/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 16:37:29,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 16:37:29,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 16:37:29,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 16:37:29,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 16:37:29,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 16:37:29,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 16:37:29,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 16:37:29,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 16:37:29,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 16:37:29,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 16:37:29,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 16:37:29,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 16:37:29,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 16:37:29,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 16:37:29,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 16:37:29,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 16:37:29,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 16:37:29,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 16:37:29,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 16:37:29,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 16:37:29,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 16:37:29,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 16:37:29,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 16:37:29,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 16:37:29,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 16:37:29,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 16:37:29,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 16:37:29,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 16:37:29,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 16:37:29,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 16:37:29,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 16:37:29,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 16:37:29,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 16:37:29,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 16:37:29,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 16:37:29,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 16:37:29,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 16:37:29,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 16:37:29,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 16:37:29,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 16:37:29,682 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-SemanticLbe.epf [2022-12-12 16:37:29,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 16:37:29,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 16:37:29,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 16:37:29,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 16:37:29,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 16:37:29,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 16:37:29,709 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 16:37:29,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 16:37:29,709 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 16:37:29,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 16:37:29,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 16:37:29,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 16:37:29,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:37:29,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 16:37:29,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 16:37:29,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 16:37:29,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 16:37:29,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 16:37:29,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 16:37:29,964 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 16:37:29,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2022-12-12 16:37:30,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 16:37:31,116 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 16:37:31,116 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2022-12-12 16:37:31,122 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/534ccb2a2/355672d867984414b44bc4a014f63d89/FLAGa64f00552 [2022-12-12 16:37:31,137 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/534ccb2a2/355672d867984414b44bc4a014f63d89 [2022-12-12 16:37:31,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 16:37:31,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 16:37:31,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 16:37:31,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 16:37:31,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 16:37:31,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600e021d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31, skipping insertion in model container [2022-12-12 16:37:31,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 16:37:31,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 16:37:31,323 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2022-12-12 16:37:31,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:37:31,342 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 16:37:31,370 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2022-12-12 16:37:31,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:37:31,387 INFO L208 MainTranslator]: Completed translation [2022-12-12 16:37:31,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31 WrapperNode [2022-12-12 16:37:31,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 16:37:31,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 16:37:31,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 16:37:31,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 16:37:31,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,432 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-12-12 16:37:31,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 16:37:31,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 16:37:31,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 16:37:31,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 16:37:31,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 16:37:31,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 16:37:31,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 16:37:31,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 16:37:31,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (1/1) ... [2022-12-12 16:37:31,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:37:31,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:31,487 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) [2022-12-12 16:37:31,496 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 [2022-12-12 16:37:31,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 16:37:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 16:37:31,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 16:37:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 16:37:31,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 16:37:31,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 16:37:31,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 16:37:31,521 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 16:37:31,629 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 16:37:31,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 16:37:31,880 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 16:37:31,886 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 16:37:31,886 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 16:37:31,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:37:31 BoogieIcfgContainer [2022-12-12 16:37:31,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 16:37:31,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 16:37:31,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 16:37:31,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 16:37:31,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 04:37:31" (1/3) ... [2022-12-12 16:37:31,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1fdcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:37:31, skipping insertion in model container [2022-12-12 16:37:31,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:37:31" (2/3) ... [2022-12-12 16:37:31,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1fdcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:37:31, skipping insertion in model container [2022-12-12 16:37:31,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:37:31" (3/3) ... [2022-12-12 16:37:31,896 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-12-12 16:37:31,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 16:37:31,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 16:37:31,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 16:37:31,989 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 16:37:32,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 154 transitions, 324 flow [2022-12-12 16:37:32,103 INFO L130 PetriNetUnfolder]: 14/152 cut-off events. [2022-12-12 16:37:32,103 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:37:32,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 14/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 97. Up to 2 conditions per place. [2022-12-12 16:37:32,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 154 transitions, 324 flow [2022-12-12 16:37:32,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 144 transitions, 300 flow [2022-12-12 16:37:32,116 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 16:37:32,131 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 144 transitions, 300 flow [2022-12-12 16:37:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 144 transitions, 300 flow [2022-12-12 16:37:32,163 INFO L130 PetriNetUnfolder]: 14/144 cut-off events. [2022-12-12 16:37:32,163 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:37:32,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 144 events. 14/144 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 138 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 97. Up to 2 conditions per place. [2022-12-12 16:37:32,166 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 144 transitions, 300 flow [2022-12-12 16:37:32,166 INFO L226 LiptonReduction]: Number of co-enabled transitions 1942 [2022-12-12 16:37:35,535 INFO L241 LiptonReduction]: Total number of compositions: 127 [2022-12-12 16:37:35,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 16:37:35,549 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;@20f640b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 16:37:35,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 16:37:35,553 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-12 16:37:35,553 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:37:35,553 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:35,553 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:35,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1849926836, now seen corresponding path program 1 times [2022-12-12 16:37:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:35,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637935785] [2022-12-12 16:37:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:35,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637935785] [2022-12-12 16:37:35,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637935785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:35,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:37:35,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:37:35,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338954420] [2022-12-12 16:37:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:37:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:37:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:37:35,827 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:37:35,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:35,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:35,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:37:35,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:35,889 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2022-12-12 16:37:35,889 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 16:37:35,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-12 16:37:35,891 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-12 16:37:35,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-12 16:37:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:37:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:37:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-12 16:37:35,899 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2022-12-12 16:37:35,900 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 23 transitions. [2022-12-12 16:37:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-12 16:37:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-12 16:37:35,903 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-12 16:37:35,904 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-12 16:37:35,906 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-12 16:37:35,907 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-12 16:37:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:35,907 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:35,907 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 16:37:35,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 908274848, now seen corresponding path program 1 times [2022-12-12 16:37:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:35,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206486838] [2022-12-12 16:37:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206486838] [2022-12-12 16:37:36,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206486838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:36,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:37:36,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 16:37:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911294054] [2022-12-12 16:37:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:36,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:37:36,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:36,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:37:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:37:36,113 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:37:36,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:36,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:36,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:37:36,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:36,154 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2022-12-12 16:37:36,156 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 16:37:36,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 314 event pairs, 9 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2022-12-12 16:37:36,163 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2022-12-12 16:37:36,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2022-12-12 16:37:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:37:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:37:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2022-12-12 16:37:36,164 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2022-12-12 16:37:36,164 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 32 transitions. [2022-12-12 16:37:36,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2022-12-12 16:37:36,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:37:36,165 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2022-12-12 16:37:36,165 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2022-12-12 16:37:36,167 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-12-12 16:37:36,167 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2022-12-12 16:37:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:36,167 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:36,167 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 16:37:36,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:36,170 INFO L85 PathProgramCache]: Analyzing trace with hash -390113477, now seen corresponding path program 1 times [2022-12-12 16:37:36,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:36,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357514920] [2022-12-12 16:37:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:36,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:36,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357514920] [2022-12-12 16:37:36,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357514920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:36,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:37:36,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:37:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051875096] [2022-12-12 16:37:36,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:37:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:37:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:37:36,311 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:37:36,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:36,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:36,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:37:36,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:36,417 INFO L130 PetriNetUnfolder]: 87/170 cut-off events. [2022-12-12 16:37:36,417 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-12 16:37:36,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 170 events. 87/170 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 517 event pairs, 30 based on Foata normal form. 6/175 useless extension candidates. Maximal degree in co-relation 392. Up to 99 conditions per place. [2022-12-12 16:37:36,418 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 31 selfloop transitions, 4 changer transitions 6/41 dead transitions. [2022-12-12 16:37:36,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 203 flow [2022-12-12 16:37:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:37:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:37:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-12 16:37:36,419 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-12 16:37:36,419 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 39 transitions. [2022-12-12 16:37:36,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 203 flow [2022-12-12 16:37:36,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 16:37:36,420 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2022-12-12 16:37:36,420 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-12-12 16:37:36,421 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-12-12 16:37:36,421 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2022-12-12 16:37:36,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:36,421 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:36,421 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:36,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 16:37:36,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:36,422 INFO L85 PathProgramCache]: Analyzing trace with hash -942968369, now seen corresponding path program 2 times [2022-12-12 16:37:36,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:36,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101279504] [2022-12-12 16:37:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:36,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:36,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101279504] [2022-12-12 16:37:36,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101279504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779662901] [2022-12-12 16:37:36,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:37:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:36,528 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) [2022-12-12 16:37:36,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 16:37:36,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:37:36,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 16:37:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:36,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 16:37:36,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779662901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:36,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 16:37:36,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-12-12 16:37:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437594841] [2022-12-12 16:37:36,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:37:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:37:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:37:36,698 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 16:37:36,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:36,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:36,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 16:37:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:36,766 INFO L130 PetriNetUnfolder]: 89/166 cut-off events. [2022-12-12 16:37:36,767 INFO L131 PetriNetUnfolder]: For 146/154 co-relation queries the response was YES. [2022-12-12 16:37:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 166 events. 89/166 cut-off events. For 146/154 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 20 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 499. Up to 106 conditions per place. [2022-12-12 16:37:36,768 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 30 selfloop transitions, 4 changer transitions 2/37 dead transitions. [2022-12-12 16:37:36,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 215 flow [2022-12-12 16:37:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:37:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:37:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-12-12 16:37:36,769 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2022-12-12 16:37:36,769 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 38 transitions. [2022-12-12 16:37:36,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 215 flow [2022-12-12 16:37:36,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 202 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-12 16:37:36,771 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2022-12-12 16:37:36,771 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2022-12-12 16:37:36,771 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2022-12-12 16:37:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2022-12-12 16:37:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:36,771 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:36,772 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:36,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:36,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:36,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash -267788409, now seen corresponding path program 1 times [2022-12-12 16:37:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:36,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76061981] [2022-12-12 16:37:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:36,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:37,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:37,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76061981] [2022-12-12 16:37:37,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76061981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:37,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:37:37,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:37:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827615848] [2022-12-12 16:37:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:37:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:37:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:37:37,096 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:37:37,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:37,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:37,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:37:37,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:37,199 INFO L130 PetriNetUnfolder]: 103/208 cut-off events. [2022-12-12 16:37:37,200 INFO L131 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2022-12-12 16:37:37,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 208 events. 103/208 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 743 event pairs, 36 based on Foata normal form. 12/219 useless extension candidates. Maximal degree in co-relation 637. Up to 127 conditions per place. [2022-12-12 16:37:37,201 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 35 selfloop transitions, 4 changer transitions 10/49 dead transitions. [2022-12-12 16:37:37,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 49 transitions, 311 flow [2022-12-12 16:37:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:37:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:37:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-12 16:37:37,202 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2022-12-12 16:37:37,202 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 5 states and 41 transitions. [2022-12-12 16:37:37,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 49 transitions, 311 flow [2022-12-12 16:37:37,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 16:37:37,204 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 143 flow [2022-12-12 16:37:37,204 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2022-12-12 16:37:37,205 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2022-12-12 16:37:37,205 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 143 flow [2022-12-12 16:37:37,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:37,205 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:37,205 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 16:37:37,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1723132359, now seen corresponding path program 2 times [2022-12-12 16:37:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:37,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792445145] [2022-12-12 16:37:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792445145] [2022-12-12 16:37:37,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792445145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540336189] [2022-12-12 16:37:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:37:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:37,306 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) [2022-12-12 16:37:37,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 16:37:37,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:37:37,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:37,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 16:37:37,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:37,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 16:37:37,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540336189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:37,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 16:37:37,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-12-12 16:37:37,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974121652] [2022-12-12 16:37:37,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:37,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:37:37,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:37,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:37:37,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:37:37,411 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 16:37:37,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:37,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:37,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 16:37:37,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:37,465 INFO L130 PetriNetUnfolder]: 91/185 cut-off events. [2022-12-12 16:37:37,466 INFO L131 PetriNetUnfolder]: For 327/335 co-relation queries the response was YES. [2022-12-12 16:37:37,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 185 events. 91/185 cut-off events. For 327/335 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 615 event pairs, 30 based on Foata normal form. 12/188 useless extension candidates. Maximal degree in co-relation 663. Up to 126 conditions per place. [2022-12-12 16:37:37,467 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 28 selfloop transitions, 4 changer transitions 5/39 dead transitions. [2022-12-12 16:37:37,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 276 flow [2022-12-12 16:37:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:37:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:37:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 36 transitions. [2022-12-12 16:37:37,468 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2022-12-12 16:37:37,468 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 143 flow. Second operand 4 states and 36 transitions. [2022-12-12 16:37:37,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 276 flow [2022-12-12 16:37:37,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 263 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-12 16:37:37,470 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 166 flow [2022-12-12 16:37:37,470 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2022-12-12 16:37:37,470 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2022-12-12 16:37:37,470 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 166 flow [2022-12-12 16:37:37,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:37,470 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:37,471 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:37,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 16:37:37,676 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,SelfDestructingSolverStorable5 [2022-12-12 16:37:37,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 70243269, now seen corresponding path program 3 times [2022-12-12 16:37:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:37,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217348653] [2022-12-12 16:37:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:37,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:37,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217348653] [2022-12-12 16:37:37,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217348653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88026492] [2022-12-12 16:37:37,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:37:37,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:37,777 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) [2022-12-12 16:37:37,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 16:37:37,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:37:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 16:37:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:37,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 16:37:37,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88026492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:37,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 16:37:37,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-12 16:37:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881260381] [2022-12-12 16:37:37,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:37,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:37:37,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:37:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 16:37:37,887 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 16:37:37,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:37,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:37,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 16:37:37,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:37,940 INFO L130 PetriNetUnfolder]: 93/184 cut-off events. [2022-12-12 16:37:37,940 INFO L131 PetriNetUnfolder]: For 411/427 co-relation queries the response was YES. [2022-12-12 16:37:37,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 184 events. 93/184 cut-off events. For 411/427 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 621 event pairs, 35 based on Foata normal form. 10/185 useless extension candidates. Maximal degree in co-relation 675. Up to 126 conditions per place. [2022-12-12 16:37:37,942 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 29 selfloop transitions, 8 changer transitions 3/42 dead transitions. [2022-12-12 16:37:37,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 314 flow [2022-12-12 16:37:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:37:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:37:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2022-12-12 16:37:37,943 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2022-12-12 16:37:37,943 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 166 flow. Second operand 4 states and 35 transitions. [2022-12-12 16:37:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 314 flow [2022-12-12 16:37:37,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 309 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:37:37,945 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 206 flow [2022-12-12 16:37:37,945 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2022-12-12 16:37:37,946 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2022-12-12 16:37:37,946 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 206 flow [2022-12-12 16:37:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:37,946 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:37,946 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:37,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:38,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:38,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash 229454201, now seen corresponding path program 3 times [2022-12-12 16:37:38,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:38,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703048927] [2022-12-12 16:37:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:38,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703048927] [2022-12-12 16:37:38,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703048927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:38,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634973127] [2022-12-12 16:37:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:37:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:38,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:38,283 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) [2022-12-12 16:37:38,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 16:37:38,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:37:38,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 16:37:38,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:38,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 16:37:38,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634973127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:37:38,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 16:37:38,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2022-12-12 16:37:38,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693088321] [2022-12-12 16:37:38,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:37:38,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:37:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:37:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-12 16:37:38,388 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:37:38,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:38,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:38,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:37:38,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:38,451 INFO L130 PetriNetUnfolder]: 102/191 cut-off events. [2022-12-12 16:37:38,452 INFO L131 PetriNetUnfolder]: For 548/548 co-relation queries the response was YES. [2022-12-12 16:37:38,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 191 events. 102/191 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 592 event pairs, 31 based on Foata normal form. 4/194 useless extension candidates. Maximal degree in co-relation 795. Up to 134 conditions per place. [2022-12-12 16:37:38,454 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 31 selfloop transitions, 12 changer transitions 6/49 dead transitions. [2022-12-12 16:37:38,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 415 flow [2022-12-12 16:37:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:37:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:37:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2022-12-12 16:37:38,456 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2022-12-12 16:37:38,456 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 206 flow. Second operand 5 states and 38 transitions. [2022-12-12 16:37:38,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 415 flow [2022-12-12 16:37:38,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 373 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-12-12 16:37:38,458 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 262 flow [2022-12-12 16:37:38,459 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2022-12-12 16:37:38,460 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-12-12 16:37:38,461 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 262 flow [2022-12-12 16:37:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:38,461 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:38,461 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:38,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1878511076, now seen corresponding path program 1 times [2022-12-12 16:37:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:38,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143865336] [2022-12-12 16:37:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:37:38,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:38,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143865336] [2022-12-12 16:37:38,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143865336] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192887438] [2022-12-12 16:37:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:38,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:38,735 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) [2022-12-12 16:37:38,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 16:37:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 16:37:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:38,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:37:38,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:37:38,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:37:38,943 INFO L321 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-12-12 16:37:38,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2022-12-12 16:37:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:38,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:37:41,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:41,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2022-12-12 16:37:41,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:41,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 258 [2022-12-12 16:37:41,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:41,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 198 [2022-12-12 16:37:41,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:41,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 105 [2022-12-12 16:37:41,840 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:37:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:41,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192887438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:37:41,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:37:41,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2022-12-12 16:37:41,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035879195] [2022-12-12 16:37:41,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:37:41,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 16:37:41,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 16:37:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=163, Unknown=5, NotChecked=0, Total=210 [2022-12-12 16:37:41,947 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 16:37:41,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 262 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:41,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:41,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 16:37:41,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:42,580 INFO L130 PetriNetUnfolder]: 263/467 cut-off events. [2022-12-12 16:37:42,580 INFO L131 PetriNetUnfolder]: For 1117/1157 co-relation queries the response was YES. [2022-12-12 16:37:42,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 467 events. 263/467 cut-off events. For 1117/1157 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1865 event pairs, 10 based on Foata normal form. 54/513 useless extension candidates. Maximal degree in co-relation 1552. Up to 227 conditions per place. [2022-12-12 16:37:42,582 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 37 selfloop transitions, 21 changer transitions 79/140 dead transitions. [2022-12-12 16:37:42,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 140 transitions, 1099 flow [2022-12-12 16:37:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 16:37:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 16:37:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 141 transitions. [2022-12-12 16:37:42,584 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2022-12-12 16:37:42,584 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 262 flow. Second operand 21 states and 141 transitions. [2022-12-12 16:37:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 140 transitions, 1099 flow [2022-12-12 16:37:42,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 140 transitions, 1067 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-12 16:37:42,589 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 403 flow [2022-12-12 16:37:42,589 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=403, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2022-12-12 16:37:42,590 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2022-12-12 16:37:42,590 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 403 flow [2022-12-12 16:37:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:42,590 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:42,590 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:42,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-12 16:37:42,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:42,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1638650033, now seen corresponding path program 2 times [2022-12-12 16:37:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:42,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584793673] [2022-12-12 16:37:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:42,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584793673] [2022-12-12 16:37:43,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584793673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154802227] [2022-12-12 16:37:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:37:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:43,338 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) [2022-12-12 16:37:43,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 16:37:43,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:37:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 16:37:43,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:43,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:37:43,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:37:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:37:43,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 16:37:43,617 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-12 16:37:43,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2022-12-12 16:37:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:43,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:37:43,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:43,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 103 [2022-12-12 16:37:43,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:43,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 494 [2022-12-12 16:37:43,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:43,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 356 treesize of output 398 [2022-12-12 16:37:44,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:44,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 272 treesize of output 256 [2022-12-12 16:37:45,809 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:37:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:45,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154802227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:37:45,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:37:45,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-12 16:37:45,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117469971] [2022-12-12 16:37:45,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:37:45,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 16:37:45,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 16:37:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=360, Unknown=4, NotChecked=0, Total=462 [2022-12-12 16:37:45,927 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:37:45,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 403 flow. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:45,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:45,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:37:45,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:47,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:37:50,522 INFO L130 PetriNetUnfolder]: 225/417 cut-off events. [2022-12-12 16:37:50,522 INFO L131 PetriNetUnfolder]: For 2629/2708 co-relation queries the response was YES. [2022-12-12 16:37:50,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 417 events. 225/417 cut-off events. For 2629/2708 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1561 event pairs, 18 based on Foata normal form. 35/436 useless extension candidates. Maximal degree in co-relation 2294. Up to 196 conditions per place. [2022-12-12 16:37:50,525 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 51 selfloop transitions, 37 changer transitions 27/120 dead transitions. [2022-12-12 16:37:50,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 1239 flow [2022-12-12 16:37:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:37:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:37:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 120 transitions. [2022-12-12 16:37:50,526 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2022-12-12 16:37:50,526 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 403 flow. Second operand 16 states and 120 transitions. [2022-12-12 16:37:50,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 1239 flow [2022-12-12 16:37:50,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 997 flow, removed 92 selfloop flow, removed 12 redundant places. [2022-12-12 16:37:50,535 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 644 flow [2022-12-12 16:37:50,536 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=644, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2022-12-12 16:37:50,536 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2022-12-12 16:37:50,536 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 644 flow [2022-12-12 16:37:50,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:50,537 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:50,537 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:50,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:50,741 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash -837758783, now seen corresponding path program 3 times [2022-12-12 16:37:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:50,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716465385] [2022-12-12 16:37:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716465385] [2022-12-12 16:37:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716465385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642355314] [2022-12-12 16:37:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:37:51,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:51,240 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) [2022-12-12 16:37:51,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 16:37:51,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:37:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 16:37:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:51,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:51,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-12 16:37:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:37:51,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:37:51,477 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-12 16:37:51,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-12-12 16:37:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:37:51,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642355314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:37:51,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:37:51,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 3] total 13 [2022-12-12 16:37:51,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819838546] [2022-12-12 16:37:51,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:37:51,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 16:37:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 16:37:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-12 16:37:51,525 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:37:51,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 644 flow. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:51,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:51,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:37:51,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:51,834 INFO L130 PetriNetUnfolder]: 268/484 cut-off events. [2022-12-12 16:37:51,834 INFO L131 PetriNetUnfolder]: For 1833/1891 co-relation queries the response was YES. [2022-12-12 16:37:51,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2456 conditions, 484 events. 268/484 cut-off events. For 1833/1891 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1850 event pairs, 34 based on Foata normal form. 31/500 useless extension candidates. Maximal degree in co-relation 2416. Up to 293 conditions per place. [2022-12-12 16:37:51,837 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 72 selfloop transitions, 44 changer transitions 1/122 dead transitions. [2022-12-12 16:37:51,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 122 transitions, 1232 flow [2022-12-12 16:37:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 16:37:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 16:37:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2022-12-12 16:37:51,840 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45701357466063347 [2022-12-12 16:37:51,840 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 644 flow. Second operand 13 states and 101 transitions. [2022-12-12 16:37:51,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 122 transitions, 1232 flow [2022-12-12 16:37:51,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 122 transitions, 1116 flow, removed 54 selfloop flow, removed 6 redundant places. [2022-12-12 16:37:51,847 INFO L231 Difference]: Finished difference. Result has 69 places, 88 transitions, 895 flow [2022-12-12 16:37:51,848 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=895, PETRI_PLACES=69, PETRI_TRANSITIONS=88} [2022-12-12 16:37:51,848 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2022-12-12 16:37:51,848 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 88 transitions, 895 flow [2022-12-12 16:37:51,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:51,849 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:51,849 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:51,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:52,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:52,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:52,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1286528389, now seen corresponding path program 4 times [2022-12-12 16:37:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225164506] [2022-12-12 16:37:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:52,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225164506] [2022-12-12 16:37:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225164506] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307382565] [2022-12-12 16:37:52,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:37:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:52,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:52,697 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) [2022-12-12 16:37:52,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 16:37:52,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:37:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 16:37:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:52,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:52,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-12 16:37:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:37:52,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:37:52,973 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-12 16:37:52,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-12-12 16:37:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:37:53,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307382565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:37:53,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:37:53,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2022-12-12 16:37:53,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757936199] [2022-12-12 16:37:53,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:37:53,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:37:53,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:37:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:37:53,018 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:37:53,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 88 transitions, 895 flow. Second operand has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:53,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:53,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:37:53,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:53,317 INFO L130 PetriNetUnfolder]: 336/608 cut-off events. [2022-12-12 16:37:53,317 INFO L131 PetriNetUnfolder]: For 2699/2750 co-relation queries the response was YES. [2022-12-12 16:37:53,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3104 conditions, 608 events. 336/608 cut-off events. For 2699/2750 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2505 event pairs, 57 based on Foata normal form. 22/609 useless extension candidates. Maximal degree in co-relation 2705. Up to 458 conditions per place. [2022-12-12 16:37:53,321 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 92 selfloop transitions, 31 changer transitions 1/129 dead transitions. [2022-12-12 16:37:53,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1388 flow [2022-12-12 16:37:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:37:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:37:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2022-12-12 16:37:53,322 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2022-12-12 16:37:53,322 INFO L175 Difference]: Start difference. First operand has 69 places, 88 transitions, 895 flow. Second operand 12 states and 89 transitions. [2022-12-12 16:37:53,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1388 flow [2022-12-12 16:37:53,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 1310 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-12-12 16:37:53,328 INFO L231 Difference]: Finished difference. Result has 80 places, 100 transitions, 1053 flow [2022-12-12 16:37:53,329 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1053, PETRI_PLACES=80, PETRI_TRANSITIONS=100} [2022-12-12 16:37:53,329 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2022-12-12 16:37:53,329 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 100 transitions, 1053 flow [2022-12-12 16:37:53,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:53,329 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:53,329 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:53,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:53,534 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,SelfDestructingSolverStorable11 [2022-12-12 16:37:53,534 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1129614377, now seen corresponding path program 5 times [2022-12-12 16:37:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699539120] [2022-12-12 16:37:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:37:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:54,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699539120] [2022-12-12 16:37:54,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699539120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:54,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263775462] [2022-12-12 16:37:54,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:37:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:54,190 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) [2022-12-12 16:37:54,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 16:37:54,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:37:54,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:37:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 16:37:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:37:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:37:54,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-12-12 16:37:54,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:37:54,456 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-12 16:37:54,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2022-12-12 16:37:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:37:54,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:37:54,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:54,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 112 [2022-12-12 16:37:54,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:37:54,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-12-12 16:37:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:37:54,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263775462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:37:54,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:37:54,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2022-12-12 16:37:54,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287495720] [2022-12-12 16:37:54,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:37:54,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:37:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:37:54,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:37:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=316, Unknown=3, NotChecked=0, Total=380 [2022-12-12 16:37:54,740 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:37:54,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 100 transitions, 1053 flow. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:54,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:37:54,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:37:54,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:37:57,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:37:59,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:37:59,516 INFO L130 PetriNetUnfolder]: 540/980 cut-off events. [2022-12-12 16:37:59,516 INFO L131 PetriNetUnfolder]: For 4344/4425 co-relation queries the response was YES. [2022-12-12 16:37:59,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 980 events. 540/980 cut-off events. For 4344/4425 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4595 event pairs, 63 based on Foata normal form. 47/1010 useless extension candidates. Maximal degree in co-relation 4501. Up to 546 conditions per place. [2022-12-12 16:37:59,522 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 101 selfloop transitions, 72 changer transitions 2/180 dead transitions. [2022-12-12 16:37:59,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 180 transitions, 2007 flow [2022-12-12 16:37:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 16:37:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 16:37:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2022-12-12 16:37:59,532 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47843137254901963 [2022-12-12 16:37:59,532 INFO L175 Difference]: Start difference. First operand has 80 places, 100 transitions, 1053 flow. Second operand 15 states and 122 transitions. [2022-12-12 16:37:59,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 180 transitions, 2007 flow [2022-12-12 16:37:59,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 180 transitions, 1914 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-12-12 16:37:59,546 INFO L231 Difference]: Finished difference. Result has 94 places, 134 transitions, 1613 flow [2022-12-12 16:37:59,546 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1613, PETRI_PLACES=94, PETRI_TRANSITIONS=134} [2022-12-12 16:37:59,547 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2022-12-12 16:37:59,547 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 134 transitions, 1613 flow [2022-12-12 16:37:59,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:37:59,547 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:37:59,547 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:37:59,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 16:37:59,751 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,SelfDestructingSolverStorable12 [2022-12-12 16:37:59,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:37:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:37:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1428951978, now seen corresponding path program 6 times [2022-12-12 16:37:59,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:37:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960124779] [2022-12-12 16:37:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:37:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:37:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:37:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:37:59,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:37:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960124779] [2022-12-12 16:37:59,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960124779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:37:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474256637] [2022-12-12 16:37:59,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:37:59,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:37:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:37:59,961 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) [2022-12-12 16:37:59,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 16:38:00,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:38:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:00,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:00,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:00,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474256637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:00,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:00,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-12 16:38:00,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642400360] [2022-12-12 16:38:00,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:00,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:00,212 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:00,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 134 transitions, 1613 flow. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:00,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:00,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:00,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:01,211 INFO L130 PetriNetUnfolder]: 793/1516 cut-off events. [2022-12-12 16:38:01,211 INFO L131 PetriNetUnfolder]: For 7968/7968 co-relation queries the response was YES. [2022-12-12 16:38:01,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7482 conditions, 1516 events. 793/1516 cut-off events. For 7968/7968 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8467 event pairs, 71 based on Foata normal form. 36/1551 useless extension candidates. Maximal degree in co-relation 6609. Up to 531 conditions per place. [2022-12-12 16:38:01,221 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 178 selfloop transitions, 107 changer transitions 25/310 dead transitions. [2022-12-12 16:38:01,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 310 transitions, 3734 flow [2022-12-12 16:38:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 16:38:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 16:38:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 130 transitions. [2022-12-12 16:38:01,223 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33248081841432225 [2022-12-12 16:38:01,223 INFO L175 Difference]: Start difference. First operand has 94 places, 134 transitions, 1613 flow. Second operand 23 states and 130 transitions. [2022-12-12 16:38:01,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 310 transitions, 3734 flow [2022-12-12 16:38:01,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 310 transitions, 3535 flow, removed 88 selfloop flow, removed 5 redundant places. [2022-12-12 16:38:01,238 INFO L231 Difference]: Finished difference. Result has 123 places, 197 transitions, 2589 flow [2022-12-12 16:38:01,238 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2589, PETRI_PLACES=123, PETRI_TRANSITIONS=197} [2022-12-12 16:38:01,239 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2022-12-12 16:38:01,239 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 197 transitions, 2589 flow [2022-12-12 16:38:01,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:01,239 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:01,239 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:01,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:01,443 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,SelfDestructingSolverStorable13 [2022-12-12 16:38:01,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:01,444 INFO L85 PathProgramCache]: Analyzing trace with hash -745718012, now seen corresponding path program 7 times [2022-12-12 16:38:01,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:01,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495965154] [2022-12-12 16:38:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:01,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:01,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495965154] [2022-12-12 16:38:01,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495965154] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751149902] [2022-12-12 16:38:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:38:01,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:01,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:01,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 16:38:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:01,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:01,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751149902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-12 16:38:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910193270] [2022-12-12 16:38:01,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:01,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:38:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:38:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:38:01,907 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:01,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 197 transitions, 2589 flow. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:01,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:01,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:01,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:03,101 INFO L130 PetriNetUnfolder]: 723/1393 cut-off events. [2022-12-12 16:38:03,102 INFO L131 PetriNetUnfolder]: For 9688/9688 co-relation queries the response was YES. [2022-12-12 16:38:03,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8318 conditions, 1393 events. 723/1393 cut-off events. For 9688/9688 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7675 event pairs, 136 based on Foata normal form. 78/1470 useless extension candidates. Maximal degree in co-relation 7908. Up to 591 conditions per place. [2022-12-12 16:38:03,114 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 135 selfloop transitions, 173 changer transitions 6/314 dead transitions. [2022-12-12 16:38:03,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 314 transitions, 4575 flow [2022-12-12 16:38:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 16:38:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 16:38:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 136 transitions. [2022-12-12 16:38:03,116 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2022-12-12 16:38:03,116 INFO L175 Difference]: Start difference. First operand has 123 places, 197 transitions, 2589 flow. Second operand 22 states and 136 transitions. [2022-12-12 16:38:03,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 314 transitions, 4575 flow [2022-12-12 16:38:03,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 314 transitions, 3802 flow, removed 361 selfloop flow, removed 8 redundant places. [2022-12-12 16:38:03,149 INFO L231 Difference]: Finished difference. Result has 137 places, 252 transitions, 3476 flow [2022-12-12 16:38:03,150 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3476, PETRI_PLACES=137, PETRI_TRANSITIONS=252} [2022-12-12 16:38:03,150 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2022-12-12 16:38:03,150 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 252 transitions, 3476 flow [2022-12-12 16:38:03,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:03,150 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:03,150 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:03,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:03,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 16:38:03,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -279194474, now seen corresponding path program 8 times [2022-12-12 16:38:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:03,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343248633] [2022-12-12 16:38:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:03,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343248633] [2022-12-12 16:38:03,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343248633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:03,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454667441] [2022-12-12 16:38:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:38:03,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:03,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:03,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:03,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 16:38:03,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:38:03,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:03,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:03,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454667441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:03,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:03,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:38:03,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579719194] [2022-12-12 16:38:03,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:38:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:38:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:38:03,806 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:03,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 252 transitions, 3476 flow. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:03,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:03,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:03,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:05,083 INFO L130 PetriNetUnfolder]: 718/1459 cut-off events. [2022-12-12 16:38:05,084 INFO L131 PetriNetUnfolder]: For 8855/8855 co-relation queries the response was YES. [2022-12-12 16:38:05,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8464 conditions, 1459 events. 718/1459 cut-off events. For 8855/8855 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8535 event pairs, 73 based on Foata normal form. 24/1482 useless extension candidates. Maximal degree in co-relation 7946. Up to 409 conditions per place. [2022-12-12 16:38:05,101 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 147 selfloop transitions, 181 changer transitions 11/339 dead transitions. [2022-12-12 16:38:05,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 339 transitions, 4692 flow [2022-12-12 16:38:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 16:38:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 16:38:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 147 transitions. [2022-12-12 16:38:05,102 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28823529411764703 [2022-12-12 16:38:05,102 INFO L175 Difference]: Start difference. First operand has 137 places, 252 transitions, 3476 flow. Second operand 30 states and 147 transitions. [2022-12-12 16:38:05,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 339 transitions, 4692 flow [2022-12-12 16:38:05,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 339 transitions, 4299 flow, removed 186 selfloop flow, removed 1 redundant places. [2022-12-12 16:38:05,144 INFO L231 Difference]: Finished difference. Result has 168 places, 260 transitions, 3626 flow [2022-12-12 16:38:05,145 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2951, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3626, PETRI_PLACES=168, PETRI_TRANSITIONS=260} [2022-12-12 16:38:05,146 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 147 predicate places. [2022-12-12 16:38:05,146 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 260 transitions, 3626 flow [2022-12-12 16:38:05,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:05,146 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:05,146 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:05,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:05,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 16:38:05,350 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:05,351 INFO L85 PathProgramCache]: Analyzing trace with hash 179520072, now seen corresponding path program 9 times [2022-12-12 16:38:05,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483064238] [2022-12-12 16:38:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:05,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:05,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483064238] [2022-12-12 16:38:05,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483064238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045468637] [2022-12-12 16:38:05,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:38:05,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:05,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:05,488 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:05,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 16:38:05,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 16:38:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:05,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:05,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045468637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:05,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:05,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:38:05,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674510932] [2022-12-12 16:38:05,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:05,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:05,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:05,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:05,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:05,743 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:05,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 260 transitions, 3626 flow. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:05,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:05,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:07,296 INFO L130 PetriNetUnfolder]: 875/1763 cut-off events. [2022-12-12 16:38:07,297 INFO L131 PetriNetUnfolder]: For 11608/11608 co-relation queries the response was YES. [2022-12-12 16:38:07,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10761 conditions, 1763 events. 875/1763 cut-off events. For 11608/11608 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10810 event pairs, 194 based on Foata normal form. 20/1782 useless extension candidates. Maximal degree in co-relation 10275. Up to 906 conditions per place. [2022-12-12 16:38:07,311 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 223 selfloop transitions, 192 changer transitions 3/418 dead transitions. [2022-12-12 16:38:07,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 418 transitions, 6097 flow [2022-12-12 16:38:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 16:38:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 16:38:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 151 transitions. [2022-12-12 16:38:07,313 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30628803245436104 [2022-12-12 16:38:07,313 INFO L175 Difference]: Start difference. First operand has 168 places, 260 transitions, 3626 flow. Second operand 29 states and 151 transitions. [2022-12-12 16:38:07,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 418 transitions, 6097 flow [2022-12-12 16:38:07,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 418 transitions, 5607 flow, removed 64 selfloop flow, removed 17 redundant places. [2022-12-12 16:38:07,357 INFO L231 Difference]: Finished difference. Result has 189 places, 339 transitions, 4916 flow [2022-12-12 16:38:07,358 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4916, PETRI_PLACES=189, PETRI_TRANSITIONS=339} [2022-12-12 16:38:07,358 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2022-12-12 16:38:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 339 transitions, 4916 flow [2022-12-12 16:38:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:07,358 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:07,358 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:07,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 16:38:07,563 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2068095452, now seen corresponding path program 10 times [2022-12-12 16:38:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221427112] [2022-12-12 16:38:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:07,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:07,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221427112] [2022-12-12 16:38:07,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221427112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226788075] [2022-12-12 16:38:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:38:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:07,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:07,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 16:38:07,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:38:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:07,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:07,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226788075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:07,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:07,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:38:07,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080780298] [2022-12-12 16:38:07,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:07,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:07,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:07,950 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:07,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 339 transitions, 4916 flow. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:07,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:07,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:07,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:09,441 INFO L130 PetriNetUnfolder]: 1009/2033 cut-off events. [2022-12-12 16:38:09,441 INFO L131 PetriNetUnfolder]: For 15995/15995 co-relation queries the response was YES. [2022-12-12 16:38:09,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13223 conditions, 2033 events. 1009/2033 cut-off events. For 15995/15995 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12935 event pairs, 187 based on Foata normal form. 12/2044 useless extension candidates. Maximal degree in co-relation 12735. Up to 850 conditions per place. [2022-12-12 16:38:09,460 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 235 selfloop transitions, 252 changer transitions 3/490 dead transitions. [2022-12-12 16:38:09,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 490 transitions, 7381 flow [2022-12-12 16:38:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 16:38:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 16:38:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 161 transitions. [2022-12-12 16:38:09,461 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36425339366515835 [2022-12-12 16:38:09,461 INFO L175 Difference]: Start difference. First operand has 189 places, 339 transitions, 4916 flow. Second operand 26 states and 161 transitions. [2022-12-12 16:38:09,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 490 transitions, 7381 flow [2022-12-12 16:38:09,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 490 transitions, 6961 flow, removed 147 selfloop flow, removed 6 redundant places. [2022-12-12 16:38:09,539 INFO L231 Difference]: Finished difference. Result has 211 places, 392 transitions, 5998 flow [2022-12-12 16:38:09,539 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5998, PETRI_PLACES=211, PETRI_TRANSITIONS=392} [2022-12-12 16:38:09,539 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2022-12-12 16:38:09,539 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 392 transitions, 5998 flow [2022-12-12 16:38:09,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:09,541 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:09,541 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:09,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:09,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:09,758 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1901442326, now seen corresponding path program 11 times [2022-12-12 16:38:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:09,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419648565] [2022-12-12 16:38:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:09,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419648565] [2022-12-12 16:38:09,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419648565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:09,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87891554] [2022-12-12 16:38:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:38:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:09,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:09,949 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:09,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 16:38:10,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:38:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:10,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:10,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87891554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:10,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:10,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-12 16:38:10,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665658994] [2022-12-12 16:38:10,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:10,213 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:10,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 392 transitions, 5998 flow. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:10,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:10,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:10,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:12,320 INFO L130 PetriNetUnfolder]: 972/1988 cut-off events. [2022-12-12 16:38:12,321 INFO L131 PetriNetUnfolder]: For 17545/17545 co-relation queries the response was YES. [2022-12-12 16:38:12,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13374 conditions, 1988 events. 972/1988 cut-off events. For 17545/17545 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12760 event pairs, 92 based on Foata normal form. 32/2019 useless extension candidates. Maximal degree in co-relation 12853. Up to 493 conditions per place. [2022-12-12 16:38:12,337 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 243 selfloop transitions, 264 changer transitions 4/511 dead transitions. [2022-12-12 16:38:12,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 511 transitions, 7782 flow [2022-12-12 16:38:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 16:38:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 16:38:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 207 transitions. [2022-12-12 16:38:12,344 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2767379679144385 [2022-12-12 16:38:12,344 INFO L175 Difference]: Start difference. First operand has 211 places, 392 transitions, 5998 flow. Second operand 44 states and 207 transitions. [2022-12-12 16:38:12,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 511 transitions, 7782 flow [2022-12-12 16:38:12,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 511 transitions, 7469 flow, removed 88 selfloop flow, removed 9 redundant places. [2022-12-12 16:38:12,440 INFO L231 Difference]: Finished difference. Result has 247 places, 399 transitions, 6351 flow [2022-12-12 16:38:12,440 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6351, PETRI_PLACES=247, PETRI_TRANSITIONS=399} [2022-12-12 16:38:12,441 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2022-12-12 16:38:12,441 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 399 transitions, 6351 flow [2022-12-12 16:38:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:12,441 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:12,441 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:12,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:12,642 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1037515248, now seen corresponding path program 12 times [2022-12-12 16:38:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:12,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059991704] [2022-12-12 16:38:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:12,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059991704] [2022-12-12 16:38:12,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059991704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518048061] [2022-12-12 16:38:12,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:38:12,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:12,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:12,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:12,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 16:38:12,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 16:38:12,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:12,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:12,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518048061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:13,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:13,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:38:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387454299] [2022-12-12 16:38:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:13,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:13,018 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:13,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 399 transitions, 6351 flow. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:13,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:13,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:13,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:14,636 INFO L130 PetriNetUnfolder]: 1529/3021 cut-off events. [2022-12-12 16:38:14,636 INFO L131 PetriNetUnfolder]: For 27728/27728 co-relation queries the response was YES. [2022-12-12 16:38:14,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22434 conditions, 3021 events. 1529/3021 cut-off events. For 27728/27728 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20813 event pairs, 301 based on Foata normal form. 90/3106 useless extension candidates. Maximal degree in co-relation 21761. Up to 1514 conditions per place. [2022-12-12 16:38:14,663 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 488 selfloop transitions, 315 changer transitions 9/812 dead transitions. [2022-12-12 16:38:14,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 812 transitions, 14677 flow [2022-12-12 16:38:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 16:38:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 16:38:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 146 transitions. [2022-12-12 16:38:14,665 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2961460446247465 [2022-12-12 16:38:14,665 INFO L175 Difference]: Start difference. First operand has 247 places, 399 transitions, 6351 flow. Second operand 29 states and 146 transitions. [2022-12-12 16:38:14,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 812 transitions, 14677 flow [2022-12-12 16:38:14,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 812 transitions, 13750 flow, removed 253 selfloop flow, removed 22 redundant places. [2022-12-12 16:38:14,900 INFO L231 Difference]: Finished difference. Result has 274 places, 656 transitions, 11869 flow [2022-12-12 16:38:14,900 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11869, PETRI_PLACES=274, PETRI_TRANSITIONS=656} [2022-12-12 16:38:14,900 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2022-12-12 16:38:14,900 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 656 transitions, 11869 flow [2022-12-12 16:38:14,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:14,901 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:14,901 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:14,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:15,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:15,105 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:15,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1106369116, now seen corresponding path program 13 times [2022-12-12 16:38:15,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:15,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973753358] [2022-12-12 16:38:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:15,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:15,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:15,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973753358] [2022-12-12 16:38:15,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973753358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:15,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108304515] [2022-12-12 16:38:15,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:38:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:15,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:15,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:15,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 16:38:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:15,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:15,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:15,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108304515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:15,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:15,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:38:15,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453869261] [2022-12-12 16:38:15,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:15,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:15,470 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:15,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 656 transitions, 11869 flow. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:15,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:15,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:15,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:17,408 INFO L130 PetriNetUnfolder]: 1898/3719 cut-off events. [2022-12-12 16:38:17,409 INFO L131 PetriNetUnfolder]: For 52147/52147 co-relation queries the response was YES. [2022-12-12 16:38:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30704 conditions, 3719 events. 1898/3719 cut-off events. For 52147/52147 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26756 event pairs, 441 based on Foata normal form. 72/3790 useless extension candidates. Maximal degree in co-relation 29951. Up to 2253 conditions per place. [2022-12-12 16:38:17,484 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 481 selfloop transitions, 459 changer transitions 2/942 dead transitions. [2022-12-12 16:38:17,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 942 transitions, 18464 flow [2022-12-12 16:38:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 16:38:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 16:38:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 165 transitions. [2022-12-12 16:38:17,486 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2696078431372549 [2022-12-12 16:38:17,486 INFO L175 Difference]: Start difference. First operand has 274 places, 656 transitions, 11869 flow. Second operand 36 states and 165 transitions. [2022-12-12 16:38:17,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 942 transitions, 18464 flow [2022-12-12 16:38:17,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 942 transitions, 17862 flow, removed 278 selfloop flow, removed 3 redundant places. [2022-12-12 16:38:17,999 INFO L231 Difference]: Finished difference. Result has 325 places, 839 transitions, 16678 flow [2022-12-12 16:38:18,000 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=11298, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16678, PETRI_PLACES=325, PETRI_TRANSITIONS=839} [2022-12-12 16:38:18,000 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 304 predicate places. [2022-12-12 16:38:18,000 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 839 transitions, 16678 flow [2022-12-12 16:38:18,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:18,001 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:18,001 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:18,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:18,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:18,201 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -651518186, now seen corresponding path program 14 times [2022-12-12 16:38:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:18,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223088029] [2022-12-12 16:38:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:18,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:18,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223088029] [2022-12-12 16:38:18,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223088029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566866831] [2022-12-12 16:38:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:38:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:18,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:18,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:18,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 16:38:18,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:38:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:18,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:18,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566866831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:18,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:18,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:38:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749823729] [2022-12-12 16:38:18,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:38:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:38:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:38:18,595 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:18,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 839 transitions, 16678 flow. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:18,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:18,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:18,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:23,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-12 16:38:25,057 INFO L130 PetriNetUnfolder]: 2347/4662 cut-off events. [2022-12-12 16:38:25,057 INFO L131 PetriNetUnfolder]: For 86805/86805 co-relation queries the response was YES. [2022-12-12 16:38:25,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42143 conditions, 4662 events. 2347/4662 cut-off events. For 86805/86805 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35590 event pairs, 158 based on Foata normal form. 58/4719 useless extension candidates. Maximal degree in co-relation 41326. Up to 1101 conditions per place. [2022-12-12 16:38:25,106 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 475 selfloop transitions, 716 changer transitions 21/1212 dead transitions. [2022-12-12 16:38:25,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1212 transitions, 25349 flow [2022-12-12 16:38:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-12 16:38:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-12 16:38:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 245 transitions. [2022-12-12 16:38:25,108 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27714932126696834 [2022-12-12 16:38:25,108 INFO L175 Difference]: Start difference. First operand has 325 places, 839 transitions, 16678 flow. Second operand 52 states and 245 transitions. [2022-12-12 16:38:25,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1212 transitions, 25349 flow [2022-12-12 16:38:26,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1212 transitions, 24344 flow, removed 481 selfloop flow, removed 6 redundant places. [2022-12-12 16:38:26,184 INFO L231 Difference]: Finished difference. Result has 385 places, 1036 transitions, 22440 flow [2022-12-12 16:38:26,185 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=15787, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=22440, PETRI_PLACES=385, PETRI_TRANSITIONS=1036} [2022-12-12 16:38:26,185 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 364 predicate places. [2022-12-12 16:38:26,186 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1036 transitions, 22440 flow [2022-12-12 16:38:26,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:26,186 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:26,186 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:26,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-12 16:38:26,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:26,390 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -976947704, now seen corresponding path program 15 times [2022-12-12 16:38:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:26,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6008714] [2022-12-12 16:38:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:26,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6008714] [2022-12-12 16:38:26,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6008714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403272035] [2022-12-12 16:38:26,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:38:26,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:26,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 16:38:26,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 16:38:26,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:26,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:26,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403272035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:26,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:26,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:38:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781412051] [2022-12-12 16:38:26,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:38:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:38:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:38:26,825 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:26,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1036 transitions, 22440 flow. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:26,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:26,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:30,957 INFO L130 PetriNetUnfolder]: 2469/4990 cut-off events. [2022-12-12 16:38:30,958 INFO L131 PetriNetUnfolder]: For 105317/105317 co-relation queries the response was YES. [2022-12-12 16:38:30,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48195 conditions, 4990 events. 2469/4990 cut-off events. For 105317/105317 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 39047 event pairs, 316 based on Foata normal form. 36/5025 useless extension candidates. Maximal degree in co-relation 47349. Up to 1654 conditions per place. [2022-12-12 16:38:31,011 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 496 selfloop transitions, 714 changer transitions 0/1210 dead transitions. [2022-12-12 16:38:31,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1210 transitions, 27879 flow [2022-12-12 16:38:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 16:38:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 16:38:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 162 transitions. [2022-12-12 16:38:31,013 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30740037950664134 [2022-12-12 16:38:31,013 INFO L175 Difference]: Start difference. First operand has 385 places, 1036 transitions, 22440 flow. Second operand 31 states and 162 transitions. [2022-12-12 16:38:31,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1210 transitions, 27879 flow [2022-12-12 16:38:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1210 transitions, 26462 flow, removed 568 selfloop flow, removed 17 redundant places. [2022-12-12 16:38:32,501 INFO L231 Difference]: Finished difference. Result has 402 places, 1117 transitions, 25561 flow [2022-12-12 16:38:32,502 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=21117, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=640, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25561, PETRI_PLACES=402, PETRI_TRANSITIONS=1117} [2022-12-12 16:38:32,503 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 381 predicate places. [2022-12-12 16:38:32,503 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1117 transitions, 25561 flow [2022-12-12 16:38:32,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:32,503 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:32,503 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:32,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-12 16:38:32,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:32,707 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:32,707 INFO L85 PathProgramCache]: Analyzing trace with hash -936266064, now seen corresponding path program 16 times [2022-12-12 16:38:32,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:32,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516562241] [2022-12-12 16:38:32,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:32,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:32,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516562241] [2022-12-12 16:38:32,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516562241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019795999] [2022-12-12 16:38:32,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:38:32,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:32,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:32,823 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:32,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 16:38:32,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:38:32,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:33,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019795999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:33,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:33,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 16:38:33,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164173898] [2022-12-12 16:38:33,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:33,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 16:38:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 16:38:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-12 16:38:33,023 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:33,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1117 transitions, 25561 flow. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:33,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:33,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:33,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:35,848 INFO L130 PetriNetUnfolder]: 3162/6370 cut-off events. [2022-12-12 16:38:35,849 INFO L131 PetriNetUnfolder]: For 151233/151233 co-relation queries the response was YES. [2022-12-12 16:38:35,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63891 conditions, 6370 events. 3162/6370 cut-off events. For 151233/151233 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51695 event pairs, 73 based on Foata normal form. 34/6403 useless extension candidates. Maximal degree in co-relation 62866. Up to 3214 conditions per place. [2022-12-12 16:38:35,928 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 1219 selfloop transitions, 329 changer transitions 8/1556 dead transitions. [2022-12-12 16:38:35,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1556 transitions, 38821 flow [2022-12-12 16:38:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:38:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:38:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 84 transitions. [2022-12-12 16:38:35,929 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 16:38:35,929 INFO L175 Difference]: Start difference. First operand has 402 places, 1117 transitions, 25561 flow. Second operand 14 states and 84 transitions. [2022-12-12 16:38:35,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1556 transitions, 38821 flow [2022-12-12 16:38:38,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1556 transitions, 37783 flow, removed 312 selfloop flow, removed 16 redundant places. [2022-12-12 16:38:38,486 INFO L231 Difference]: Finished difference. Result has 407 places, 1316 transitions, 31152 flow [2022-12-12 16:38:38,487 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=24727, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=31152, PETRI_PLACES=407, PETRI_TRANSITIONS=1316} [2022-12-12 16:38:38,488 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 386 predicate places. [2022-12-12 16:38:38,488 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1316 transitions, 31152 flow [2022-12-12 16:38:38,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:38,488 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:38,488 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:38,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-12 16:38:38,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-12 16:38:38,688 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash -306897312, now seen corresponding path program 17 times [2022-12-12 16:38:38,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:38,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466823472] [2022-12-12 16:38:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:38,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:38,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466823472] [2022-12-12 16:38:38,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466823472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606272320] [2022-12-12 16:38:38,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:38:38,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:38,897 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 16:38:38,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 16:38:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:38,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:39,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606272320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:39,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:38:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584103261] [2022-12-12 16:38:39,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:39,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:38:39,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:38:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:38:39,192 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:39,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1316 transitions, 31152 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:39,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:39,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:39,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:45,659 INFO L130 PetriNetUnfolder]: 3981/8169 cut-off events. [2022-12-12 16:38:45,659 INFO L131 PetriNetUnfolder]: For 199513/199513 co-relation queries the response was YES. [2022-12-12 16:38:45,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83308 conditions, 8169 events. 3981/8169 cut-off events. For 199513/199513 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 70091 event pairs, 80 based on Foata normal form. 20/8188 useless extension candidates. Maximal degree in co-relation 82311. Up to 2280 conditions per place. [2022-12-12 16:38:45,764 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1087 selfloop transitions, 896 changer transitions 20/2003 dead transitions. [2022-12-12 16:38:45,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2003 transitions, 49829 flow [2022-12-12 16:38:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 16:38:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 16:38:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 220 transitions. [2022-12-12 16:38:45,765 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3806228373702422 [2022-12-12 16:38:45,765 INFO L175 Difference]: Start difference. First operand has 407 places, 1316 transitions, 31152 flow. Second operand 34 states and 220 transitions. [2022-12-12 16:38:45,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2003 transitions, 49829 flow [2022-12-12 16:38:49,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 2003 transitions, 49396 flow, removed 177 selfloop flow, removed 3 redundant places. [2022-12-12 16:38:49,392 INFO L231 Difference]: Finished difference. Result has 456 places, 1632 transitions, 42500 flow [2022-12-12 16:38:49,393 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=30787, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=42500, PETRI_PLACES=456, PETRI_TRANSITIONS=1632} [2022-12-12 16:38:49,393 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 435 predicate places. [2022-12-12 16:38:49,393 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1632 transitions, 42500 flow [2022-12-12 16:38:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:49,393 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:38:49,393 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:38:49,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 16:38:49,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-12 16:38:49,597 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:38:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:38:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2054378672, now seen corresponding path program 18 times [2022-12-12 16:38:49,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:38:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178820278] [2022-12-12 16:38:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:38:49,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:38:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:38:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:49,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:38:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178820278] [2022-12-12 16:38:49,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178820278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:38:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27807569] [2022-12-12 16:38:49,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:38:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:38:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:38:49,753 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:38:49,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 16:38:49,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 16:38:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:38:49,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:38:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:38:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:49,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:38:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:38:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27807569] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:38:49,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:38:49,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 16:38:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537772827] [2022-12-12 16:38:49,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:38:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:38:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:38:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:38:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:38:49,989 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:38:49,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1632 transitions, 42500 flow. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:38:49,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:38:49,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:38:49,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:38:58,509 INFO L130 PetriNetUnfolder]: 4123/8469 cut-off events. [2022-12-12 16:38:58,509 INFO L131 PetriNetUnfolder]: For 254165/254165 co-relation queries the response was YES. [2022-12-12 16:38:58,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92232 conditions, 8469 events. 4123/8469 cut-off events. For 254165/254165 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 73414 event pairs, 25 based on Foata normal form. 74/8542 useless extension candidates. Maximal degree in co-relation 91340. Up to 2884 conditions per place. [2022-12-12 16:38:58,622 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 803 selfloop transitions, 1243 changer transitions 11/2057 dead transitions. [2022-12-12 16:38:58,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 2057 transitions, 54876 flow [2022-12-12 16:38:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-12 16:38:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-12 16:38:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 282 transitions. [2022-12-12 16:38:58,624 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2811565304087737 [2022-12-12 16:38:58,624 INFO L175 Difference]: Start difference. First operand has 456 places, 1632 transitions, 42500 flow. Second operand 59 states and 282 transitions. [2022-12-12 16:38:58,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 2057 transitions, 54876 flow [2022-12-12 16:39:03,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 2057 transitions, 53666 flow, removed 458 selfloop flow, removed 16 redundant places. [2022-12-12 16:39:03,371 INFO L231 Difference]: Finished difference. Result has 514 places, 1858 transitions, 50920 flow [2022-12-12 16:39:03,372 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=41384, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=50920, PETRI_PLACES=514, PETRI_TRANSITIONS=1858} [2022-12-12 16:39:03,373 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 493 predicate places. [2022-12-12 16:39:03,373 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1858 transitions, 50920 flow [2022-12-12 16:39:03,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:03,373 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:03,373 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:03,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 16:39:03,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 16:39:03,574 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1239302240, now seen corresponding path program 19 times [2022-12-12 16:39:03,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:03,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785305035] [2022-12-12 16:39:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:03,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:39:03,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785305035] [2022-12-12 16:39:03,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785305035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613552561] [2022-12-12 16:39:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:39:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:03,713 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:39:03,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 16:39:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:39:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:39:03,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:39:03,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613552561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:03,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:03,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:39:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958451770] [2022-12-12 16:39:03,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:03,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:39:03,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:39:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:39:03,941 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:03,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1858 transitions, 50920 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:03,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:03,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:03,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:11,221 INFO L130 PetriNetUnfolder]: 4278/8748 cut-off events. [2022-12-12 16:39:11,221 INFO L131 PetriNetUnfolder]: For 317341/317341 co-relation queries the response was YES. [2022-12-12 16:39:11,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102071 conditions, 8748 events. 4278/8748 cut-off events. For 317341/317341 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 75694 event pairs, 113 based on Foata normal form. 44/8791 useless extension candidates. Maximal degree in co-relation 101129. Up to 4606 conditions per place. [2022-12-12 16:39:11,351 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 1457 selfloop transitions, 616 changer transitions 3/2076 dead transitions. [2022-12-12 16:39:11,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2076 transitions, 60319 flow [2022-12-12 16:39:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 16:39:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 16:39:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 152 transitions. [2022-12-12 16:39:11,352 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27941176470588236 [2022-12-12 16:39:11,352 INFO L175 Difference]: Start difference. First operand has 514 places, 1858 transitions, 50920 flow. Second operand 32 states and 152 transitions. [2022-12-12 16:39:11,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 2076 transitions, 60319 flow [2022-12-12 16:39:17,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 2076 transitions, 58719 flow, removed 713 selfloop flow, removed 13 redundant places. [2022-12-12 16:39:17,819 INFO L231 Difference]: Finished difference. Result has 540 places, 1951 transitions, 54134 flow [2022-12-12 16:39:17,821 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=49489, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=54134, PETRI_PLACES=540, PETRI_TRANSITIONS=1951} [2022-12-12 16:39:17,821 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 519 predicate places. [2022-12-12 16:39:17,821 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1951 transitions, 54134 flow [2022-12-12 16:39:17,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:17,821 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:17,821 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:17,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 16:39:18,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:18,022 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash 73943466, now seen corresponding path program 20 times [2022-12-12 16:39:18,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:18,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869236960] [2022-12-12 16:39:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:39:18,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869236960] [2022-12-12 16:39:18,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869236960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765571936] [2022-12-12 16:39:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:39:18,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:18,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:18,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:39:18,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 16:39:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:39:18,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:39:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:39:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:39:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:39:18,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765571936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:18,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:18,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:39:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139416663] [2022-12-12 16:39:18,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:18,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:39:18,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:39:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:39:18,398 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:18,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1951 transitions, 54134 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:18,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:18,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:18,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:28,599 INFO L130 PetriNetUnfolder]: 4303/8921 cut-off events. [2022-12-12 16:39:28,599 INFO L131 PetriNetUnfolder]: For 370171/370171 co-relation queries the response was YES. [2022-12-12 16:39:28,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106543 conditions, 8921 events. 4303/8921 cut-off events. For 370171/370171 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 78512 event pairs, 43 based on Foata normal form. 56/8976 useless extension candidates. Maximal degree in co-relation 105548. Up to 2231 conditions per place. [2022-12-12 16:39:28,862 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 892 selfloop transitions, 1314 changer transitions 26/2232 dead transitions. [2022-12-12 16:39:28,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 2232 transitions, 63873 flow [2022-12-12 16:39:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-12 16:39:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-12 16:39:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 247 transitions. [2022-12-12 16:39:28,863 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2965186074429772 [2022-12-12 16:39:28,863 INFO L175 Difference]: Start difference. First operand has 540 places, 1951 transitions, 54134 flow. Second operand 49 states and 247 transitions. [2022-12-12 16:39:28,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 2232 transitions, 63873 flow [2022-12-12 16:39:36,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 2232 transitions, 62560 flow, removed 575 selfloop flow, removed 11 redundant places. [2022-12-12 16:39:36,117 INFO L231 Difference]: Finished difference. Result has 587 places, 2024 transitions, 59006 flow [2022-12-12 16:39:36,118 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=52637, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=59006, PETRI_PLACES=587, PETRI_TRANSITIONS=2024} [2022-12-12 16:39:36,123 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 566 predicate places. [2022-12-12 16:39:36,123 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 2024 transitions, 59006 flow [2022-12-12 16:39:36,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:36,123 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:36,123 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:36,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-12 16:39:36,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 16:39:36,328 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:36,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1957030449, now seen corresponding path program 21 times [2022-12-12 16:39:36,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:36,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194862893] [2022-12-12 16:39:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:36,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:39:36,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194862893] [2022-12-12 16:39:36,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194862893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606914027] [2022-12-12 16:39:36,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:39:36,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:36,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:36,441 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:39:36,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 16:39:36,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 16:39:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:39:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:39:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:39:36,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:39:36,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606914027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:36,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:36,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-12 16:39:36,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991148564] [2022-12-12 16:39:36,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:36,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 16:39:36,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:36,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 16:39:36,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-12 16:39:36,705 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:36,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 2024 transitions, 59006 flow. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:36,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:36,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:36,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:42,818 INFO L130 PetriNetUnfolder]: 4283/8821 cut-off events. [2022-12-12 16:39:42,818 INFO L131 PetriNetUnfolder]: For 379949/379949 co-relation queries the response was YES. [2022-12-12 16:39:42,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109786 conditions, 8821 events. 4283/8821 cut-off events. For 379949/379949 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 77192 event pairs, 85 based on Foata normal form. 8/8828 useless extension candidates. Maximal degree in co-relation 108891. Up to 5374 conditions per place. [2022-12-12 16:39:42,956 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 1155 selfloop transitions, 904 changer transitions 1/2060 dead transitions. [2022-12-12 16:39:42,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 2060 transitions, 63606 flow [2022-12-12 16:39:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 16:39:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 16:39:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 76 transitions. [2022-12-12 16:39:42,957 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40641711229946526 [2022-12-12 16:39:42,957 INFO L175 Difference]: Start difference. First operand has 587 places, 2024 transitions, 59006 flow. Second operand 11 states and 76 transitions. [2022-12-12 16:39:42,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 2060 transitions, 63606 flow [2022-12-12 16:39:50,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2060 transitions, 62261 flow, removed 352 selfloop flow, removed 21 redundant places. [2022-12-12 16:39:50,900 INFO L231 Difference]: Finished difference. Result has 573 places, 2028 transitions, 59580 flow [2022-12-12 16:39:50,902 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=57674, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=900, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=59580, PETRI_PLACES=573, PETRI_TRANSITIONS=2028} [2022-12-12 16:39:50,903 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 552 predicate places. [2022-12-12 16:39:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 2028 transitions, 59580 flow [2022-12-12 16:39:50,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:50,904 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:50,904 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:50,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-12 16:39:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 16:39:51,109 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1673583861, now seen corresponding path program 22 times [2022-12-12 16:39:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:51,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806801730] [2022-12-12 16:39:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:39:51,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806801730] [2022-12-12 16:39:51,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806801730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861674338] [2022-12-12 16:39:51,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:39:51,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:51,258 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:39:51,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 16:39:51,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:39:51,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:39:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:39:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:39:51,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:39:51,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861674338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:51,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:51,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:39:51,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839091768] [2022-12-12 16:39:51,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:51,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:39:51,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:51,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:39:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:39:51,507 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:51,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 2028 transitions, 59580 flow. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:51,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:51,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:51,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:59,308 INFO L130 PetriNetUnfolder]: 4493/9236 cut-off events. [2022-12-12 16:39:59,308 INFO L131 PetriNetUnfolder]: For 399520/399520 co-relation queries the response was YES. [2022-12-12 16:39:59,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114448 conditions, 9236 events. 4493/9236 cut-off events. For 399520/399520 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 81297 event pairs, 58 based on Foata normal form. 52/9287 useless extension candidates. Maximal degree in co-relation 113463. Up to 3463 conditions per place. [2022-12-12 16:39:59,448 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1159 selfloop transitions, 1043 changer transitions 5/2207 dead transitions. [2022-12-12 16:39:59,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 2207 transitions, 67074 flow [2022-12-12 16:39:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 16:39:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 16:39:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 188 transitions. [2022-12-12 16:39:59,449 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30718954248366015 [2022-12-12 16:39:59,449 INFO L175 Difference]: Start difference. First operand has 573 places, 2028 transitions, 59580 flow. Second operand 36 states and 188 transitions. [2022-12-12 16:39:59,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 2207 transitions, 67074 flow [2022-12-12 16:40:07,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 2207 transitions, 66413 flow, removed 21 selfloop flow, removed 5 redundant places. [2022-12-12 16:40:07,245 INFO L231 Difference]: Finished difference. Result has 617 places, 2115 transitions, 63520 flow [2022-12-12 16:40:07,247 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=58838, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=965, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=63520, PETRI_PLACES=617, PETRI_TRANSITIONS=2115} [2022-12-12 16:40:07,247 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 596 predicate places. [2022-12-12 16:40:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 2115 transitions, 63520 flow [2022-12-12 16:40:07,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:07,247 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:07,247 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:07,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:07,448 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1534775953, now seen corresponding path program 23 times [2022-12-12 16:40:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102334568] [2022-12-12 16:40:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:07,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102334568] [2022-12-12 16:40:07,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102334568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54509341] [2022-12-12 16:40:07,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:40:07,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:07,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:07,562 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:07,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 16:40:07,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 16:40:07,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:07,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 16:40:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:07,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54509341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:07,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-12-12 16:40:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663167885] [2022-12-12 16:40:07,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:40:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:40:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:40:07,885 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:07,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 2115 transitions, 63520 flow. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:07,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:07,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:07,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:15,055 INFO L130 PetriNetUnfolder]: 4607/9423 cut-off events. [2022-12-12 16:40:15,055 INFO L131 PetriNetUnfolder]: For 445742/445742 co-relation queries the response was YES. [2022-12-12 16:40:15,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120353 conditions, 9423 events. 4607/9423 cut-off events. For 445742/445742 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 82792 event pairs, 94 based on Foata normal form. 16/9438 useless extension candidates. Maximal degree in co-relation 119398. Up to 4988 conditions per place. [2022-12-12 16:40:15,221 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 1634 selfloop transitions, 607 changer transitions 1/2242 dead transitions. [2022-12-12 16:40:15,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 2242 transitions, 70601 flow [2022-12-12 16:40:15,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 16:40:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 16:40:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 145 transitions. [2022-12-12 16:40:15,222 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28431372549019607 [2022-12-12 16:40:15,222 INFO L175 Difference]: Start difference. First operand has 617 places, 2115 transitions, 63520 flow. Second operand 30 states and 145 transitions. [2022-12-12 16:40:15,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 2242 transitions, 70601 flow [2022-12-12 16:40:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 2242 transitions, 68588 flow, removed 603 selfloop flow, removed 9 redundant places. [2022-12-12 16:40:23,961 INFO L231 Difference]: Finished difference. Result has 647 places, 2166 transitions, 64977 flow [2022-12-12 16:40:23,962 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=62014, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=64977, PETRI_PLACES=647, PETRI_TRANSITIONS=2166} [2022-12-12 16:40:23,963 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 626 predicate places. [2022-12-12 16:40:23,963 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 2166 transitions, 64977 flow [2022-12-12 16:40:23,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:23,963 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:23,963 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:23,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:24,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:24,168 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1124797521, now seen corresponding path program 24 times [2022-12-12 16:40:24,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:24,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526718198] [2022-12-12 16:40:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526718198] [2022-12-12 16:40:24,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526718198] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697929969] [2022-12-12 16:40:24,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:40:24,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:24,304 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:24,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 16:40:24,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 16:40:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:40:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:24,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:24,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697929969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:24,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:24,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:40:24,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806099277] [2022-12-12 16:40:24,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:24,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:40:24,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:40:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:40:24,584 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:24,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 2166 transitions, 64977 flow. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:24,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:24,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:31,676 INFO L130 PetriNetUnfolder]: 4617/9449 cut-off events. [2022-12-12 16:40:31,676 INFO L131 PetriNetUnfolder]: For 478323/478323 co-relation queries the response was YES. [2022-12-12 16:40:31,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120401 conditions, 9449 events. 4617/9449 cut-off events. For 478323/478323 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 83052 event pairs, 122 based on Foata normal form. 10/9456 useless extension candidates. Maximal degree in co-relation 119982. Up to 5888 conditions per place. [2022-12-12 16:40:31,836 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 1258 selfloop transitions, 948 changer transitions 1/2207 dead transitions. [2022-12-12 16:40:31,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 2207 transitions, 69818 flow [2022-12-12 16:40:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 16:40:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 16:40:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 92 transitions. [2022-12-12 16:40:31,837 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3607843137254902 [2022-12-12 16:40:31,837 INFO L175 Difference]: Start difference. First operand has 647 places, 2166 transitions, 64977 flow. Second operand 15 states and 92 transitions. [2022-12-12 16:40:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 2207 transitions, 69818 flow [2022-12-12 16:40:41,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 2207 transitions, 67994 flow, removed 166 selfloop flow, removed 16 redundant places. [2022-12-12 16:40:41,553 INFO L231 Difference]: Finished difference. Result has 647 places, 2169 transitions, 65184 flow [2022-12-12 16:40:41,555 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=63165, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=946, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=65184, PETRI_PLACES=647, PETRI_TRANSITIONS=2169} [2022-12-12 16:40:41,556 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 626 predicate places. [2022-12-12 16:40:41,556 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 2169 transitions, 65184 flow [2022-12-12 16:40:41,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:41,556 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:41,556 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:41,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:41,761 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -423659721, now seen corresponding path program 25 times [2022-12-12 16:40:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:41,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692389728] [2022-12-12 16:40:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:41,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692389728] [2022-12-12 16:40:41,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692389728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:41,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381520701] [2022-12-12 16:40:41,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:40:41,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:41,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:41,940 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:41,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 16:40:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:40:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:42,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:40:42,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381520701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:42,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:42,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:40:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901466617] [2022-12-12 16:40:42,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:42,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:40:42,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:42,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:40:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:40:42,197 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:42,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 2169 transitions, 65184 flow. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:42,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:42,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:42,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:50,728 INFO L130 PetriNetUnfolder]: 4910/10149 cut-off events. [2022-12-12 16:40:50,729 INFO L131 PetriNetUnfolder]: For 525639/525639 co-relation queries the response was YES. [2022-12-12 16:40:50,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129130 conditions, 10149 events. 4910/10149 cut-off events. For 525639/525639 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 90895 event pairs, 66 based on Foata normal form. 64/10212 useless extension candidates. Maximal degree in co-relation 128717. Up to 5142 conditions per place. [2022-12-12 16:40:50,900 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1583 selfloop transitions, 784 changer transitions 7/2374 dead transitions. [2022-12-12 16:40:50,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 2374 transitions, 74530 flow [2022-12-12 16:40:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 16:40:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 16:40:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 167 transitions. [2022-12-12 16:40:50,902 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35084033613445376 [2022-12-12 16:40:50,902 INFO L175 Difference]: Start difference. First operand has 647 places, 2169 transitions, 65184 flow. Second operand 28 states and 167 transitions. [2022-12-12 16:40:50,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 2374 transitions, 74530 flow [2022-12-12 16:41:01,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 2374 transitions, 73115 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-12-12 16:41:01,547 INFO L231 Difference]: Finished difference. Result has 671 places, 2263 transitions, 69351 flow [2022-12-12 16:41:01,549 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=63566, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=69351, PETRI_PLACES=671, PETRI_TRANSITIONS=2263} [2022-12-12 16:41:01,549 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 650 predicate places. [2022-12-12 16:41:01,549 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 2263 transitions, 69351 flow [2022-12-12 16:41:01,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:01,549 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:01,549 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:01,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-12 16:41:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:01,754 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash -258339935, now seen corresponding path program 26 times [2022-12-12 16:41:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:01,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524493912] [2022-12-12 16:41:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:41:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524493912] [2022-12-12 16:41:01,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524493912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393710117] [2022-12-12 16:41:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:41:01,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:01,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:01,868 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:01,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 16:41:01,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:41:01,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:41:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:41:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:41:02,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393710117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:02,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:02,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 16:41:02,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505882327] [2022-12-12 16:41:02,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:02,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 16:41:02,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 16:41:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-12 16:41:02,086 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:02,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 2263 transitions, 69351 flow. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:02,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:02,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:02,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:10,386 INFO L130 PetriNetUnfolder]: 4949/10185 cut-off events. [2022-12-12 16:41:10,387 INFO L131 PetriNetUnfolder]: For 551777/551777 co-relation queries the response was YES. [2022-12-12 16:41:10,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133293 conditions, 10185 events. 4949/10185 cut-off events. For 551777/551777 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 90853 event pairs, 145 based on Foata normal form. 10/10194 useless extension candidates. Maximal degree in co-relation 133058. Up to 8288 conditions per place. [2022-12-12 16:41:10,568 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 1798 selfloop transitions, 537 changer transitions 1/2336 dead transitions. [2022-12-12 16:41:10,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 2336 transitions, 75028 flow [2022-12-12 16:41:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 16:41:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 16:41:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 110 transitions. [2022-12-12 16:41:10,569 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34055727554179566 [2022-12-12 16:41:10,570 INFO L175 Difference]: Start difference. First operand has 671 places, 2263 transitions, 69351 flow. Second operand 19 states and 110 transitions. [2022-12-12 16:41:10,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 2336 transitions, 75028 flow [2022-12-12 16:41:21,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 2336 transitions, 72921 flow, removed 685 selfloop flow, removed 24 redundant places. [2022-12-12 16:41:21,820 INFO L231 Difference]: Finished difference. Result has 669 places, 2278 transitions, 69283 flow [2022-12-12 16:41:21,821 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=67192, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=69283, PETRI_PLACES=669, PETRI_TRANSITIONS=2278} [2022-12-12 16:41:21,822 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 648 predicate places. [2022-12-12 16:41:21,822 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 2278 transitions, 69283 flow [2022-12-12 16:41:21,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:21,822 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:21,822 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:21,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 16:41:22,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-12 16:41:22,023 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 884284335, now seen corresponding path program 27 times [2022-12-12 16:41:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:22,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984605566] [2022-12-12 16:41:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:41:22,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:22,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984605566] [2022-12-12 16:41:22,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984605566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048874912] [2022-12-12 16:41:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:41:22,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:22,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:22,134 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:22,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 16:41:22,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 16:41:22,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:41:22,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:41:22,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:41:22,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048874912] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:22,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:22,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:41:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653839969] [2022-12-12 16:41:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:41:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:41:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:41:22,410 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:22,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 2278 transitions, 69283 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:22,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:22,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:22,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:31,000 INFO L130 PetriNetUnfolder]: 5025/10351 cut-off events. [2022-12-12 16:41:31,000 INFO L131 PetriNetUnfolder]: For 511689/511689 co-relation queries the response was YES. [2022-12-12 16:41:31,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131891 conditions, 10351 events. 5025/10351 cut-off events. For 511689/511689 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 92859 event pairs, 1461 based on Foata normal form. 16/10366 useless extension candidates. Maximal degree in co-relation 131137. Up to 6293 conditions per place. [2022-12-12 16:41:31,234 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 2007 selfloop transitions, 350 changer transitions 23/2380 dead transitions. [2022-12-12 16:41:31,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 2380 transitions, 75972 flow [2022-12-12 16:41:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 16:41:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 16:41:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 107 transitions. [2022-12-12 16:41:31,235 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28609625668449196 [2022-12-12 16:41:31,235 INFO L175 Difference]: Start difference. First operand has 669 places, 2278 transitions, 69283 flow. Second operand 22 states and 107 transitions. [2022-12-12 16:41:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 2380 transitions, 75972 flow [2022-12-12 16:41:40,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 2380 transitions, 75057 flow, removed 30 selfloop flow, removed 13 redundant places. [2022-12-12 16:41:40,438 INFO L231 Difference]: Finished difference. Result has 685 places, 2296 transitions, 70248 flow [2022-12-12 16:41:40,440 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=68213, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1928, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=70248, PETRI_PLACES=685, PETRI_TRANSITIONS=2296} [2022-12-12 16:41:40,440 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 664 predicate places. [2022-12-12 16:41:40,440 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 2296 transitions, 70248 flow [2022-12-12 16:41:40,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:40,440 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:40,440 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:40,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-12 16:41:40,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:40,646 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash 134044463, now seen corresponding path program 28 times [2022-12-12 16:41:40,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:40,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717433771] [2022-12-12 16:41:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:40,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:41:40,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717433771] [2022-12-12 16:41:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717433771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659315664] [2022-12-12 16:41:40,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:41:40,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:40,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:40,765 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:40,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 16:41:40,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:41:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:41:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:41:40,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:41:40,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659315664] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:40,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 16:41:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712628672] [2022-12-12 16:41:40,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 16:41:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 16:41:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-12 16:41:40,999 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:40,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 2296 transitions, 70248 flow. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:40,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:40,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:40,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:49,229 INFO L130 PetriNetUnfolder]: 5093/10436 cut-off events. [2022-12-12 16:41:49,229 INFO L131 PetriNetUnfolder]: For 546770/546770 co-relation queries the response was YES. [2022-12-12 16:41:49,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134889 conditions, 10436 events. 5093/10436 cut-off events. For 546770/546770 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 93345 event pairs, 1943 based on Foata normal form. 44/10479 useless extension candidates. Maximal degree in co-relation 134102. Up to 9646 conditions per place. [2022-12-12 16:41:49,420 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 2136 selfloop transitions, 259 changer transitions 0/2395 dead transitions. [2022-12-12 16:41:49,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 2395 transitions, 76699 flow [2022-12-12 16:41:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 16:41:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 16:41:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 123 transitions. [2022-12-12 16:41:49,422 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3145780051150895 [2022-12-12 16:41:49,422 INFO L175 Difference]: Start difference. First operand has 685 places, 2296 transitions, 70248 flow. Second operand 23 states and 123 transitions. [2022-12-12 16:41:49,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 2395 transitions, 76699 flow [2022-12-12 16:41:59,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2395 transitions, 76458 flow, removed 65 selfloop flow, removed 7 redundant places. [2022-12-12 16:42:00,016 INFO L231 Difference]: Finished difference. Result has 702 places, 2324 transitions, 71694 flow [2022-12-12 16:42:00,017 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=69791, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=71694, PETRI_PLACES=702, PETRI_TRANSITIONS=2324} [2022-12-12 16:42:00,018 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 681 predicate places. [2022-12-12 16:42:00,018 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 2324 transitions, 71694 flow [2022-12-12 16:42:00,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:00,018 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:00,018 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:00,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:00,223 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:42:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2069492769, now seen corresponding path program 29 times [2022-12-12 16:42:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:00,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833486038] [2022-12-12 16:42:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:00,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833486038] [2022-12-12 16:42:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833486038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370140709] [2022-12-12 16:42:00,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:42:00,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:00,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:00,372 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:00,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-12 16:42:00,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 16:42:00,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:00,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:42:00,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:00,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:00,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370140709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:00,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:00,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:42:00,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770740427] [2022-12-12 16:42:00,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:00,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:42:00,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:42:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:42:00,626 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:00,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 2324 transitions, 71694 flow. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:00,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:00,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:00,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:09,887 INFO L130 PetriNetUnfolder]: 5114/10489 cut-off events. [2022-12-12 16:42:09,887 INFO L131 PetriNetUnfolder]: For 570765/570765 co-relation queries the response was YES. [2022-12-12 16:42:10,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136803 conditions, 10489 events. 5114/10489 cut-off events. For 570765/570765 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 94154 event pairs, 1468 based on Foata normal form. 20/10508 useless extension candidates. Maximal degree in co-relation 135991. Up to 7041 conditions per place. [2022-12-12 16:42:10,073 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1964 selfloop transitions, 448 changer transitions 0/2412 dead transitions. [2022-12-12 16:42:10,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 2412 transitions, 78144 flow [2022-12-12 16:42:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 16:42:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 16:42:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 133 transitions. [2022-12-12 16:42:10,075 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32598039215686275 [2022-12-12 16:42:10,075 INFO L175 Difference]: Start difference. First operand has 702 places, 2324 transitions, 71694 flow. Second operand 24 states and 133 transitions. [2022-12-12 16:42:10,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 2412 transitions, 78144 flow [2022-12-12 16:42:20,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 2412 transitions, 77696 flow, removed 136 selfloop flow, removed 10 redundant places. [2022-12-12 16:42:20,061 INFO L231 Difference]: Finished difference. Result has 720 places, 2341 transitions, 73196 flow [2022-12-12 16:42:20,063 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=71137, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73196, PETRI_PLACES=720, PETRI_TRANSITIONS=2341} [2022-12-12 16:42:20,064 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 699 predicate places. [2022-12-12 16:42:20,064 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 2341 transitions, 73196 flow [2022-12-12 16:42:20,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:20,064 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:20,064 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:20,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:20,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-12 16:42:20,269 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:42:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash -404115409, now seen corresponding path program 30 times [2022-12-12 16:42:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:20,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125532031] [2022-12-12 16:42:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:20,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:20,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125532031] [2022-12-12 16:42:20,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125532031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989021237] [2022-12-12 16:42:20,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:42:20,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:20,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:20,391 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:20,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-12 16:42:20,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 16:42:20,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:42:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:20,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:20,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989021237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:20,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:20,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 16:42:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707545882] [2022-12-12 16:42:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 16:42:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 16:42:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-12 16:42:20,655 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:20,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 2341 transitions, 73196 flow. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:20,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:20,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:20,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:29,884 INFO L130 PetriNetUnfolder]: 5252/10749 cut-off events. [2022-12-12 16:42:29,885 INFO L131 PetriNetUnfolder]: For 603090/603090 co-relation queries the response was YES. [2022-12-12 16:42:30,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141871 conditions, 10749 events. 5252/10749 cut-off events. For 603090/603090 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 96587 event pairs, 2050 based on Foata normal form. 46/10794 useless extension candidates. Maximal degree in co-relation 141037. Up to 10156 conditions per place. [2022-12-12 16:42:30,079 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 2287 selfloop transitions, 191 changer transitions 0/2478 dead transitions. [2022-12-12 16:42:30,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 2478 transitions, 81019 flow [2022-12-12 16:42:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 16:42:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 16:42:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 161 transitions. [2022-12-12 16:42:30,080 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3265720081135903 [2022-12-12 16:42:30,081 INFO L175 Difference]: Start difference. First operand has 720 places, 2341 transitions, 73196 flow. Second operand 29 states and 161 transitions. [2022-12-12 16:42:30,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 2478 transitions, 81019 flow [2022-12-12 16:42:41,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 2478 transitions, 79894 flow, removed 290 selfloop flow, removed 15 redundant places. [2022-12-12 16:42:41,536 INFO L231 Difference]: Finished difference. Result has 748 places, 2390 transitions, 74384 flow [2022-12-12 16:42:41,538 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=72023, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=74384, PETRI_PLACES=748, PETRI_TRANSITIONS=2390} [2022-12-12 16:42:41,538 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 727 predicate places. [2022-12-12 16:42:41,538 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 2390 transitions, 74384 flow [2022-12-12 16:42:41,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:41,538 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:41,539 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:41,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:41,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-12 16:42:41,744 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:42:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:41,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2076998117, now seen corresponding path program 31 times [2022-12-12 16:42:41,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:41,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421822873] [2022-12-12 16:42:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421822873] [2022-12-12 16:42:41,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421822873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325536454] [2022-12-12 16:42:41,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:42:41,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:41,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:41,875 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:41,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-12 16:42:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:41,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:42:41,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:42,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:42:42,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325536454] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:42,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:42,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:42:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433083402] [2022-12-12 16:42:42,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:42,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:42:42,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:42:42,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:42:42,117 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:42,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 2390 transitions, 74384 flow. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:42,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:42,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:42,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:51,346 INFO L130 PetriNetUnfolder]: 5295/10860 cut-off events. [2022-12-12 16:42:51,346 INFO L131 PetriNetUnfolder]: For 613124/613124 co-relation queries the response was YES. [2022-12-12 16:42:51,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143058 conditions, 10860 events. 5295/10860 cut-off events. For 613124/613124 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 97921 event pairs, 1623 based on Foata normal form. 32/10891 useless extension candidates. Maximal degree in co-relation 142668. Up to 7680 conditions per place. [2022-12-12 16:42:51,549 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 2128 selfloop transitions, 350 changer transitions 0/2478 dead transitions. [2022-12-12 16:42:51,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 2478 transitions, 81201 flow [2022-12-12 16:42:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 16:42:51,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 16:42:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 125 transitions. [2022-12-12 16:42:51,550 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.319693094629156 [2022-12-12 16:42:51,551 INFO L175 Difference]: Start difference. First operand has 748 places, 2390 transitions, 74384 flow. Second operand 23 states and 125 transitions. [2022-12-12 16:42:51,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 2478 transitions, 81201 flow [2022-12-12 16:43:03,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 2478 transitions, 80561 flow, removed 254 selfloop flow, removed 7 redundant places. [2022-12-12 16:43:03,372 INFO L231 Difference]: Finished difference. Result has 767 places, 2411 transitions, 75629 flow [2022-12-12 16:43:03,374 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=73613, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=75629, PETRI_PLACES=767, PETRI_TRANSITIONS=2411} [2022-12-12 16:43:03,374 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 746 predicate places. [2022-12-12 16:43:03,374 INFO L495 AbstractCegarLoop]: Abstraction has has 767 places, 2411 transitions, 75629 flow [2022-12-12 16:43:03,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:03,374 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:03,374 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:03,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:03,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-12 16:43:03,579 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:43:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1499352805, now seen corresponding path program 32 times [2022-12-12 16:43:03,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:03,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855150223] [2022-12-12 16:43:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:03,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:03,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:03,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855150223] [2022-12-12 16:43:03,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855150223] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:03,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177156784] [2022-12-12 16:43:03,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:43:03,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:03,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:03,736 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:03,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-12 16:43:03,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:43:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:43:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:43:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:03,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:04,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177156784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:43:04,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:43:04,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 16:43:04,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753825366] [2022-12-12 16:43:04,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:43:04,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:43:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:43:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:43:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:43:04,023 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:43:04,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 2411 transitions, 75629 flow. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:04,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:43:04,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:43:04,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:43:13,746 INFO L130 PetriNetUnfolder]: 5391/11026 cut-off events. [2022-12-12 16:43:13,746 INFO L131 PetriNetUnfolder]: For 639879/639879 co-relation queries the response was YES. [2022-12-12 16:43:13,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146531 conditions, 11026 events. 5391/11026 cut-off events. For 639879/639879 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 99547 event pairs, 1514 based on Foata normal form. 20/11045 useless extension candidates. Maximal degree in co-relation 145817. Up to 7257 conditions per place. [2022-12-12 16:43:13,955 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1986 selfloop transitions, 562 changer transitions 1/2549 dead transitions. [2022-12-12 16:43:13,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 2549 transitions, 84085 flow [2022-12-12 16:43:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 16:43:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 16:43:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 165 transitions. [2022-12-12 16:43:13,956 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33468559837728196 [2022-12-12 16:43:13,956 INFO L175 Difference]: Start difference. First operand has 767 places, 2411 transitions, 75629 flow. Second operand 29 states and 165 transitions. [2022-12-12 16:43:13,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 2549 transitions, 84085 flow [2022-12-12 16:43:25,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 2549 transitions, 82771 flow, removed 468 selfloop flow, removed 11 redundant places. [2022-12-12 16:43:25,764 INFO L231 Difference]: Finished difference. Result has 788 places, 2465 transitions, 78203 flow [2022-12-12 16:43:25,765 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=74457, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=78203, PETRI_PLACES=788, PETRI_TRANSITIONS=2465} [2022-12-12 16:43:25,766 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 767 predicate places. [2022-12-12 16:43:25,766 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 2465 transitions, 78203 flow [2022-12-12 16:43:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:25,766 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:25,766 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:25,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:25,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-12 16:43:25,971 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:43:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1952050293, now seen corresponding path program 33 times [2022-12-12 16:43:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:25,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495545784] [2022-12-12 16:43:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:25,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495545784] [2022-12-12 16:43:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495545784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878263068] [2022-12-12 16:43:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:43:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:26,088 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:26,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-12 16:43:26,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 16:43:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:43:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:43:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:43:26,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:43:26,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878263068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:43:26,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:43:26,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:43:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677296798] [2022-12-12 16:43:26,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:43:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:43:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:43:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:43:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:43:26,451 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:43:26,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 2465 transitions, 78203 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:26,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:43:26,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:43:26,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:43:36,615 INFO L130 PetriNetUnfolder]: 5728/11759 cut-off events. [2022-12-12 16:43:36,615 INFO L131 PetriNetUnfolder]: For 671904/671904 co-relation queries the response was YES. [2022-12-12 16:43:36,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156153 conditions, 11759 events. 5728/11759 cut-off events. For 671904/671904 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 107421 event pairs, 1906 based on Foata normal form. 44/11802 useless extension candidates. Maximal degree in co-relation 155620. Up to 9361 conditions per place. [2022-12-12 16:43:36,871 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 2218 selfloop transitions, 414 changer transitions 7/2639 dead transitions. [2022-12-12 16:43:36,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 2639 transitions, 88220 flow [2022-12-12 16:43:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:43:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:43:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 95 transitions. [2022-12-12 16:43:36,872 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3492647058823529 [2022-12-12 16:43:36,873 INFO L175 Difference]: Start difference. First operand has 788 places, 2465 transitions, 78203 flow. Second operand 16 states and 95 transitions. [2022-12-12 16:43:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 2639 transitions, 88220 flow [2022-12-12 16:43:49,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 2639 transitions, 86903 flow, removed 582 selfloop flow, removed 11 redundant places. [2022-12-12 16:43:49,857 INFO L231 Difference]: Finished difference. Result has 794 places, 2542 transitions, 80804 flow [2022-12-12 16:43:49,859 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=76770, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2063, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=80804, PETRI_PLACES=794, PETRI_TRANSITIONS=2542} [2022-12-12 16:43:49,859 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 773 predicate places. [2022-12-12 16:43:49,859 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 2542 transitions, 80804 flow [2022-12-12 16:43:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:49,860 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:49,860 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:49,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:50,060 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:43:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash -613869669, now seen corresponding path program 34 times [2022-12-12 16:43:50,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:50,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669911938] [2022-12-12 16:43:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:50,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:50,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669911938] [2022-12-12 16:43:50,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669911938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389025911] [2022-12-12 16:43:50,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:43:50,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:50,165 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:50,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-12 16:43:50,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:43:50,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:43:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:43:50,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:43:50,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:43:50,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389025911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:43:50,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:43:50,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:43:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123814034] [2022-12-12 16:43:50,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:43:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:43:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:43:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:43:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:43:50,463 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:43:50,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 2542 transitions, 80804 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:50,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:43:50,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:43:50,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:44:01,342 INFO L130 PetriNetUnfolder]: 5682/11637 cut-off events. [2022-12-12 16:44:01,342 INFO L131 PetriNetUnfolder]: For 652700/652700 co-relation queries the response was YES. [2022-12-12 16:44:01,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155074 conditions, 11637 events. 5682/11637 cut-off events. For 652700/652700 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 105943 event pairs, 1505 based on Foata normal form. 30/11666 useless extension candidates. Maximal degree in co-relation 154624. Up to 6567 conditions per place. [2022-12-12 16:44:01,574 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 2026 selfloop transitions, 606 changer transitions 13/2645 dead transitions. [2022-12-12 16:44:01,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 2645 transitions, 88618 flow [2022-12-12 16:44:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 16:44:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 16:44:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 108 transitions. [2022-12-12 16:44:01,575 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2887700534759358 [2022-12-12 16:44:01,575 INFO L175 Difference]: Start difference. First operand has 794 places, 2542 transitions, 80804 flow. Second operand 22 states and 108 transitions. [2022-12-12 16:44:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 2645 transitions, 88618 flow [2022-12-12 16:44:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2645 transitions, 88015 flow, removed 141 selfloop flow, removed 18 redundant places. [2022-12-12 16:44:14,166 INFO L231 Difference]: Finished difference. Result has 799 places, 2559 transitions, 82604 flow [2022-12-12 16:44:14,168 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=79672, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1949, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=82604, PETRI_PLACES=799, PETRI_TRANSITIONS=2559} [2022-12-12 16:44:14,168 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 778 predicate places. [2022-12-12 16:44:14,168 INFO L495 AbstractCegarLoop]: Abstraction has has 799 places, 2559 transitions, 82604 flow [2022-12-12 16:44:14,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:44:14,168 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:44:14,168 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:44:14,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-12 16:44:14,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-12 16:44:14,373 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:44:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:44:14,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1446990133, now seen corresponding path program 35 times [2022-12-12 16:44:14,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:44:14,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877758668] [2022-12-12 16:44:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:44:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:44:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:44:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:44:14,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:44:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877758668] [2022-12-12 16:44:14,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877758668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:44:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235808301] [2022-12-12 16:44:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:44:14,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:44:14,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:44:14,489 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:44:14,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-12 16:44:14,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 16:44:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:44:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:44:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:44:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:44:14,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:44:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:44:14,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235808301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:44:14,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:44:14,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 16:44:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954152886] [2022-12-12 16:44:14,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:44:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:44:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:44:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:44:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:44:14,755 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:44:14,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 2559 transitions, 82604 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:44:14,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:44:14,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:44:14,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:44:25,343 INFO L130 PetriNetUnfolder]: 5707/11662 cut-off events. [2022-12-12 16:44:25,343 INFO L131 PetriNetUnfolder]: For 690554/690554 co-relation queries the response was YES. [2022-12-12 16:44:25,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158854 conditions, 11662 events. 5707/11662 cut-off events. For 690554/690554 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 105963 event pairs, 1668 based on Foata normal form. 8/11669 useless extension candidates. Maximal degree in co-relation 158408. Up to 7000 conditions per place. [2022-12-12 16:44:25,704 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 2221 selfloop transitions, 392 changer transitions 8/2621 dead transitions. [2022-12-12 16:44:25,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 2621 transitions, 89513 flow [2022-12-12 16:44:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 16:44:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 16:44:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 90 transitions. [2022-12-12 16:44:25,705 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2647058823529412 [2022-12-12 16:44:25,705 INFO L175 Difference]: Start difference. First operand has 799 places, 2559 transitions, 82604 flow. Second operand 20 states and 90 transitions. [2022-12-12 16:44:25,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 2621 transitions, 89513 flow [2022-12-12 16:44:38,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 2621 transitions, 87839 flow, removed 702 selfloop flow, removed 13 redundant places. [2022-12-12 16:44:38,927 INFO L231 Difference]: Finished difference. Result has 809 places, 2563 transitions, 82904 flow [2022-12-12 16:44:38,929 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=81070, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=82904, PETRI_PLACES=809, PETRI_TRANSITIONS=2563} [2022-12-12 16:44:38,929 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2022-12-12 16:44:38,929 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 2563 transitions, 82904 flow [2022-12-12 16:44:38,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:44:38,929 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:44:38,929 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:44:38,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-12 16:44:39,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-12 16:44:39,131 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:44:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:44:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash -615813547, now seen corresponding path program 36 times [2022-12-12 16:44:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:44:39,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236327615] [2022-12-12 16:44:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:44:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:44:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:44:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:44:40,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:44:40,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236327615] [2022-12-12 16:44:40,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236327615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:44:40,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872347078] [2022-12-12 16:44:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:44:40,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:44:40,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:44:40,012 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:44:40,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-12 16:44:40,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 16:44:40,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:44:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-12 16:44:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:44:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:44:40,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 16:44:40,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:40,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-12 16:44:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:44:40,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:44:40,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:40,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2022-12-12 16:44:40,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:40,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 52 [2022-12-12 16:44:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 16:44:40,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872347078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:44:40,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:44:40,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 22 [2022-12-12 16:44:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818515107] [2022-12-12 16:44:40,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:44:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 16:44:40,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:44:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 16:44:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=461, Unknown=3, NotChecked=0, Total=552 [2022-12-12 16:44:40,647 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:44:40,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 2563 transitions, 82904 flow. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:44:40,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:44:40,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:44:40,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:44:50,678 INFO L130 PetriNetUnfolder]: 5721/11673 cut-off events. [2022-12-12 16:44:50,678 INFO L131 PetriNetUnfolder]: For 677521/677552 co-relation queries the response was YES. [2022-12-12 16:44:50,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158643 conditions, 11673 events. 5721/11673 cut-off events. For 677521/677552 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 106021 event pairs, 232 based on Foata normal form. 17/11660 useless extension candidates. Maximal degree in co-relation 158228. Up to 11065 conditions per place. [2022-12-12 16:44:50,908 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 2425 selfloop transitions, 177 changer transitions 17/2638 dead transitions. [2022-12-12 16:44:50,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 2638 transitions, 89639 flow [2022-12-12 16:44:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:44:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:44:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 115 transitions. [2022-12-12 16:44:50,909 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39792387543252594 [2022-12-12 16:44:50,909 INFO L175 Difference]: Start difference. First operand has 809 places, 2563 transitions, 82904 flow. Second operand 17 states and 115 transitions. [2022-12-12 16:44:50,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 2638 transitions, 89639 flow [2022-12-12 16:45:03,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 808 places, 2638 transitions, 89061 flow, removed 101 selfloop flow, removed 14 redundant places. [2022-12-12 16:45:03,297 INFO L231 Difference]: Finished difference. Result has 812 places, 2588 transitions, 83634 flow [2022-12-12 16:45:03,298 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=82364, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=83634, PETRI_PLACES=812, PETRI_TRANSITIONS=2588} [2022-12-12 16:45:03,299 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2022-12-12 16:45:03,299 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2588 transitions, 83634 flow [2022-12-12 16:45:03,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:45:03,299 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:45:03,299 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:45:03,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-12 16:45:03,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-12 16:45:03,504 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:45:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:45:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -373668568, now seen corresponding path program 37 times [2022-12-12 16:45:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:45:03,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416272923] [2022-12-12 16:45:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:45:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:45:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:45:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:45:05,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:45:05,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416272923] [2022-12-12 16:45:05,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416272923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:45:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491321951] [2022-12-12 16:45:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:45:05,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:45:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:45:05,095 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:45:05,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-12 16:45:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:45:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 16:45:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:45:05,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:45:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2022-12-12 16:45:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:45:05,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:45:05,860 INFO L321 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-12-12 16:45:05,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 308 [2022-12-12 16:45:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:45:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491321951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:45:06,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:45:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2022-12-12 16:45:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998726891] [2022-12-12 16:45:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:45:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 16:45:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:45:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 16:45:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-12-12 16:45:06,750 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:45:06,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2588 transitions, 83634 flow. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:45:06,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:45:06,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:45:06,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:45:22,981 INFO L130 PetriNetUnfolder]: 9040/18387 cut-off events. [2022-12-12 16:45:22,982 INFO L131 PetriNetUnfolder]: For 1209589/1209654 co-relation queries the response was YES. [2022-12-12 16:45:23,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254758 conditions, 18387 events. 9040/18387 cut-off events. For 1209589/1209654 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 176452 event pairs, 557 based on Foata normal form. 53/18416 useless extension candidates. Maximal degree in co-relation 254049. Up to 11710 conditions per place. [2022-12-12 16:45:23,339 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 2942 selfloop transitions, 848 changer transitions 115/3924 dead transitions. [2022-12-12 16:45:23,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 3924 transitions, 136688 flow [2022-12-12 16:45:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 16:45:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 16:45:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 274 transitions. [2022-12-12 16:45:23,340 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5199240986717267 [2022-12-12 16:45:23,340 INFO L175 Difference]: Start difference. First operand has 812 places, 2588 transitions, 83634 flow. Second operand 31 states and 274 transitions. [2022-12-12 16:45:23,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 3924 transitions, 136688 flow [2022-12-12 16:45:47,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 3924 transitions, 135579 flow, removed 58 selfloop flow, removed 10 redundant places. [2022-12-12 16:45:47,171 INFO L231 Difference]: Finished difference. Result has 843 places, 3351 transitions, 113606 flow [2022-12-12 16:45:47,172 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=82870, PETRI_DIFFERENCE_MINUEND_PLACES=795, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=113606, PETRI_PLACES=843, PETRI_TRANSITIONS=3351} [2022-12-12 16:45:47,173 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 822 predicate places. [2022-12-12 16:45:47,173 INFO L495 AbstractCegarLoop]: Abstraction has has 843 places, 3351 transitions, 113606 flow [2022-12-12 16:45:47,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:45:47,173 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:45:47,173 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:45:47,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-12 16:45:47,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:45:47,375 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:45:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:45:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1925154968, now seen corresponding path program 38 times [2022-12-12 16:45:47,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:45:47,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551840740] [2022-12-12 16:45:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:45:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:45:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:45:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:45:49,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:45:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551840740] [2022-12-12 16:45:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551840740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:45:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949831910] [2022-12-12 16:45:49,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:45:49,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:45:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:45:49,212 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:45:49,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-12 16:45:49,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:45:49,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:45:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 16:45:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:45:49,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:45:49,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2022-12-12 16:45:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:45:49,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:45:49,959 INFO L321 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-12-12 16:45:49,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 308 [2022-12-12 16:45:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:45:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949831910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:45:50,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:45:50,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2022-12-12 16:45:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091725116] [2022-12-12 16:45:50,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:45:50,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 16:45:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:45:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 16:45:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-12-12 16:45:50,690 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:45:50,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 3351 transitions, 113606 flow. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:45:50,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:45:50,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:45:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:46:13,528 INFO L130 PetriNetUnfolder]: 10022/20725 cut-off events. [2022-12-12 16:46:13,529 INFO L131 PetriNetUnfolder]: For 1435941/1435976 co-relation queries the response was YES. [2022-12-12 16:46:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294158 conditions, 20725 events. 10022/20725 cut-off events. For 1435941/1435976 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 204456 event pairs, 830 based on Foata normal form. 25/20727 useless extension candidates. Maximal degree in co-relation 293423. Up to 17429 conditions per place. [2022-12-12 16:46:14,050 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 3278 selfloop transitions, 616 changer transitions 16/3929 dead transitions. [2022-12-12 16:46:14,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 3929 transitions, 140676 flow [2022-12-12 16:46:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 16:46:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 16:46:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 174 transitions. [2022-12-12 16:46:14,051 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2022-12-12 16:46:14,051 INFO L175 Difference]: Start difference. First operand has 843 places, 3351 transitions, 113606 flow. Second operand 24 states and 174 transitions. [2022-12-12 16:46:14,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 3929 transitions, 140676 flow [2022-12-12 16:46:46,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 858 places, 3929 transitions, 135964 flow, removed 2287 selfloop flow, removed 8 redundant places. [2022-12-12 16:46:46,110 INFO L231 Difference]: Finished difference. Result has 864 places, 3706 transitions, 124354 flow [2022-12-12 16:46:46,112 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=109378, PETRI_DIFFERENCE_MINUEND_PLACES=835, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=124354, PETRI_PLACES=864, PETRI_TRANSITIONS=3706} [2022-12-12 16:46:46,113 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 843 predicate places. [2022-12-12 16:46:46,113 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 3706 transitions, 124354 flow [2022-12-12 16:46:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:46:46,113 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:46:46,113 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:46:46,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-12 16:46:46,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:46:46,318 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:46:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:46:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1995916420, now seen corresponding path program 39 times [2022-12-12 16:46:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:46:46,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852235929] [2022-12-12 16:46:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:46:46,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:46:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:46:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:46:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:46:47,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852235929] [2022-12-12 16:46:47,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852235929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:46:47,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496076972] [2022-12-12 16:46:47,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:46:47,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:46:47,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:46:47,893 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:46:47,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-12 16:46:48,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 16:46:48,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:46:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 16:46:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:46:48,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:46:48,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 76 [2022-12-12 16:46:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:46:48,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:46:48,867 INFO L321 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-12-12 16:46:48,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 146 treesize of output 322 [2022-12-12 16:46:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:46:50,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496076972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:46:50,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:46:50,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2022-12-12 16:46:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034850325] [2022-12-12 16:46:50,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:46:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 16:46:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:46:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 16:46:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-12-12 16:46:50,021 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:46:50,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 3706 transitions, 124354 flow. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:46:50,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:46:50,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:46:50,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:47:25,967 INFO L130 PetriNetUnfolder]: 13994/29176 cut-off events. [2022-12-12 16:47:25,967 INFO L131 PetriNetUnfolder]: For 2197902/2197928 co-relation queries the response was YES. [2022-12-12 16:47:26,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416833 conditions, 29176 events. 13994/29176 cut-off events. For 2197902/2197928 co-relation queries the response was YES. Maximal size of possible extension queue 1752. Compared 304741 event pairs, 1154 based on Foata normal form. 63/29208 useless extension candidates. Maximal degree in co-relation 416084. Up to 18884 conditions per place. [2022-12-12 16:47:26,757 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 3624 selfloop transitions, 1380 changer transitions 154/5177 dead transitions. [2022-12-12 16:47:26,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 884 places, 5177 transitions, 187425 flow [2022-12-12 16:47:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 16:47:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 16:47:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 198 transitions. [2022-12-12 16:47:26,759 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5546218487394958 [2022-12-12 16:47:26,759 INFO L175 Difference]: Start difference. First operand has 864 places, 3706 transitions, 124354 flow. Second operand 21 states and 198 transitions. [2022-12-12 16:47:26,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 884 places, 5177 transitions, 187425 flow [2022-12-12 16:48:20,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 5177 transitions, 185952 flow, removed 670 selfloop flow, removed 9 redundant places. [2022-12-12 16:48:20,495 INFO L231 Difference]: Finished difference. Result has 887 places, 4620 transitions, 163604 flow [2022-12-12 16:48:20,497 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=123045, PETRI_DIFFERENCE_MINUEND_PLACES=855, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=163604, PETRI_PLACES=887, PETRI_TRANSITIONS=4620} [2022-12-12 16:48:20,498 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 866 predicate places. [2022-12-12 16:48:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 887 places, 4620 transitions, 163604 flow [2022-12-12 16:48:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:48:20,498 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:48:20,498 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:48:20,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-12 16:48:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-12 16:48:20,703 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:48:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:48:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash -360223016, now seen corresponding path program 40 times [2022-12-12 16:48:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:48:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268518864] [2022-12-12 16:48:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:48:20,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:48:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:48:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:48:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:48:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268518864] [2022-12-12 16:48:22,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268518864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:48:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325170451] [2022-12-12 16:48:22,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:48:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:48:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:48:22,071 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:48:22,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-12 16:48:22,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:48:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:48:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 16:48:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:48:22,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:48:22,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2022-12-12 16:48:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:48:22,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:48:22,881 INFO L321 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-12-12 16:48:22,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 308 [2022-12-12 16:48:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:48:23,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325170451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:48:23,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:48:23,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2022-12-12 16:48:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241107948] [2022-12-12 16:48:23,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:48:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 16:48:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:48:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 16:48:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-12-12 16:48:23,722 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:48:23,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 4620 transitions, 163604 flow. Second operand has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:48:23,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:48:23,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:48:23,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:49:19,707 INFO L130 PetriNetUnfolder]: 17391/36901 cut-off events. [2022-12-12 16:49:19,708 INFO L131 PetriNetUnfolder]: For 2996004/2996030 co-relation queries the response was YES. [2022-12-12 16:49:21,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539159 conditions, 36901 events. 17391/36901 cut-off events. For 2996004/2996030 co-relation queries the response was YES. Maximal size of possible extension queue 2135. Compared 402918 event pairs, 1521 based on Foata normal form. 93/36961 useless extension candidates. Maximal degree in co-relation 537277. Up to 23699 conditions per place. [2022-12-12 16:49:21,432 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 4146 selfloop transitions, 1896 changer transitions 89/6150 dead transitions. [2022-12-12 16:49:21,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 6150 transitions, 228972 flow [2022-12-12 16:49:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 16:49:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 16:49:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 256 transitions. [2022-12-12 16:49:21,433 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4857685009487666 [2022-12-12 16:49:21,433 INFO L175 Difference]: Start difference. First operand has 887 places, 4620 transitions, 163604 flow. Second operand 31 states and 256 transitions. [2022-12-12 16:49:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 6150 transitions, 228972 flow [2022-12-12 16:50:43,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 6150 transitions, 224790 flow, removed 2011 selfloop flow, removed 8 redundant places. [2022-12-12 16:50:43,459 INFO L231 Difference]: Finished difference. Result has 921 places, 5609 transitions, 204180 flow [2022-12-12 16:50:43,462 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=160528, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=972, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=204180, PETRI_PLACES=921, PETRI_TRANSITIONS=5609} [2022-12-12 16:50:43,462 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 900 predicate places. [2022-12-12 16:50:43,462 INFO L495 AbstractCegarLoop]: Abstraction has has 921 places, 5609 transitions, 204180 flow [2022-12-12 16:50:43,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:50:43,462 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:50:43,462 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:50:43,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-12 16:50:43,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-12 16:50:43,667 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:50:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:50:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash 638332952, now seen corresponding path program 41 times [2022-12-12 16:50:43,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:50:43,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955375468] [2022-12-12 16:50:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:50:43,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:50:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:50:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:50:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:50:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955375468] [2022-12-12 16:50:44,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955375468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:50:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884367285] [2022-12-12 16:50:44,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:50:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:50:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:50:44,726 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:50:44,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-12 16:50:44,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 16:50:44,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:50:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 16:50:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:50:45,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:50:45,239 INFO L321 Elim1Store]: treesize reduction 169, result has 27.2 percent of original size [2022-12-12 16:50:45,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 99 [2022-12-12 16:50:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:50:45,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:50:45,717 INFO L321 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-12-12 16:50:45,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 308 [2022-12-12 16:50:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:50:46,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884367285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:50:46,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:50:46,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2022-12-12 16:50:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286603000] [2022-12-12 16:50:46,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:50:46,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 16:50:46,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:50:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 16:50:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-12-12 16:50:46,529 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:50:46,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 5609 transitions, 204180 flow. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:50:46,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:50:46,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:50:46,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 16:51:08,491 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:51:08,491 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:51:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 16:51:08,702 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 16:51:08,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-12 16:51:08,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-12 16:51:08,903 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 2/17 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 186731 conditions, 12391 events (6671/12390 cut-off events. For 1123792/1123818 co-relation queries the response was YES. Maximal size of possible extension queue 2488. Compared 121600 event pairs, 355 based on Foata normal form. 11/14849 useless extension candidates. Maximal degree in co-relation 186286. Up to 8539 conditions per place.). [2022-12-12 16:51:08,904 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 16:51:08,904 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 16:51:08,904 INFO L445 BasicCegarLoop]: Path program histogram: [41, 3, 3, 1, 1] [2022-12-12 16:51:08,908 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 16:51:08,908 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 16:51:08,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 04:51:08 BasicIcfg [2022-12-12 16:51:08,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 16:51:08,910 INFO L158 Benchmark]: Toolchain (without parser) took 817768.91ms. Allocated memory was 168.8MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 144.7MB in the beginning and 667.6MB in the end (delta: -522.9MB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. [2022-12-12 16:51:08,910 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 168.8MB. Free memory was 145.8MB in the beginning and 145.7MB in the end (delta: 89.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 16:51:08,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.77ms. Allocated memory is still 168.8MB. Free memory was 144.7MB in the beginning and 133.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 16:51:08,910 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.31ms. Allocated memory is still 168.8MB. Free memory was 133.1MB in the beginning and 131.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 16:51:08,910 INFO L158 Benchmark]: Boogie Preprocessor took 27.55ms. Allocated memory is still 168.8MB. Free memory was 131.5MB in the beginning and 130.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:51:08,910 INFO L158 Benchmark]: RCFGBuilder took 426.24ms. Allocated memory is still 168.8MB. Free memory was 129.5MB in the beginning and 114.3MB in the end (delta: 15.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-12 16:51:08,910 INFO L158 Benchmark]: TraceAbstraction took 817019.57ms. Allocated memory was 168.8MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 112.7MB in the beginning and 667.6MB in the end (delta: -554.9MB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. [2022-12-12 16:51:08,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 168.8MB. Free memory was 145.8MB in the beginning and 145.7MB in the end (delta: 89.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 247.77ms. Allocated memory is still 168.8MB. Free memory was 144.7MB in the beginning and 133.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.31ms. Allocated memory is still 168.8MB. Free memory was 133.1MB in the beginning and 131.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.55ms. Allocated memory is still 168.8MB. Free memory was 131.5MB in the beginning and 130.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 426.24ms. Allocated memory is still 168.8MB. Free memory was 129.5MB in the beginning and 114.3MB in the end (delta: 15.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 817019.57ms. Allocated memory was 168.8MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 112.7MB in the beginning and 667.6MB in the end (delta: -554.9MB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 137 PlacesBefore, 21 PlacesAfterwards, 144 TransitionsBefore, 17 TransitionsAfterwards, 1942 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 69 TrivialYvCompositions, 47 ConcurrentYvCompositions, 11 ChoiceCompositions, 127 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 1248, independent unconditional: 0, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 0, independent unconditional: 1248, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 0, independent unconditional: 1248, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 0, independent unconditional: 1248, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1115, independent: 1113, independent conditional: 0, independent unconditional: 1113, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1115, independent: 1113, independent conditional: 0, independent unconditional: 1113, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1250, independent: 135, independent conditional: 0, independent unconditional: 135, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 1115, unknown conditional: 0, unknown unconditional: 1115] , Statistics on independence cache: Total cache size (in pairs): 2123, Positive cache size: 2121, Positive conditional cache size: 0, Positive unconditional cache size: 2121, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 2/17 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 186731 conditions, 12391 events (6671/12390 cut-off events. For 1123792/1123818 co-relation queries the response was YES. Maximal size of possible extension queue 2488. Compared 121600 event pairs, 355 based on Foata normal form. 11/14849 useless extension candidates. Maximal degree in co-relation 186286. Up to 8539 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 2/17 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 186731 conditions, 12391 events (6671/12390 cut-off events. For 1123792/1123818 co-relation queries the response was YES. Maximal size of possible extension queue 2488. Compared 121600 event pairs, 355 based on Foata normal form. 11/14849 useless extension candidates. Maximal degree in co-relation 186286. Up to 8539 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 2/17 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 186731 conditions, 12391 events (6671/12390 cut-off events. For 1123792/1123818 co-relation queries the response was YES. Maximal size of possible extension queue 2488. Compared 121600 event pairs, 355 based on Foata normal form. 11/14849 useless extension candidates. Maximal degree in co-relation 186286. Up to 8539 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 189 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: 816.9s, OverallIterations: 49, TraceHistogramMax: 4, PathProgramHistogramMax: 41, EmptinessCheckTime: 0.0s, AutomataDifference: 763.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 36 mSolverCounterUnknown, 5940 SdHoareTripleChecker+Valid, 35.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5940 mSDsluCounter, 577 SdHoareTripleChecker+Invalid, 32.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 416 mSDsCounter, 1373 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26810 IncrementalHoareTripleChecker+Invalid, 28219 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1373 mSolverCounterUnsat, 161 mSDtfsCounter, 26810 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3299 GetRequests, 1781 SyntacticMatches, 47 SemanticMatches, 1471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13633 ImplicationChecksByTransitivity, 41.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204180occurred in iteration=48, InterpolantAutomatonStates: 1091, 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: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 35.0s InterpolantComputationTime, 1865 NumberOfCodeBlocks, 1853 NumberOfCodeBlocksAsserted, 150 NumberOfCheckSat, 2568 ConstructedInterpolants, 23 QuantifiedInterpolants, 24547 SizeOfPredicates, 219 NumberOfNonLiveVariables, 9350 ConjunctsInSsa, 738 ConjunctsInUnsatCore, 135 InterpolantComputations, 8 PerfectInterpolantSequences, 542/1425 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown