/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:53:39,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:53:39,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:53:39,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-27 23:53:39,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:53:39,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:53:39,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:53:39,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:53:39,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:53:39,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:53:39,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:53:39,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:53:39,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:53:39,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:53:39,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:53:39,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:53:39,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 23:53:39,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:53:39,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:53:39,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:53:39,467 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 23:53:39,484 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:53:39,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:53:39,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:53:39,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:53:39,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:53:39,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:53:39,486 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:53:39,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:53:39,486 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:53:39,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:53:39,487 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:53:39,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:53:39,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:53:39,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:53:39,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:53:39,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:53:39,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:53:39,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:53:39,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:53:39,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:53:39,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:53:39,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:53:39,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:53:39,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:53:39,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-27 23:53:39,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:53:39,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:53:39,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:53:39,682 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:53:39,682 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:53:39,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-01-27 23:53:40,702 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:53:40,889 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:53:40,889 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-01-27 23:53:40,911 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4573b00b/89cf86c1576e41948691f5e079704f82/FLAGcf08e70c1 [2023-01-27 23:53:40,928 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4573b00b/89cf86c1576e41948691f5e079704f82 [2023-01-27 23:53:40,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:53:40,931 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:53:40,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:53:40,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:53:40,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:53:40,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:53:40" (1/1) ... [2023-01-27 23:53:40,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30307dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:40, skipping insertion in model container [2023-01-27 23:53:40,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:53:40" (1/1) ... [2023-01-27 23:53:40,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:53:40,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:53:41,241 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2023-01-27 23:53:41,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:53:41,252 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:53:41,303 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2023-01-27 23:53:41,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:53:41,361 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:53:41,361 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:53:41,367 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:53:41,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41 WrapperNode [2023-01-27 23:53:41,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:53:41,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:53:41,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:53:41,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:53:41,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,407 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-01-27 23:53:41,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:53:41,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:53:41,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:53:41,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:53:41,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:53:41,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:53:41,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:53:41,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:53:41,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (1/1) ... [2023-01-27 23:53:41,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:53:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:41,482 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 23:53:41,497 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 23:53:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 23:53:41,516 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 23:53:41,517 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 23:53:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:53:41,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:53:41,519 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 23:53:41,683 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:53:41,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:53:41,843 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:53:41,847 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:53:41,847 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 23:53:41,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:53:41 BoogieIcfgContainer [2023-01-27 23:53:41,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:53:41,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:53:41,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:53:41,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:53:41,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:53:40" (1/3) ... [2023-01-27 23:53:41,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a9d0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:53:41, skipping insertion in model container [2023-01-27 23:53:41,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:53:41" (2/3) ... [2023-01-27 23:53:41,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a9d0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:53:41, skipping insertion in model container [2023-01-27 23:53:41,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:53:41" (3/3) ... [2023-01-27 23:53:41,855 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-01-27 23:53:41,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:53:41,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:53:41,871 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:53:41,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 23:53:41,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-01-27 23:53:41,993 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-27 23:53:41,993 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:53:41,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-27 23:53:41,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-01-27 23:53:42,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:42,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:53:42,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:42,016 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:42,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-01-27 23:53:42,045 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-27 23:53:42,045 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:53:42,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-27 23:53:42,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-01-27 23:53:43,795 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-01-27 23:53:43,795 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-01-27 23:53:43,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:53:43,813 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;@62f65877, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:53:43,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:53:43,817 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-27 23:53:43,817 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:53:43,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:43,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 23:53:43,819 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 23:53:43,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-01-27 23:53:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764004266] [2023-01-27 23:53:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:44,200 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 23:53:44,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:44,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764004266] [2023-01-27 23:53:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764004266] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:44,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:44,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:53:44,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920964114] [2023-01-27 23:53:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:44,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:53:44,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:53:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:53:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:44,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 23:53:44,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:44,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:44,317 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-01-27 23:53:44,317 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:53:44,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-01-27 23:53:44,319 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-01-27 23:53:44,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-01-27 23:53:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:53:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:53:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-01-27 23:53:44,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2023-01-27 23:53:44,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-01-27 23:53:44,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-01-27 23:53:44,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:44,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-01-27 23:53:44,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 23:53:44,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 23:53:44,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 23:53:44,342 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 233 transitions. [2023-01-27 23:53:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-01-27 23:53:44,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 23:53:44,345 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-01-27 23:53:44,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-01-27 23:53:44,349 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-01-27 23:53:44,349 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-01-27 23:53:44,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 23:53:44,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:44,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:44,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:53:44,350 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 23:53:44,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-01-27 23:53:44,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:44,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321706186] [2023-01-27 23:53:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:44,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:44,448 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 23:53:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321706186] [2023-01-27 23:53:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321706186] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:44,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:44,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:53:44,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130983326] [2023-01-27 23:53:44,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:44,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:53:44,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:53:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:53:44,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:44,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 23:53:44,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:44,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:44,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:44,522 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-01-27 23:53:44,522 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-01-27 23:53:44,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-01-27 23:53:44,525 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-01-27 23:53:44,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-01-27 23:53:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:53:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:53:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2023-01-27 23:53:44,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-01-27 23:53:44,528 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2023-01-27 23:53:44,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2023-01-27 23:53:44,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:44,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2023-01-27 23:53:44,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 23:53:44,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 23:53:44,532 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 23:53:44,532 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 344 transitions. [2023-01-27 23:53:44,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-01-27 23:53:44,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 23:53:44,534 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-01-27 23:53:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-01-27 23:53:44,535 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-01-27 23:53:44,535 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-01-27 23:53:44,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 23:53:44,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:44,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:44,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:53:44,536 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 23:53:44,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:44,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-01-27 23:53:44,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:44,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492624773] [2023-01-27 23:53:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:44,618 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 23:53:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:44,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492624773] [2023-01-27 23:53:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492624773] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:44,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:44,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:53:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870858373] [2023-01-27 23:53:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:53:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:53:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:53:44,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:44,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 23:53:44,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:44,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:44,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:44,715 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2023-01-27 23:53:44,715 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-01-27 23:53:44,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 630 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 636. Up to 84 conditions per place. [2023-01-27 23:53:44,717 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-01-27 23:53:44,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-01-27 23:53:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:53:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:53:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 288 transitions. [2023-01-27 23:53:44,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2023-01-27 23:53:44,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 288 transitions. [2023-01-27 23:53:44,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 288 transitions. [2023-01-27 23:53:44,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:44,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 288 transitions. [2023-01-27 23:53:44,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 23:53:44,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 23:53:44,728 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 23:53:44,728 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 5 states and 288 transitions. [2023-01-27 23:53:44,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-01-27 23:53:44,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 23:53:44,735 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 182 flow [2023-01-27 23:53:44,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-01-27 23:53:44,736 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 17 predicate places. [2023-01-27 23:53:44,740 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 182 flow [2023-01-27 23:53:44,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 23:53:44,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:44,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:44,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:53:44,741 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 23:53:44,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1601852847, now seen corresponding path program 1 times [2023-01-27 23:53:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:44,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430844495] [2023-01-27 23:53:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:44,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:44,864 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 23:53:44,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430844495] [2023-01-27 23:53:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430844495] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:44,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:44,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:53:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236539049] [2023-01-27 23:53:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:53:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:44,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:53:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:53:44,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:44,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 23:53:44,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:44,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:44,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:45,025 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-01-27 23:53:45,025 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2023-01-27 23:53:45,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 706 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 772. Up to 86 conditions per place. [2023-01-27 23:53:45,031 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-01-27 23:53:45,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 425 flow [2023-01-27 23:53:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:53:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:53:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 511 transitions. [2023-01-27 23:53:45,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578853046594982 [2023-01-27 23:53:45,034 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 511 transitions. [2023-01-27 23:53:45,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 511 transitions. [2023-01-27 23:53:45,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:45,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 511 transitions. [2023-01-27 23:53:45,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.77777777777778) internal successors, (511), 9 states have internal predecessors, (511), 0 states have call successors, (0), 0 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 23:53:45,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 23:53:45,048 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 23:53:45,048 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 182 flow. Second operand 9 states and 511 transitions. [2023-01-27 23:53:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 425 flow [2023-01-27 23:53:45,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 388 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-27 23:53:45,055 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 251 flow [2023-01-27 23:53:45,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-01-27 23:53:45,056 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2023-01-27 23:53:45,056 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 251 flow [2023-01-27 23:53:45,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 23:53:45,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:45,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:45,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 23:53:45,057 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 23:53:45,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 2 times [2023-01-27 23:53:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:45,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693304385] [2023-01-27 23:53:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:45,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:45,155 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 23:53:45,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:45,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693304385] [2023-01-27 23:53:45,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693304385] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:45,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:45,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:53:45,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979893549] [2023-01-27 23:53:45,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:45,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:53:45,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:53:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:53:45,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:45,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 23:53:45,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:45,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:45,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:45,253 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-01-27 23:53:45,253 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2023-01-27 23:53:45,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090 conditions, 283 events. 162/283 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 955 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1066. Up to 77 conditions per place. [2023-01-27 23:53:45,255 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-01-27 23:53:45,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 497 flow [2023-01-27 23:53:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:53:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:53:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2023-01-27 23:53:45,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576612903225806 [2023-01-27 23:53:45,258 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 454 transitions. [2023-01-27 23:53:45,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 454 transitions. [2023-01-27 23:53:45,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:45,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 454 transitions. [2023-01-27 23:53:45,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 23:53:45,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 23:53:45,262 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 23:53:45,262 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 251 flow. Second operand 8 states and 454 transitions. [2023-01-27 23:53:45,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 497 flow [2023-01-27 23:53:45,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 467 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-27 23:53:45,267 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 344 flow [2023-01-27 23:53:45,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=344, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-01-27 23:53:45,268 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2023-01-27 23:53:45,268 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 344 flow [2023-01-27 23:53:45,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 23:53:45,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:45,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:45,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:53:45,269 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 23:53:45,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:45,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 3 times [2023-01-27 23:53:45,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:45,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069957533] [2023-01-27 23:53:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:45,347 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 23:53:45,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:45,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069957533] [2023-01-27 23:53:45,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069957533] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:45,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:53:45,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:53:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912198375] [2023-01-27 23:53:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:45,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:53:45,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:53:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:53:45,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:45,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 23:53:45,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:45,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:45,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:45,456 INFO L130 PetriNetUnfolder]: 158/275 cut-off events. [2023-01-27 23:53:45,456 INFO L131 PetriNetUnfolder]: For 1250/1250 co-relation queries the response was YES. [2023-01-27 23:53:45,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 275 events. 158/275 cut-off events. For 1250/1250 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 935 event pairs, 18 based on Foata normal form. 8/283 useless extension candidates. Maximal degree in co-relation 1225. Up to 65 conditions per place. [2023-01-27 23:53:45,458 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 28 selfloop transitions, 25 changer transitions 10/63 dead transitions. [2023-01-27 23:53:45,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 616 flow [2023-01-27 23:53:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:53:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:53:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 453 transitions. [2023-01-27 23:53:45,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566532258064516 [2023-01-27 23:53:45,461 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 453 transitions. [2023-01-27 23:53:45,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 453 transitions. [2023-01-27 23:53:45,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:45,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 453 transitions. [2023-01-27 23:53:45,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 23:53:45,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 23:53:45,464 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 23:53:45,464 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 344 flow. Second operand 8 states and 453 transitions. [2023-01-27 23:53:45,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 616 flow [2023-01-27 23:53:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 581 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-27 23:53:45,471 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 437 flow [2023-01-27 23:53:45,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=437, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-01-27 23:53:45,473 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 40 predicate places. [2023-01-27 23:53:45,473 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 437 flow [2023-01-27 23:53:45,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 23:53:45,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:45,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:53:45,474 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 23:53:45,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:45,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1868187119, now seen corresponding path program 4 times [2023-01-27 23:53:45,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:45,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642355461] [2023-01-27 23:53:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:45,583 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 23:53:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642355461] [2023-01-27 23:53:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642355461] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909880176] [2023-01-27 23:53:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:53:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:45,586 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 23:53:45,618 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 23:53:45,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:53:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:45,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:53:45,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:45,797 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 23:53:45,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:45,960 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 23:53:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909880176] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:45,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 23:53:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901268490] [2023-01-27 23:53:45,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:53:45,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:53:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:53:45,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:45,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 437 flow. Second operand has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 23:53:45,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:45,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:46,121 INFO L130 PetriNetUnfolder]: 182/323 cut-off events. [2023-01-27 23:53:46,121 INFO L131 PetriNetUnfolder]: For 2474/2474 co-relation queries the response was YES. [2023-01-27 23:53:46,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 323 events. 182/323 cut-off events. For 2474/2474 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1094 event pairs, 41 based on Foata normal form. 24/347 useless extension candidates. Maximal degree in co-relation 1574. Up to 181 conditions per place. [2023-01-27 23:53:46,124 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 45 selfloop transitions, 17 changer transitions 19/81 dead transitions. [2023-01-27 23:53:46,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 873 flow [2023-01-27 23:53:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 23:53:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 23:53:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 677 transitions. [2023-01-27 23:53:46,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549731182795699 [2023-01-27 23:53:46,127 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 677 transitions. [2023-01-27 23:53:46,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 677 transitions. [2023-01-27 23:53:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:46,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 677 transitions. [2023-01-27 23:53:46,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 56.416666666666664) internal successors, (677), 12 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 23:53:46,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 124.0) internal successors, (1612), 13 states have internal predecessors, (1612), 0 states have call successors, (0), 0 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 23:53:46,132 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 124.0) internal successors, (1612), 13 states have internal predecessors, (1612), 0 states have call successors, (0), 0 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 23:53:46,132 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 437 flow. Second operand 12 states and 677 transitions. [2023-01-27 23:53:46,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 873 flow [2023-01-27 23:53:46,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 820 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-01-27 23:53:46,140 INFO L231 Difference]: Finished difference. Result has 70 places, 47 transitions, 544 flow [2023-01-27 23:53:46,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=544, PETRI_PLACES=70, PETRI_TRANSITIONS=47} [2023-01-27 23:53:46,140 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 52 predicate places. [2023-01-27 23:53:46,141 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 47 transitions, 544 flow [2023-01-27 23:53:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 23:53:46,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:46,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:46,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:46,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:46,347 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 23:53:46,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1881593069, now seen corresponding path program 5 times [2023-01-27 23:53:46,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:46,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424183411] [2023-01-27 23:53:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:46,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:46,446 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 23:53:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:46,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424183411] [2023-01-27 23:53:46,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424183411] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:46,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761878828] [2023-01-27 23:53:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:53:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:46,448 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 23:53:46,476 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 23:53:46,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:53:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:53:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:46,570 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 23:53:46,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:46,667 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 23:53:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761878828] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:46,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:46,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-27 23:53:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916038360] [2023-01-27 23:53:46,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:46,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 23:53:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 23:53:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-01-27 23:53:46,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:46,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 47 transitions, 544 flow. Second operand has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 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 23:53:46,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:46,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:46,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:46,989 INFO L130 PetriNetUnfolder]: 244/439 cut-off events. [2023-01-27 23:53:46,989 INFO L131 PetriNetUnfolder]: For 6692/6692 co-relation queries the response was YES. [2023-01-27 23:53:46,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 439 events. 244/439 cut-off events. For 6692/6692 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1682 event pairs, 30 based on Foata normal form. 28/467 useless extension candidates. Maximal degree in co-relation 2476. Up to 128 conditions per place. [2023-01-27 23:53:46,992 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 46 selfloop transitions, 42 changer transitions 29/117 dead transitions. [2023-01-27 23:53:46,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1405 flow [2023-01-27 23:53:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:53:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:53:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1015 transitions. [2023-01-27 23:53:46,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45474910394265233 [2023-01-27 23:53:46,996 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1015 transitions. [2023-01-27 23:53:46,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1015 transitions. [2023-01-27 23:53:46,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:46,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1015 transitions. [2023-01-27 23:53:46,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.388888888888886) internal successors, (1015), 18 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 23:53:47,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 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 23:53:47,003 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 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 23:53:47,003 INFO L175 Difference]: Start difference. First operand has 70 places, 47 transitions, 544 flow. Second operand 18 states and 1015 transitions. [2023-01-27 23:53:47,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1405 flow [2023-01-27 23:53:47,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1265 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-01-27 23:53:47,017 INFO L231 Difference]: Finished difference. Result has 92 places, 64 transitions, 898 flow [2023-01-27 23:53:47,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=898, PETRI_PLACES=92, PETRI_TRANSITIONS=64} [2023-01-27 23:53:47,019 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 74 predicate places. [2023-01-27 23:53:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 64 transitions, 898 flow [2023-01-27 23:53:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 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 23:53:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:47,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:47,027 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 23:53:47,225 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,SelfDestructingSolverStorable7 [2023-01-27 23:53:47,225 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 23:53:47,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1657155026, now seen corresponding path program 6 times [2023-01-27 23:53:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:47,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609691451] [2023-01-27 23:53:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:47,313 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 23:53:47,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:47,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609691451] [2023-01-27 23:53:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609691451] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:47,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865525296] [2023-01-27 23:53:47,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:53:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:47,315 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 23:53:47,318 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 23:53:47,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:53:47,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 23:53:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:47,406 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 23:53:47,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:47,525 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 23:53:47,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865525296] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:47,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:47,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 23:53:47,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003239734] [2023-01-27 23:53:47,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:53:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:53:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:53:47,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:47,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 64 transitions, 898 flow. Second operand has 14 states, 14 states have (on average 52.714285714285715) internal successors, (738), 14 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 23:53:47,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:47,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:47,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:47,800 INFO L130 PetriNetUnfolder]: 328/599 cut-off events. [2023-01-27 23:53:47,800 INFO L131 PetriNetUnfolder]: For 14932/14932 co-relation queries the response was YES. [2023-01-27 23:53:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4413 conditions, 599 events. 328/599 cut-off events. For 14932/14932 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2510 event pairs, 23 based on Foata normal form. 24/623 useless extension candidates. Maximal degree in co-relation 4366. Up to 204 conditions per place. [2023-01-27 23:53:47,805 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 56 selfloop transitions, 58 changer transitions 19/133 dead transitions. [2023-01-27 23:53:47,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 2133 flow [2023-01-27 23:53:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:53:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:53:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1010 transitions. [2023-01-27 23:53:47,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525089605734767 [2023-01-27 23:53:47,809 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1010 transitions. [2023-01-27 23:53:47,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1010 transitions. [2023-01-27 23:53:47,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:47,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1010 transitions. [2023-01-27 23:53:47,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 23:53:47,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 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 23:53:47,815 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 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 23:53:47,815 INFO L175 Difference]: Start difference. First operand has 92 places, 64 transitions, 898 flow. Second operand 18 states and 1010 transitions. [2023-01-27 23:53:47,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 2133 flow [2023-01-27 23:53:47,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1847 flow, removed 129 selfloop flow, removed 7 redundant places. [2023-01-27 23:53:47,842 INFO L231 Difference]: Finished difference. Result has 110 places, 80 transitions, 1254 flow [2023-01-27 23:53:47,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1254, PETRI_PLACES=110, PETRI_TRANSITIONS=80} [2023-01-27 23:53:47,842 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 92 predicate places. [2023-01-27 23:53:47,843 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 80 transitions, 1254 flow [2023-01-27 23:53:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.714285714285715) internal successors, (738), 14 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 23:53:47,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:47,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:47,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:48,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:48,049 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 23:53:48,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 929897188, now seen corresponding path program 7 times [2023-01-27 23:53:48,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:48,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808482034] [2023-01-27 23:53:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:48,139 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 23:53:48,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:48,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808482034] [2023-01-27 23:53:48,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808482034] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:48,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145307028] [2023-01-27 23:53:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:53:48,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:48,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:48,141 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 23:53:48,169 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 23:53:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 23:53:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:48,249 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 23:53:48,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:48,314 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 23:53:48,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145307028] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:48,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:48,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 23:53:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840279829] [2023-01-27 23:53:48,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:48,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:53:48,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:48,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:53:48,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:53:48,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:48,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 80 transitions, 1254 flow. Second operand has 14 states, 14 states have (on average 52.785714285714285) internal successors, (739), 14 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:48,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:48,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:48,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:48,716 INFO L130 PetriNetUnfolder]: 388/707 cut-off events. [2023-01-27 23:53:48,716 INFO L131 PetriNetUnfolder]: For 28896/28896 co-relation queries the response was YES. [2023-01-27 23:53:48,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5907 conditions, 707 events. 388/707 cut-off events. For 28896/28896 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3077 event pairs, 12 based on Foata normal form. 28/735 useless extension candidates. Maximal degree in co-relation 5852. Up to 243 conditions per place. [2023-01-27 23:53:48,723 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 46 selfloop transitions, 84 changer transitions 38/168 dead transitions. [2023-01-27 23:53:48,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 3020 flow [2023-01-27 23:53:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:53:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:53:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1238 transitions. [2023-01-27 23:53:48,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538123167155425 [2023-01-27 23:53:48,728 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1238 transitions. [2023-01-27 23:53:48,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1238 transitions. [2023-01-27 23:53:48,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:48,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1238 transitions. [2023-01-27 23:53:48,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 56.27272727272727) internal successors, (1238), 22 states have internal predecessors, (1238), 0 states have call successors, (0), 0 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 23:53:48,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 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 23:53:48,738 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 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 23:53:48,738 INFO L175 Difference]: Start difference. First operand has 110 places, 80 transitions, 1254 flow. Second operand 22 states and 1238 transitions. [2023-01-27 23:53:48,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 3020 flow [2023-01-27 23:53:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 2448 flow, removed 251 selfloop flow, removed 12 redundant places. [2023-01-27 23:53:48,779 INFO L231 Difference]: Finished difference. Result has 130 places, 101 transitions, 1724 flow [2023-01-27 23:53:48,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1724, PETRI_PLACES=130, PETRI_TRANSITIONS=101} [2023-01-27 23:53:48,780 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 112 predicate places. [2023-01-27 23:53:48,781 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 101 transitions, 1724 flow [2023-01-27 23:53:48,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.785714285714285) internal successors, (739), 14 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:53:48,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:48,787 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 23:53:48,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:48,987 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 23:53:48,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:48,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1150765664, now seen corresponding path program 8 times [2023-01-27 23:53:48,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203333439] [2023-01-27 23:53:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:48,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:49,129 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 23:53:49,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203333439] [2023-01-27 23:53:49,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203333439] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228169544] [2023-01-27 23:53:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:53:49,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:49,131 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 23:53:49,159 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 23:53:49,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:53:49,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:53:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:49,272 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 23:53:49,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:49,420 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 23:53:49,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228169544] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:49,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:49,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-01-27 23:53:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585878629] [2023-01-27 23:53:49,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:49,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 23:53:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 23:53:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-01-27 23:53:49,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:49,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 101 transitions, 1724 flow. Second operand has 22 states, 22 states have (on average 52.5) internal successors, (1155), 22 states have internal predecessors, (1155), 0 states have call successors, (0), 0 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 23:53:49,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:49,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:49,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:50,103 INFO L130 PetriNetUnfolder]: 536/955 cut-off events. [2023-01-27 23:53:50,103 INFO L131 PetriNetUnfolder]: For 45023/45023 co-relation queries the response was YES. [2023-01-27 23:53:50,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8855 conditions, 955 events. 536/955 cut-off events. For 45023/45023 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4100 event pairs, 15 based on Foata normal form. 36/991 useless extension candidates. Maximal degree in co-relation 8792. Up to 335 conditions per place. [2023-01-27 23:53:50,112 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-01-27 23:53:50,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 4988 flow [2023-01-27 23:53:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 23:53:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 23:53:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2018 transitions. [2023-01-27 23:53:50,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4520609318996416 [2023-01-27 23:53:50,117 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2018 transitions. [2023-01-27 23:53:50,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2018 transitions. [2023-01-27 23:53:50,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:50,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2018 transitions. [2023-01-27 23:53:50,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 56.05555555555556) internal successors, (2018), 36 states have internal predecessors, (2018), 0 states have call successors, (0), 0 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 23:53:50,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 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 23:53:50,132 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 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 23:53:50,132 INFO L175 Difference]: Start difference. First operand has 130 places, 101 transitions, 1724 flow. Second operand 36 states and 2018 transitions. [2023-01-27 23:53:50,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 4988 flow [2023-01-27 23:53:50,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 247 transitions, 4352 flow, removed 281 selfloop flow, removed 14 redundant places. [2023-01-27 23:53:50,195 INFO L231 Difference]: Finished difference. Result has 169 places, 138 transitions, 2762 flow [2023-01-27 23:53:50,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2762, PETRI_PLACES=169, PETRI_TRANSITIONS=138} [2023-01-27 23:53:50,195 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 151 predicate places. [2023-01-27 23:53:50,196 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 138 transitions, 2762 flow [2023-01-27 23:53:50,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.5) internal successors, (1155), 22 states have internal predecessors, (1155), 0 states have call successors, (0), 0 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 23:53:50,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:50,196 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:50,202 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 23:53:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 23:53:50,402 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 23:53:50,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2052641735, now seen corresponding path program 9 times [2023-01-27 23:53:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:50,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740079054] [2023-01-27 23:53:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:50,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:50,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740079054] [2023-01-27 23:53:50,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740079054] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:50,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143893355] [2023-01-27 23:53:50,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:53:50,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:50,713 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 23:53:50,715 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 23:53:50,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-01-27 23:53:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-27 23:53:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:50,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143893355] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:51,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:51,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2023-01-27 23:53:51,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576085671] [2023-01-27 23:53:51,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 23:53:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 23:53:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-01-27 23:53:51,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:51,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 138 transitions, 2762 flow. Second operand has 26 states, 26 states have (on average 52.46153846153846) internal successors, (1364), 26 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 23:53:51,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:51,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:51,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:51,780 INFO L130 PetriNetUnfolder]: 664/1211 cut-off events. [2023-01-27 23:53:51,780 INFO L131 PetriNetUnfolder]: For 96771/96771 co-relation queries the response was YES. [2023-01-27 23:53:51,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13940 conditions, 1211 events. 664/1211 cut-off events. For 96771/96771 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5484 event pairs, 102 based on Foata normal form. 32/1243 useless extension candidates. Maximal degree in co-relation 13864. Up to 463 conditions per place. [2023-01-27 23:53:51,794 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 106 selfloop transitions, 96 changer transitions 53/255 dead transitions. [2023-01-27 23:53:51,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 6364 flow [2023-01-27 23:53:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:53:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:53:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2023-01-27 23:53:51,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44938820912124583 [2023-01-27 23:53:51,798 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2023-01-27 23:53:51,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2023-01-27 23:53:51,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:51,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2023-01-27 23:53:51,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 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 23:53:51,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 124.0) internal successors, (3720), 30 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 23:53:51,806 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 124.0) internal successors, (3720), 30 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 23:53:51,806 INFO L175 Difference]: Start difference. First operand has 169 places, 138 transitions, 2762 flow. Second operand 29 states and 1616 transitions. [2023-01-27 23:53:51,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 6364 flow [2023-01-27 23:53:51,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 255 transitions, 4882 flow, removed 710 selfloop flow, removed 13 redundant places. [2023-01-27 23:53:51,976 INFO L231 Difference]: Finished difference. Result has 194 places, 170 transitions, 3113 flow [2023-01-27 23:53:51,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3113, PETRI_PLACES=194, PETRI_TRANSITIONS=170} [2023-01-27 23:53:51,977 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 176 predicate places. [2023-01-27 23:53:51,977 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 170 transitions, 3113 flow [2023-01-27 23:53:51,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.46153846153846) internal successors, (1364), 26 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 23:53:51,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:51,978 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:51,983 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 23:53:52,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:52,184 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 23:53:52,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1437345109, now seen corresponding path program 10 times [2023-01-27 23:53:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:52,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865896600] [2023-01-27 23:53:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:52,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:52,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865896600] [2023-01-27 23:53:52,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865896600] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020294833] [2023-01-27 23:53:52,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:53:52,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:52,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:52,418 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 23:53:52,421 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 23:53:52,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:53:52,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-27 23:53:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:52,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:52,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020294833] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:52,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:52,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2023-01-27 23:53:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992419602] [2023-01-27 23:53:52,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:52,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:53:52,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:53:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2023-01-27 23:53:52,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:52,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 170 transitions, 3113 flow. Second operand has 30 states, 30 states have (on average 52.4) internal successors, (1572), 30 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 23:53:52,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:52,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:52,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:53,750 INFO L130 PetriNetUnfolder]: 808/1483 cut-off events. [2023-01-27 23:53:53,751 INFO L131 PetriNetUnfolder]: For 155488/155488 co-relation queries the response was YES. [2023-01-27 23:53:53,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17184 conditions, 1483 events. 808/1483 cut-off events. For 155488/155488 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6848 event pairs, 44 based on Foata normal form. 32/1515 useless extension candidates. Maximal degree in co-relation 17102. Up to 591 conditions per place. [2023-01-27 23:53:53,772 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 73 selfloop transitions, 173 changer transitions 67/313 dead transitions. [2023-01-27 23:53:53,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 313 transitions, 7237 flow [2023-01-27 23:53:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 23:53:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 23:53:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2008 transitions. [2023-01-27 23:53:53,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449820788530466 [2023-01-27 23:53:53,776 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2008 transitions. [2023-01-27 23:53:53,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2008 transitions. [2023-01-27 23:53:53,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:53,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2008 transitions. [2023-01-27 23:53:53,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.77777777777778) internal successors, (2008), 36 states have internal predecessors, (2008), 0 states have call successors, (0), 0 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 23:53:53,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 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 23:53:53,788 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 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 23:53:53,789 INFO L175 Difference]: Start difference. First operand has 194 places, 170 transitions, 3113 flow. Second operand 36 states and 2008 transitions. [2023-01-27 23:53:53,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 313 transitions, 7237 flow [2023-01-27 23:53:54,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 6565 flow, removed 304 selfloop flow, removed 11 redundant places. [2023-01-27 23:53:54,055 INFO L231 Difference]: Finished difference. Result has 231 places, 207 transitions, 4118 flow [2023-01-27 23:53:54,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4118, PETRI_PLACES=231, PETRI_TRANSITIONS=207} [2023-01-27 23:53:54,056 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 213 predicate places. [2023-01-27 23:53:54,056 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 207 transitions, 4118 flow [2023-01-27 23:53:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 52.4) internal successors, (1572), 30 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 23:53:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:54,061 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 23:53:54,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:54,258 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 23:53:54,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash -162127443, now seen corresponding path program 11 times [2023-01-27 23:53:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:54,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604655016] [2023-01-27 23:53:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604655016] [2023-01-27 23:53:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604655016] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458803504] [2023-01-27 23:53:54,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:53:54,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:54,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:54,487 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 23:53:54,512 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 23:53:54,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-01-27 23:53:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-27 23:53:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:54,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:54,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458803504] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:54,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:54,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2023-01-27 23:53:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897506537] [2023-01-27 23:53:54,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:54,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 23:53:54,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 23:53:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-01-27 23:53:54,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:54,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 207 transitions, 4118 flow. Second operand has 26 states, 26 states have (on average 52.46153846153846) internal successors, (1364), 26 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 23:53:54,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:54,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:54,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:55,914 INFO L130 PetriNetUnfolder]: 928/1687 cut-off events. [2023-01-27 23:53:55,914 INFO L131 PetriNetUnfolder]: For 235833/235833 co-relation queries the response was YES. [2023-01-27 23:53:55,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22177 conditions, 1687 events. 928/1687 cut-off events. For 235833/235833 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7743 event pairs, 16 based on Foata normal form. 32/1719 useless extension candidates. Maximal degree in co-relation 22081. Up to 675 conditions per place. [2023-01-27 23:53:55,935 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 76 selfloop transitions, 214 changer transitions 75/365 dead transitions. [2023-01-27 23:53:55,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 365 transitions, 9590 flow [2023-01-27 23:53:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 23:53:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 23:53:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2457 transitions. [2023-01-27 23:53:55,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503299120234604 [2023-01-27 23:53:55,940 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2457 transitions. [2023-01-27 23:53:55,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2457 transitions. [2023-01-27 23:53:55,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:55,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2457 transitions. [2023-01-27 23:53:55,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.84090909090909) internal successors, (2457), 44 states have internal predecessors, (2457), 0 states have call successors, (0), 0 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 23:53:55,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 124.0) internal successors, (5580), 45 states have internal predecessors, (5580), 0 states have call successors, (0), 0 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 23:53:55,964 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 124.0) internal successors, (5580), 45 states have internal predecessors, (5580), 0 states have call successors, (0), 0 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 23:53:55,964 INFO L175 Difference]: Start difference. First operand has 231 places, 207 transitions, 4118 flow. Second operand 44 states and 2457 transitions. [2023-01-27 23:53:55,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 365 transitions, 9590 flow [2023-01-27 23:53:56,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 365 transitions, 8810 flow, removed 301 selfloop flow, removed 17 redundant places. [2023-01-27 23:53:56,250 INFO L231 Difference]: Finished difference. Result has 273 places, 234 transitions, 5349 flow [2023-01-27 23:53:56,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5349, PETRI_PLACES=273, PETRI_TRANSITIONS=234} [2023-01-27 23:53:56,250 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 255 predicate places. [2023-01-27 23:53:56,251 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 234 transitions, 5349 flow [2023-01-27 23:53:56,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.46153846153846) internal successors, (1364), 26 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 23:53:56,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:56,251 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:56,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 23:53:56,461 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,SelfDestructingSolverStorable13 [2023-01-27 23:53:56,461 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 23:53:56,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1774196837, now seen corresponding path program 12 times [2023-01-27 23:53:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294913307] [2023-01-27 23:53:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294913307] [2023-01-27 23:53:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294913307] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827292775] [2023-01-27 23:53:56,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:53:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:56,825 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 23:53:56,853 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 23:53:56,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-01-27 23:53:56,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:53:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 23:53:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:56,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:53:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:57,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827292775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:53:57,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:53:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 28 [2023-01-27 23:53:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340468964] [2023-01-27 23:53:57,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:53:57,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:53:57,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:53:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2023-01-27 23:53:57,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 23:53:57,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 234 transitions, 5349 flow. Second operand has 30 states, 30 states have (on average 52.4) internal successors, (1572), 30 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 23:53:57,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:57,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 23:53:57,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:53:58,823 INFO L130 PetriNetUnfolder]: 1040/1887 cut-off events. [2023-01-27 23:53:58,824 INFO L131 PetriNetUnfolder]: For 379876/379876 co-relation queries the response was YES. [2023-01-27 23:53:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28674 conditions, 1887 events. 1040/1887 cut-off events. For 379876/379876 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 8809 event pairs, 17 based on Foata normal form. 28/1915 useless extension candidates. Maximal degree in co-relation 28562. Up to 755 conditions per place. [2023-01-27 23:53:58,849 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 79 selfloop transitions, 247 changer transitions 96/422 dead transitions. [2023-01-27 23:53:58,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 422 transitions, 12533 flow [2023-01-27 23:53:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-27 23:53:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-27 23:53:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2847 transitions. [2023-01-27 23:53:58,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501897533206831 [2023-01-27 23:53:58,861 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2847 transitions. [2023-01-27 23:53:58,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2847 transitions. [2023-01-27 23:53:58,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:53:58,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2847 transitions. [2023-01-27 23:53:58,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.8235294117647) internal successors, (2847), 51 states have internal predecessors, (2847), 0 states have call successors, (0), 0 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 23:53:58,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 124.0) internal successors, (6448), 52 states have internal predecessors, (6448), 0 states have call successors, (0), 0 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 23:53:58,879 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 124.0) internal successors, (6448), 52 states have internal predecessors, (6448), 0 states have call successors, (0), 0 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 23:53:58,879 INFO L175 Difference]: Start difference. First operand has 273 places, 234 transitions, 5349 flow. Second operand 51 states and 2847 transitions. [2023-01-27 23:53:58,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 422 transitions, 12533 flow [2023-01-27 23:53:59,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 422 transitions, 10486 flow, removed 883 selfloop flow, removed 28 redundant places. [2023-01-27 23:53:59,363 INFO L231 Difference]: Finished difference. Result has 305 places, 266 transitions, 5711 flow [2023-01-27 23:53:59,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5711, PETRI_PLACES=305, PETRI_TRANSITIONS=266} [2023-01-27 23:53:59,364 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 287 predicate places. [2023-01-27 23:53:59,364 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 266 transitions, 5711 flow [2023-01-27 23:53:59,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 52.4) internal successors, (1572), 30 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 23:53:59,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:53:59,365 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:53:59,370 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 23:53:59,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 23:53:59,570 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 23:53:59,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:53:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash -984748001, now seen corresponding path program 13 times [2023-01-27 23:53:59,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:53:59,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498806498] [2023-01-27 23:53:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:53:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:53:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:59,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:53:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498806498] [2023-01-27 23:53:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498806498] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:53:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534094087] [2023-01-27 23:53:59,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:53:59,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:53:59,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:53:59,706 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 23:53:59,724 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 23:53:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:53:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:53:59,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:53:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:53:59,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 23:53:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534094087] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:53:59,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 23:53:59,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2023-01-27 23:53:59,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058035244] [2023-01-27 23:53:59,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:53:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 23:53:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:53:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 23:53:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:53:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 124 [2023-01-27 23:53:59,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 266 transitions, 5711 flow. Second operand has 13 states, 13 states have (on average 57.23076923076923) internal successors, (744), 13 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 23:53:59,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:53:59,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 124 [2023-01-27 23:53:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:01,594 INFO L130 PetriNetUnfolder]: 4503/7073 cut-off events. [2023-01-27 23:54:01,594 INFO L131 PetriNetUnfolder]: For 1559366/1559366 co-relation queries the response was YES. [2023-01-27 23:54:01,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100155 conditions, 7073 events. 4503/7073 cut-off events. For 1559366/1559366 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 38784 event pairs, 102 based on Foata normal form. 380/7453 useless extension candidates. Maximal degree in co-relation 100036. Up to 3450 conditions per place. [2023-01-27 23:54:01,646 INFO L137 encePairwiseOnDemand]: 121/124 looper letters, 0 selfloop transitions, 0 changer transitions 1332/1332 dead transitions. [2023-01-27 23:54:01,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1332 transitions, 27305 flow [2023-01-27 23:54:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 23:54:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 23:54:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 812 transitions. [2023-01-27 23:54:01,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037220843672456 [2023-01-27 23:54:01,650 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 812 transitions. [2023-01-27 23:54:01,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 812 transitions. [2023-01-27 23:54:01,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:01,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 812 transitions. [2023-01-27 23:54:01,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 62.46153846153846) internal successors, (812), 13 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 23:54:01,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 124.0) internal successors, (1736), 14 states have internal predecessors, (1736), 0 states have call successors, (0), 0 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 23:54:01,654 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 124.0) internal successors, (1736), 14 states have internal predecessors, (1736), 0 states have call successors, (0), 0 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 23:54:01,655 INFO L175 Difference]: Start difference. First operand has 305 places, 266 transitions, 5711 flow. Second operand 13 states and 812 transitions. [2023-01-27 23:54:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1332 transitions, 27305 flow [2023-01-27 23:54:03,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1332 transitions, 24302 flow, removed 301 selfloop flow, removed 44 redundant places. [2023-01-27 23:54:03,128 INFO L231 Difference]: Finished difference. Result has 271 places, 0 transitions, 0 flow [2023-01-27 23:54:03,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=271, PETRI_TRANSITIONS=0} [2023-01-27 23:54:03,128 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 253 predicate places. [2023-01-27 23:54:03,128 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 0 transitions, 0 flow [2023-01-27 23:54:03,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 57.23076923076923) internal successors, (744), 13 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 23:54:03,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:54:03,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:54:03,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:54:03,141 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 23:54:03,336 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,SelfDestructingSolverStorable15 [2023-01-27 23:54:03,337 INFO L445 BasicCegarLoop]: Path program histogram: [13, 2, 1] [2023-01-27 23:54:03,341 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:54:03,341 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:54:03,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:54:03 BasicIcfg [2023-01-27 23:54:03,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:54:03,344 INFO L158 Benchmark]: Toolchain (without parser) took 22412.86ms. Allocated memory was 396.4MB in the beginning and 922.7MB in the end (delta: 526.4MB). Free memory was 342.6MB in the beginning and 692.4MB in the end (delta: -349.7MB). Peak memory consumption was 496.7MB. Max. memory is 16.0GB. [2023-01-27 23:54:03,344 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory was 213.4MB in the beginning and 213.2MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:54:03,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 432.57ms. Allocated memory is still 396.4MB. Free memory was 342.4MB in the beginning and 367.7MB in the end (delta: -25.3MB). Peak memory consumption was 20.0MB. Max. memory is 16.0GB. [2023-01-27 23:54:03,345 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.66ms. Allocated memory is still 396.4MB. Free memory was 367.7MB in the beginning and 365.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:54:03,345 INFO L158 Benchmark]: Boogie Preprocessor took 36.32ms. Allocated memory is still 396.4MB. Free memory was 365.7MB in the beginning and 364.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:54:03,345 INFO L158 Benchmark]: RCFGBuilder took 403.97ms. Allocated memory is still 396.4MB. Free memory was 364.2MB in the beginning and 351.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 23:54:03,346 INFO L158 Benchmark]: TraceAbstraction took 21492.61ms. Allocated memory was 396.4MB in the beginning and 922.7MB in the end (delta: 526.4MB). Free memory was 351.1MB in the beginning and 692.4MB in the end (delta: -341.3MB). Peak memory consumption was 504.0MB. Max. memory is 16.0GB. [2023-01-27 23:54:03,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory was 213.4MB in the beginning and 213.2MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 432.57ms. Allocated memory is still 396.4MB. Free memory was 342.4MB in the beginning and 367.7MB in the end (delta: -25.3MB). Peak memory consumption was 20.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.66ms. Allocated memory is still 396.4MB. Free memory was 367.7MB in the beginning and 365.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.32ms. Allocated memory is still 396.4MB. Free memory was 365.7MB in the beginning and 364.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 403.97ms. Allocated memory is still 396.4MB. Free memory was 364.2MB in the beginning and 351.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 21492.61ms. Allocated memory was 396.4MB in the beginning and 922.7MB in the end (delta: 526.4MB). Free memory was 351.1MB in the beginning and 692.4MB in the end (delta: -341.3MB). Peak memory consumption was 504.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 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: 21.4s, OverallIterations: 16, TraceHistogramMax: 11, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 11.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3064 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3064 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2551 IncrementalHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 285 mSolverCounterUnsat, 0 mSDtfsCounter, 2551 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 218 SyntacticMatches, 35 SemanticMatches, 444 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6135 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5711occurred in iteration=15, InterpolantAutomatonStates: 319, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 420 NumberOfCodeBlocks, 420 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 540 ConstructedInterpolants, 0 QuantifiedInterpolants, 2196 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1620 ConjunctsInSsa, 149 ConjunctsInUnsatCore, 35 InterpolantComputations, 7 PerfectInterpolantSequences, 190/875 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-27 23:54:03,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...