:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:40:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:40:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:40:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:44,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:40:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231883821] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:40:44,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:40:44,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-01-27 21:40:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105861589] [2023-01-27 21:40:44,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:40:44,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:40:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:40:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:40:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:40:44,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:40:44,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1641 transitions, 52029 flow. Second operand has 19 states, 19 states have (on average 61.94736842105263) internal successors, (1177), 19 states have internal predecessors, (1177), 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) [2023-01-27 21:40:44,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:40:44,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:40:44,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:40:55,885 INFO L130 PetriNetUnfolder]: 9340/18621 cut-off events. [2023-01-27 21:40:55,885 INFO L131 PetriNetUnfolder]: For 6470012/6470012 co-relation queries the response was YES. [2023-01-27 21:40:56,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314644 conditions, 18621 events. 9340/18621 cut-off events. For 6470012/6470012 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 179437 event pairs, 1197 based on Foata normal form. 166/18787 useless extension candidates. Maximal degree in co-relation 312947. Up to 6831 conditions per place. [2023-01-27 21:40:56,256 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2495 selfloop transitions, 630 changer transitions 2/3127 dead transitions. [2023-01-27 21:40:56,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 3127 transitions, 101680 flow [2023-01-27 21:40:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 21:40:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 21:40:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1739 transitions. [2023-01-27 21:40:56,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44294447274579724 [2023-01-27 21:40:56,258 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1739 transitions. [2023-01-27 21:40:56,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1739 transitions. [2023-01-27 21:40:56,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:40:56,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1739 transitions. [2023-01-27 21:40:56,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.88461538461539) internal successors, (1739), 26 states have internal predecessors, (1739), 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) [2023-01-27 21:40:56,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 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) [2023-01-27 21:40:56,261 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 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) [2023-01-27 21:40:56,261 INFO L175 Difference]: Start difference. First operand has 580 places, 1641 transitions, 52029 flow. Second operand 26 states and 1739 transitions. [2023-01-27 21:40:56,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 3127 transitions, 101680 flow [2023-01-27 21:41:28,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 3127 transitions, 100162 flow, removed 692 selfloop flow, removed 16 redundant places. [2023-01-27 21:41:28,898 INFO L231 Difference]: Finished difference. Result has 582 places, 2016 transitions, 64382 flow [2023-01-27 21:41:28,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=51163, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=64382, PETRI_PLACES=582, PETRI_TRANSITIONS=2016} [2023-01-27 21:41:28,899 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-01-27 21:41:28,899 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2016 transitions, 64382 flow [2023-01-27 21:41:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.94736842105263) internal successors, (1177), 19 states have internal predecessors, (1177), 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) [2023-01-27 21:41:28,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:41:28,900 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:41:28,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 21:41:29,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 21:41:29,104 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:41:29,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:41:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2084131937, now seen corresponding path program 25 times [2023-01-27 21:41:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:41:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889741265] [2023-01-27 21:41:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:41:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:41:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:41:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:41:29,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:41:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889741265] [2023-01-27 21:41:29,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889741265] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:41:29,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617581098] [2023-01-27 21:41:29,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:41:29,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:41:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:41:29,237 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:41:29,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 21:41:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:41:29,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:41:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:41:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:41:29,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:41:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:41:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617581098] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:41:29,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:41:29,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-01-27 21:41:29,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081327682] [2023-01-27 21:41:29,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:41:29,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:41:29,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:41:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:41:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:41:29,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:41:29,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2016 transitions, 64382 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 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) [2023-01-27 21:41:29,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:41:29,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:41:29,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:42:37,221 INFO L130 PetriNetUnfolder]: 10436/21121 cut-off events. [2023-01-27 21:42:37,221 INFO L131 PetriNetUnfolder]: For 7299485/7299485 co-relation queries the response was YES. [2023-01-27 21:42:37,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377370 conditions, 21121 events. 10436/21121 cut-off events. For 7299485/7299485 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 210437 event pairs, 326 based on Foata normal form. 84/21205 useless extension candidates. Maximal degree in co-relation 375631. Up to 4533 conditions per place. [2023-01-27 21:42:37,667 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 785 selfloop transitions, 2966 changer transitions 72/3823 dead transitions. [2023-01-27 21:42:37,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 3823 transitions, 129828 flow [2023-01-27 21:42:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-01-27 21:42:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-01-27 21:42:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 7224 transitions. [2023-01-27 21:42:37,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43491872366044554 [2023-01-27 21:42:37,672 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 7224 transitions. [2023-01-27 21:42:37,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 7224 transitions. [2023-01-27 21:42:37,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:42:37,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 7224 transitions. [2023-01-27 21:42:37,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 65.67272727272727) internal successors, (7224), 110 states have internal predecessors, (7224), 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) [2023-01-27 21:42:37,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 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) [2023-01-27 21:42:37,686 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 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) [2023-01-27 21:42:37,686 INFO L175 Difference]: Start difference. First operand has 582 places, 2016 transitions, 64382 flow. Second operand 110 states and 7224 transitions. [2023-01-27 21:42:37,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 3823 transitions, 129828 flow [2023-01-27 21:43:22,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 3823 transitions, 127564 flow, removed 1034 selfloop flow, removed 10 redundant places. [2023-01-27 21:43:22,368 INFO L231 Difference]: Finished difference. Result has 718 places, 3250 transitions, 115680 flow [2023-01-27 21:43:22,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=62622, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=115680, PETRI_PLACES=718, PETRI_TRANSITIONS=3250} [2023-01-27 21:43:22,370 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 698 predicate places. [2023-01-27 21:43:22,370 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 3250 transitions, 115680 flow [2023-01-27 21:43:22,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 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) [2023-01-27 21:43:22,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:43:22,370 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:43:22,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 21:43:22,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:43:22,571 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:43:22,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:43:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1255341621, now seen corresponding path program 26 times [2023-01-27 21:43:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:43:22,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128786901] [2023-01-27 21:43:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:43:22,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:43:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:43:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:43:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:43:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128786901] [2023-01-27 21:43:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128786901] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:43:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234248187] [2023-01-27 21:43:22,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:43:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:43:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:43:22,697 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:43:22,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 21:43:22,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:43:22,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:43:22,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:43:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:43:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:43:22,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:43:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:43:22,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234248187] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:43:22,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:43:22,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-01-27 21:43:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708386166] [2023-01-27 21:43:22,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:43:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:43:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:43:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:43:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:43:22,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:43:22,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 3250 transitions, 115680 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 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) [2023-01-27 21:43:22,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:43:22,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:43:22,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:44:00,135 INFO L130 PetriNetUnfolder]: 12396/25172 cut-off events. [2023-01-27 21:44:00,135 INFO L131 PetriNetUnfolder]: For 17524168/17524168 co-relation queries the response was YES. [2023-01-27 21:44:00,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517059 conditions, 25172 events. 12396/25172 cut-off events. For 17524168/17524168 co-relation queries the response was YES. Maximal size of possible extension queue 1852. Compared 257407 event pairs, 1257 based on Foata normal form. 630/25802 useless extension candidates. Maximal degree in co-relation 514695. Up to 5707 conditions per place. [2023-01-27 21:44:00,882 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2437 selfloop transitions, 1987 changer transitions 90/4514 dead transitions. [2023-01-27 21:44:00,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4514 transitions, 161950 flow [2023-01-27 21:44:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-01-27 21:44:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-01-27 21:44:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4961 transitions. [2023-01-27 21:44:00,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43805739514348785 [2023-01-27 21:44:00,886 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4961 transitions. [2023-01-27 21:44:00,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4961 transitions. [2023-01-27 21:44:00,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:44:00,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4961 transitions. [2023-01-27 21:44:00,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 66.14666666666666) internal successors, (4961), 75 states have internal predecessors, (4961), 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) [2023-01-27 21:44:00,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 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) [2023-01-27 21:44:00,895 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 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) [2023-01-27 21:44:00,895 INFO L175 Difference]: Start difference. First operand has 718 places, 3250 transitions, 115680 flow. Second operand 75 states and 4961 transitions. [2023-01-27 21:44:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4514 transitions, 161950 flow [2023-01-27 21:46:44,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 4514 transitions, 145713 flow, removed 7641 selfloop flow, removed 26 redundant places. [2023-01-27 21:46:44,527 INFO L231 Difference]: Finished difference. Result has 800 places, 3816 transitions, 129047 flow [2023-01-27 21:46:44,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=103467, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=129047, PETRI_PLACES=800, PETRI_TRANSITIONS=3816} [2023-01-27 21:46:44,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 780 predicate places. [2023-01-27 21:46:44,530 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 3816 transitions, 129047 flow [2023-01-27 21:46:44,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 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) [2023-01-27 21:46:44,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:46:44,530 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:46:44,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 21:46:44,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:46:44,741 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:46:44,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:46:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2082942645, now seen corresponding path program 27 times [2023-01-27 21:46:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:46:44,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470313964] [2023-01-27 21:46:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:46:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:46:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:46:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:46:44,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:46:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470313964] [2023-01-27 21:46:44,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470313964] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:46:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381383999] [2023-01-27 21:46:44,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:46:44,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:46:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:46:44,865 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:46:44,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 21:46:44,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 21:46:44,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:46:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:46:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:46:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:46:45,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:46:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:46:45,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381383999] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:46:45,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:46:45,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-01-27 21:46:45,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099020134] [2023-01-27 21:46:45,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:46:45,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:46:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:46:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:46:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:46:45,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:46:45,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 3816 transitions, 129047 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 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) [2023-01-27 21:46:45,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:46:45,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:46:45,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:46:48,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 21:46:53,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 21:46:59,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 21:47:49,678 INFO L130 PetriNetUnfolder]: 13513/27724 cut-off events. [2023-01-27 21:47:49,678 INFO L131 PetriNetUnfolder]: For 22557471/22557471 co-relation queries the response was YES. [2023-01-27 21:47:50,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608346 conditions, 27724 events. 13513/27724 cut-off events. For 22557471/22557471 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 288363 event pairs, 840 based on Foata normal form. 246/27970 useless extension candidates. Maximal degree in co-relation 606659. Up to 5845 conditions per place. [2023-01-27 21:47:50,428 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1506 selfloop transitions, 3187 changer transitions 25/4718 dead transitions. [2023-01-27 21:47:50,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 4718 transitions, 162420 flow [2023-01-27 21:47:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-01-27 21:47:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-01-27 21:47:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 6506 transitions. [2023-01-27 21:47:50,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396540072982836 [2023-01-27 21:47:50,433 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 6506 transitions. [2023-01-27 21:47:50,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 6506 transitions. [2023-01-27 21:47:50,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:47:50,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 6506 transitions. [2023-01-27 21:47:50,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 66.38775510204081) internal successors, (6506), 98 states have internal predecessors, (6506), 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) [2023-01-27 21:47:50,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 151.0) internal successors, (14949), 99 states have internal predecessors, (14949), 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) [2023-01-27 21:47:50,444 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 151.0) internal successors, (14949), 99 states have internal predecessors, (14949), 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) [2023-01-27 21:47:50,445 INFO L175 Difference]: Start difference. First operand has 800 places, 3816 transitions, 129047 flow. Second operand 98 states and 6506 transitions. [2023-01-27 21:47:50,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 4718 transitions, 162420 flow [2023-01-27 21:50:48,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 4718 transitions, 157275 flow, removed 2060 selfloop flow, removed 24 redundant places. [2023-01-27 21:50:48,105 INFO L231 Difference]: Finished difference. Result has 896 places, 4087 transitions, 140962 flow [2023-01-27 21:50:48,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=123676, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2909, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=140962, PETRI_PLACES=896, PETRI_TRANSITIONS=4087} [2023-01-27 21:50:48,107 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 876 predicate places. [2023-01-27 21:50:48,108 INFO L495 AbstractCegarLoop]: Abstraction has has 896 places, 4087 transitions, 140962 flow [2023-01-27 21:50:48,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 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) [2023-01-27 21:50:48,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:50:48,108 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:50:48,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 21:50:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 21:50:48,312 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:50:48,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:50:48,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1186604545, now seen corresponding path program 28 times [2023-01-27 21:50:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:50:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44901258] [2023-01-27 21:50:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:50:48,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:50:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:50:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:50:48,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:50:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44901258] [2023-01-27 21:50:48,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44901258] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:50:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663954619] [2023-01-27 21:50:48,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:50:48,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:50:48,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:50:48,430 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:50:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 21:50:48,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:50:48,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:50:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:50:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:50:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:50:48,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:50:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:50:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663954619] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:50:48,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:50:48,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-01-27 21:50:48,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53892322] [2023-01-27 21:50:48,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:50:48,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:50:48,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:50:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:50:48,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-01-27 21:50:48,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-27 21:50:48,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 896 places, 4087 transitions, 140962 flow. Second operand has 21 states, 21 states have (on average 61.666666666666664) internal successors, (1295), 21 states have internal predecessors, (1295), 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) [2023-01-27 21:50:48,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:50:48,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-27 21:50:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:51:52,224 INFO L130 PetriNetUnfolder]: 13872/28369 cut-off events. [2023-01-27 21:51:52,224 INFO L131 PetriNetUnfolder]: For 28784286/28784286 co-relation queries the response was YES. [2023-01-27 21:51:52,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662689 conditions, 28369 events. 13872/28369 cut-off events. For 28784286/28784286 co-relation queries the response was YES. Maximal size of possible extension queue 2008. Compared 295078 event pairs, 2077 based on Foata normal form. 188/28557 useless extension candidates. Maximal degree in co-relation 660843. Up to 12337 conditions per place. [2023-01-27 21:51:53,049 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 3455 selfloop transitions, 1195 changer transitions 46/4696 dead transitions. [2023-01-27 21:51:53,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 4696 transitions, 164323 flow [2023-01-27 21:51:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-01-27 21:51:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-01-27 21:51:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4232 transitions. [2023-01-27 21:51:53,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379139072847682 [2023-01-27 21:51:53,052 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4232 transitions. [2023-01-27 21:51:53,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4232 transitions. [2023-01-27 21:51:53,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:51:53,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4232 transitions. [2023-01-27 21:51:53,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 66.125) internal successors, (4232), 64 states have internal predecessors, (4232), 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) [2023-01-27 21:51:53,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 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) [2023-01-27 21:51:53,060 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 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) [2023-01-27 21:51:53,060 INFO L175 Difference]: Start difference. First operand has 896 places, 4087 transitions, 140962 flow. Second operand 64 states and 4232 transitions. [2023-01-27 21:51:53,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 4696 transitions, 164323 flow Received shutdown request... [2023-01-27 21:52:21,733 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 21:52:21,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 21:52:21,739 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 21:52:21,739 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 21:52:21,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:52:21,934 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 21:52:21,935 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 21:52:21,936 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 21:52:21,936 INFO L445 BasicCegarLoop]: Path program histogram: [28, 4, 1] [2023-01-27 21:52:21,938 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 21:52:21,938 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 21:52:21,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 09:52:21 BasicIcfg [2023-01-27 21:52:21,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 21:52:21,941 INFO L158 Benchmark]: Toolchain (without parser) took 848811.50ms. Allocated memory was 369.1MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 337.9MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. [2023-01-27 21:52:21,941 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:52:21,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.75ms. Allocated memory is still 369.1MB. Free memory was 337.5MB in the beginning and 326.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 21:52:21,941 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.28ms. Allocated memory is still 369.1MB. Free memory was 326.9MB in the beginning and 325.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:52:21,941 INFO L158 Benchmark]: Boogie Preprocessor took 13.90ms. Allocated memory is still 369.1MB. Free memory was 325.3MB in the beginning and 324.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:52:21,941 INFO L158 Benchmark]: RCFGBuilder took 340.52ms. Allocated memory is still 369.1MB. Free memory was 324.1MB in the beginning and 310.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 21:52:21,942 INFO L158 Benchmark]: TraceAbstraction took 848281.21ms. Allocated memory was 369.1MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 309.4MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. [2023-01-27 21:52:21,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 152.75ms. Allocated memory is still 369.1MB. Free memory was 337.5MB in the beginning and 326.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 19.28ms. Allocated memory is still 369.1MB. Free memory was 326.9MB in the beginning and 325.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.90ms. Allocated memory is still 369.1MB. Free memory was 325.3MB in the beginning and 324.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 340.52ms. Allocated memory is still 369.1MB. Free memory was 324.1MB in the beginning and 310.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 848281.21ms. Allocated memory was 369.1MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 309.4MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 73 PlacesBefore, 20 PlacesAfterwards, 72 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 38 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 69 TotalNumberOfCompositions, 583 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 563, independent: 559, independent conditional: 0, independent unconditional: 559, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 283, independent: 281, independent conditional: 0, independent unconditional: 281, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 563, independent: 278, independent conditional: 0, independent unconditional: 278, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 283, unknown conditional: 0, unknown unconditional: 283] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 97 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 848.2s, OverallIterations: 33, TraceHistogramMax: 4, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 830.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 6498 SdHoareTripleChecker+Valid, 24.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6498 mSDsluCounter, 583 SdHoareTripleChecker+Invalid, 22.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 443 mSDsCounter, 938 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19747 IncrementalHoareTripleChecker+Invalid, 20686 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 938 mSolverCounterUnsat, 140 mSDtfsCounter, 19747 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2799 GetRequests, 1523 SyntacticMatches, 55 SemanticMatches, 1221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23080 ImplicationChecksByTransitivity, 107.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=140962occurred in iteration=32, InterpolantAutomatonStates: 979, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 1105 NumberOfCodeBlocks, 1105 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 1549 ConstructedInterpolants, 0 QuantifiedInterpolants, 9495 SizeOfPredicates, 65 NumberOfNonLiveVariables, 4329 ConjunctsInSsa, 420 ConjunctsInUnsatCore, 95 InterpolantComputations, 3 PerfectInterpolantSequences, 73/745 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown