/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 --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:02:24,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:02:24,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:02:24,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:02:24,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:02:24,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:02:24,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:02:24,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:02:24,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:02:24,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:02:24,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:02:24,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:02:24,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:02:24,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:02:24,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:02:24,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:02:24,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:02:24,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:02:24,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:02:24,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:02:24,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:02:24,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:02:24,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:02:24,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:02:24,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:02:24,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:02:24,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:02:24,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:02:24,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:02:24,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:02:24,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:02:24,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:02:24,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:02:24,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:02:24,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:02:24,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:02:24,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:02:24,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:02:24,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:02:24,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:02:24,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:02:24,554 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 23:02:24,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:02:24,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:02:24,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:02:24,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:02:24,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:02:24,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:02:24,585 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:02:24,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:02:24,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:02:24,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:02:24,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:02:24,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:02:24,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:02:24,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:02:24,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:02:24,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:02:24,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:02:24,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:02:24,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:02:24,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:02:24,587 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:02:24,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:02:24,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:02:24,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:02:24,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:02:24,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:02:24,839 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:02:24,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2022-12-12 23:02:25,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:02:25,884 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:02:25,885 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2022-12-12 23:02:25,897 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260ca66d7/dd27562afaf6414ea51f0f7a56f19db0/FLAG6a2d2e31b [2022-12-12 23:02:25,915 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260ca66d7/dd27562afaf6414ea51f0f7a56f19db0 [2022-12-12 23:02:25,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:02:25,917 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:02:25,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:02:25,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:02:25,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:02:25,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:02:25" (1/1) ... [2022-12-12 23:02:25,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3165c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:25, skipping insertion in model container [2022-12-12 23:02:25,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:02:25" (1/1) ... [2022-12-12 23:02:25,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:02:25,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:02:26,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:02:26,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:02:26,076 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:02:26,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:02:26,090 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/popl20-counter-fun.wvr.c[2681,2694] [2022-12-12 23:02:26,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:02:26,108 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:02:26,122 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:02:26,125 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:02:26,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:02:26,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:02:26,140 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/popl20-counter-fun.wvr.c[2681,2694] [2022-12-12 23:02:26,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:02:26,157 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:02:26,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26 WrapperNode [2022-12-12 23:02:26,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:02:26,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:02:26,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:02:26,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:02:26,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,205 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-12-12 23:02:26,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:02:26,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:02:26,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:02:26,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:02:26,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,239 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:02:26,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:02:26,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:02:26,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:02:26,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (1/1) ... [2022-12-12 23:02:26,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:02:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:26,293 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 23:02:26,320 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 23:02:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:02:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:02:26,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:02:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:02:26,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:02:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:02:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:02:26,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:02:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:02:26,346 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 23:02:26,416 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:02:26,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:02:26,685 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:02:26,834 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:02:26,834 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 23:02:26,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:02:26 BoogieIcfgContainer [2022-12-12 23:02:26,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:02:26,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:02:26,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:02:26,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:02:26,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:02:25" (1/3) ... [2022-12-12 23:02:26,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3718214b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:02:26, skipping insertion in model container [2022-12-12 23:02:26,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:02:26" (2/3) ... [2022-12-12 23:02:26,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3718214b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:02:26, skipping insertion in model container [2022-12-12 23:02:26,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:02:26" (3/3) ... [2022-12-12 23:02:26,844 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-12-12 23:02:26,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:02:26,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:02:26,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:02:26,913 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 23:02:26,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 150 transitions, 316 flow [2022-12-12 23:02:27,006 INFO L130 PetriNetUnfolder]: 13/148 cut-off events. [2022-12-12 23:02:27,007 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:02:27,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 13/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-12-12 23:02:27,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 150 transitions, 316 flow [2022-12-12 23:02:27,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 140 transitions, 292 flow [2022-12-12 23:02:27,020 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:02:27,038 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 140 transitions, 292 flow [2022-12-12 23:02:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 140 transitions, 292 flow [2022-12-12 23:02:27,089 INFO L130 PetriNetUnfolder]: 13/140 cut-off events. [2022-12-12 23:02:27,089 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:02:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 13/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-12-12 23:02:27,091 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 140 transitions, 292 flow [2022-12-12 23:02:27,092 INFO L226 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-12 23:02:31,549 INFO L241 LiptonReduction]: Total number of compositions: 121 [2022-12-12 23:02:31,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:02:31,563 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;@3f245312, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:02:31,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 23:02:31,567 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2022-12-12 23:02:31,567 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:02:31,567 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:31,567 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:31,568 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 23:02:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash 723377221, now seen corresponding path program 1 times [2022-12-12 23:02:31,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:31,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992928133] [2022-12-12 23:02:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:31,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:31,899 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 23:02:31,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992928133] [2022-12-12 23:02:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992928133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:02:31,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:02:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 23:02:31,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700723428] [2022-12-12 23:02:31,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:02:31,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:02:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:02:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:02:31,919 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:02:31,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 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 23:02:31,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:31,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:02:31,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:31,970 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2022-12-12 23:02:31,970 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-12 23:02:31,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 312 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2022-12-12 23:02:31,973 INFO L137 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2022-12-12 23:02:31,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2022-12-12 23:02:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:02:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:02:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2022-12-12 23:02:31,980 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2022-12-12 23:02:31,984 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2022-12-12 23:02:31,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 29 transitions, 133 flow [2022-12-12 23:02:31,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 28 transitions, 126 flow [2022-12-12 23:02:31,987 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 28 transitions, 126 flow [2022-12-12 23:02:31,987 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 23:02:31,988 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:31,988 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:31,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:02:31,988 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 23:02:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1532126613, now seen corresponding path program 1 times [2022-12-12 23:02:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:31,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049335931] [2022-12-12 23:02:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:02:32,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049335931] [2022-12-12 23:02:32,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049335931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:02:32,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:02:32,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:02:32,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220034606] [2022-12-12 23:02:32,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:02:32,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:02:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:02:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:02:32,118 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:32,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 126 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 23:02:32,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:32,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:32,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:32,218 INFO L130 PetriNetUnfolder]: 94/177 cut-off events. [2022-12-12 23:02:32,218 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-12-12 23:02:32,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 177 events. 94/177 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 577 event pairs, 8 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 427. Up to 99 conditions per place. [2022-12-12 23:02:32,219 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 43 selfloop transitions, 5 changer transitions 8/56 dead transitions. [2022-12-12 23:02:32,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 56 transitions, 361 flow [2022-12-12 23:02:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2022-12-12 23:02:32,222 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2022-12-12 23:02:32,223 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2022-12-12 23:02:32,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 56 transitions, 361 flow [2022-12-12 23:02:32,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 48 transitions, 309 flow [2022-12-12 23:02:32,225 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 48 transitions, 309 flow [2022-12-12 23:02:32,225 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 23:02:32,225 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:32,225 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:32,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:02:32,225 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 23:02:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1968363369, now seen corresponding path program 2 times [2022-12-12 23:02:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:32,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983796502] [2022-12-12 23:02:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:02:32,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:32,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983796502] [2022-12-12 23:02:32,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983796502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:02:32,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:02:32,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:02:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195365101] [2022-12-12 23:02:32,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:02:32,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:02:32,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:02:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:02:32,299 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:32,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 48 transitions, 309 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 23:02:32,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:32,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:32,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:32,365 INFO L130 PetriNetUnfolder]: 104/205 cut-off events. [2022-12-12 23:02:32,365 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-12-12 23:02:32,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 205 events. 104/205 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 690 event pairs, 8 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 692. Up to 133 conditions per place. [2022-12-12 23:02:32,366 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 59 selfloop transitions, 11 changer transitions 18/88 dead transitions. [2022-12-12 23:02:32,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 88 transitions, 739 flow [2022-12-12 23:02:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:02:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:02:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 46 transitions. [2022-12-12 23:02:32,367 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2022-12-12 23:02:32,368 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2022-12-12 23:02:32,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 88 transitions, 739 flow [2022-12-12 23:02:32,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 70 transitions, 588 flow [2022-12-12 23:02:32,369 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 70 transitions, 588 flow [2022-12-12 23:02:32,369 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 23:02:32,369 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:32,369 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:02:32,369 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 23:02:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash -788188085, now seen corresponding path program 1 times [2022-12-12 23:02:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494733826] [2022-12-12 23:02:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:02:32,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494733826] [2022-12-12 23:02:32,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494733826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068857931] [2022-12-12 23:02:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:32,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:32,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:32,435 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 23:02:32,453 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 23:02:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:32,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:02:32,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:02:32,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068857931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:02:32,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:02:32,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-12 23:02:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034021226] [2022-12-12 23:02:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:02:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:02:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:02:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-12 23:02:32,611 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:02:32,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 70 transitions, 588 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 23:02:32,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:32,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:02:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:32,678 INFO L130 PetriNetUnfolder]: 113/237 cut-off events. [2022-12-12 23:02:32,678 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-12-12 23:02:32,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 237 events. 113/237 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 854 event pairs, 8 based on Foata normal form. 32/224 useless extension candidates. Maximal degree in co-relation 707. Up to 156 conditions per place. [2022-12-12 23:02:32,680 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 65 selfloop transitions, 2 changer transitions 37/108 dead transitions. [2022-12-12 23:02:32,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 108 transitions, 1124 flow [2022-12-12 23:02:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2022-12-12 23:02:32,681 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2022-12-12 23:02:32,681 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2022-12-12 23:02:32,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 108 transitions, 1124 flow [2022-12-12 23:02:32,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 71 transitions, 730 flow [2022-12-12 23:02:32,683 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 71 transitions, 730 flow [2022-12-12 23:02:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 23:02:32,683 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:32,683 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 23:02:32,703 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 23:02:32,888 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 23:02:32,888 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 23:02:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash 655009946, now seen corresponding path program 1 times [2022-12-12 23:02:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:32,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138888053] [2022-12-12 23:02:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:32,978 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 23:02:32,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:32,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138888053] [2022-12-12 23:02:32,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138888053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679417993] [2022-12-12 23:02:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:32,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:32,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:32,980 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 23:02:32,982 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 23:02:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:33,084 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 23:02:33,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:02:33,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679417993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:02:33,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:02:33,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-12 23:02:33,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543586298] [2022-12-12 23:02:33,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:02:33,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:02:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:33,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:02:33,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-12 23:02:33,086 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:02:33,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 71 transitions, 730 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23:02:33,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:33,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:02:33,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:33,147 INFO L130 PetriNetUnfolder]: 104/206 cut-off events. [2022-12-12 23:02:33,147 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2022-12-12 23:02:33,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 206 events. 104/206 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 654 event pairs, 8 based on Foata normal form. 16/179 useless extension candidates. Maximal degree in co-relation 836. Up to 176 conditions per place. [2022-12-12 23:02:33,149 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 66 selfloop transitions, 2 changer transitions 17/89 dead transitions. [2022-12-12 23:02:33,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 89 transitions, 1092 flow [2022-12-12 23:02:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:02:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:02:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-12-12 23:02:33,150 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2022-12-12 23:02:33,151 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2022-12-12 23:02:33,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 89 transitions, 1092 flow [2022-12-12 23:02:33,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 72 transitions, 876 flow [2022-12-12 23:02:33,152 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 72 transitions, 876 flow [2022-12-12 23:02:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23:02:33,153 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:33,153 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:33,157 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 23:02:33,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:33,357 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 23:02:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1187302516, now seen corresponding path program 1 times [2022-12-12 23:02:33,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:33,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027551778] [2022-12-12 23:02:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:33,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:33,425 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 23:02:33,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:33,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027551778] [2022-12-12 23:02:33,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027551778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:33,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708020797] [2022-12-12 23:02:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:33,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:33,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:33,474 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 23:02:33,475 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 23:02:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 23:02:33,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:33,565 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 23:02:33,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:33,582 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 23:02:33,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708020797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:33,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:33,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-12 23:02:33,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99601893] [2022-12-12 23:02:33,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:33,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:02:33,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:02:33,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-12 23:02:33,584 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:33,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 72 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 23:02:33,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:33,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:33,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:33,693 INFO L130 PetriNetUnfolder]: 104/191 cut-off events. [2022-12-12 23:02:33,693 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-12 23:02:33,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1308 conditions, 191 events. 104/191 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 547 event pairs, 8 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 1082. Up to 171 conditions per place. [2022-12-12 23:02:33,695 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 73 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2022-12-12 23:02:33,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 82 transitions, 1157 flow [2022-12-12 23:02:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 23:02:33,696 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2022-12-12 23:02:33,696 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2022-12-12 23:02:33,696 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 82 transitions, 1157 flow [2022-12-12 23:02:33,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 82 transitions, 1157 flow [2022-12-12 23:02:33,698 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 82 transitions, 1157 flow [2022-12-12 23:02:33,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 23:02:33,698 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:33,698 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:33,713 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 23:02:33,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:33,903 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 23:02:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1018316638, now seen corresponding path program 1 times [2022-12-12 23:02:33,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413654305] [2022-12-12 23:02:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:33,952 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 23:02:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413654305] [2022-12-12 23:02:33,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413654305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804677106] [2022-12-12 23:02:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:33,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:33,968 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 23:02:33,969 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 23:02:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:34,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 23:02:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:34,052 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 23:02:34,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:34,066 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 23:02:34,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804677106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:34,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:34,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-12 23:02:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828368133] [2022-12-12 23:02:34,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:34,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:02:34,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:02:34,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-12 23:02:34,068 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:34,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 82 transitions, 1157 flow. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 23:02:34,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:34,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:34,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:34,181 INFO L130 PetriNetUnfolder]: 110/201 cut-off events. [2022-12-12 23:02:34,181 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-12 23:02:34,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 201 events. 110/201 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 593 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 1323. Up to 181 conditions per place. [2022-12-12 23:02:34,183 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 81 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2022-12-12 23:02:34,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 92 transitions, 1478 flow [2022-12-12 23:02:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-12-12 23:02:34,183 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2022-12-12 23:02:34,184 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2022-12-12 23:02:34,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 92 transitions, 1478 flow [2022-12-12 23:02:34,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 92 transitions, 1478 flow [2022-12-12 23:02:34,185 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 92 transitions, 1478 flow [2022-12-12 23:02:34,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 23:02:34,186 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:34,186 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:34,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-12 23:02:34,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:34,391 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 23:02:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1736166006, now seen corresponding path program 2 times [2022-12-12 23:02:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:34,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971879173] [2022-12-12 23:02:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:02:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971879173] [2022-12-12 23:02:34,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971879173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:02:34,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:02:34,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:02:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515945997] [2022-12-12 23:02:34,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:02:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:02:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:02:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:02:34,440 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:34,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 92 transitions, 1478 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 23:02:34,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:34,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:34,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:34,523 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2022-12-12 23:02:34,523 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-12-12 23:02:34,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 195 events. 104/195 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 583 event pairs, 0 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 1440. Up to 175 conditions per place. [2022-12-12 23:02:34,525 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 74 selfloop transitions, 10 changer transitions 6/90 dead transitions. [2022-12-12 23:02:34,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 90 transitions, 1626 flow [2022-12-12 23:02:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-12 23:02:34,526 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2022-12-12 23:02:34,526 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2022-12-12 23:02:34,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 90 transitions, 1626 flow [2022-12-12 23:02:34,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 84 transitions, 1515 flow [2022-12-12 23:02:34,528 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 84 transitions, 1515 flow [2022-12-12 23:02:34,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 23:02:34,529 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:34,529 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:34,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 23:02:34,529 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 23:02:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1377940936, now seen corresponding path program 2 times [2022-12-12 23:02:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:34,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256818039] [2022-12-12 23:02:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:34,583 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 23:02:34,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256818039] [2022-12-12 23:02:34,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256818039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172826509] [2022-12-12 23:02:34,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:02:34,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:34,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:34,585 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 23:02:34,587 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 23:02:34,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:02:34,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 23:02:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:34,696 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 23:02:34,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:34,715 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 23:02:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172826509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:34,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 23:02:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322275950] [2022-12-12 23:02:34,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:02:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:02:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:02:34,717 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:34,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 84 transitions, 1515 flow. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 23:02:34,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:34,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:34,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:34,857 INFO L130 PetriNetUnfolder]: 118/215 cut-off events. [2022-12-12 23:02:34,857 INFO L131 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-12-12 23:02:34,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 215 events. 118/215 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 638 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 1806. Up to 195 conditions per place. [2022-12-12 23:02:34,859 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 81 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2022-12-12 23:02:34,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 96 transitions, 1929 flow [2022-12-12 23:02:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:02:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:02:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 59 transitions. [2022-12-12 23:02:34,860 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3881578947368421 [2022-12-12 23:02:34,861 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2022-12-12 23:02:34,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 96 transitions, 1929 flow [2022-12-12 23:02:34,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 96 transitions, 1929 flow [2022-12-12 23:02:34,863 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 96 transitions, 1929 flow [2022-12-12 23:02:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 23:02:34,863 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:34,863 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:34,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 23:02:35,068 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 23:02:35,069 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 23:02:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1841175214, now seen corresponding path program 3 times [2022-12-12 23:02:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547125217] [2022-12-12 23:02:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:35,116 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 23:02:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547125217] [2022-12-12 23:02:35,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547125217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:35,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469497302] [2022-12-12 23:02:35,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:02:35,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:35,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:35,129 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 23:02:35,130 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 23:02:35,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:02:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 23:02:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:35,223 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 23:02:35,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:35,239 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 23:02:35,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469497302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:35,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:35,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 23:02:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311275041] [2022-12-12 23:02:35,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:35,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:02:35,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:02:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:02:35,240 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:35,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 96 transitions, 1929 flow. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:02:35,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:35,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:35,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:35,352 INFO L130 PetriNetUnfolder]: 124/225 cut-off events. [2022-12-12 23:02:35,353 INFO L131 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-12-12 23:02:35,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 225 events. 124/225 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 679 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 2101. Up to 205 conditions per place. [2022-12-12 23:02:35,355 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 89 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2022-12-12 23:02:35,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 100 transitions, 2209 flow [2022-12-12 23:02:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-12 23:02:35,355 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2022-12-12 23:02:35,356 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2022-12-12 23:02:35,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 100 transitions, 2209 flow [2022-12-12 23:02:35,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 100 transitions, 2209 flow [2022-12-12 23:02:35,358 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 100 transitions, 2209 flow [2022-12-12 23:02:35,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:02:35,358 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:35,358 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:35,373 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 23:02:35,563 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 23:02:35,563 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 23:02:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 235031324, now seen corresponding path program 3 times [2022-12-12 23:02:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004425425] [2022-12-12 23:02:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:35,608 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 23:02:35,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:35,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004425425] [2022-12-12 23:02:35,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004425425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:35,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828912014] [2022-12-12 23:02:35,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:02:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:35,625 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 23:02:35,626 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 23:02:35,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:02:35,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:35,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 23:02:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:35,722 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 23:02:35,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:35,739 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 23:02:35,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828912014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:35,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:35,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 23:02:35,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196542763] [2022-12-12 23:02:35,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:35,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:02:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:02:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:02:35,740 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:35,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 100 transitions, 2209 flow. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 23:02:35,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:35,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:35,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:35,849 INFO L130 PetriNetUnfolder]: 116/209 cut-off events. [2022-12-12 23:02:35,850 INFO L131 PetriNetUnfolder]: For 209/209 co-relation queries the response was YES. [2022-12-12 23:02:35,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 209 events. 116/209 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 606 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 2127. Up to 189 conditions per place. [2022-12-12 23:02:35,852 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 80 selfloop transitions, 12 changer transitions 0/92 dead transitions. [2022-12-12 23:02:35,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 2211 flow [2022-12-12 23:02:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:02:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:02:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 36 transitions. [2022-12-12 23:02:35,852 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2022-12-12 23:02:35,853 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 38 predicate places. [2022-12-12 23:02:35,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 92 transitions, 2211 flow [2022-12-12 23:02:35,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 92 transitions, 2211 flow [2022-12-12 23:02:35,855 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 92 transitions, 2211 flow [2022-12-12 23:02:35,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 23:02:35,855 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:35,855 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:35,862 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 23:02:36,060 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 23:02:36,060 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 23:02:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1310882470, now seen corresponding path program 4 times [2022-12-12 23:02:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948772277] [2022-12-12 23:02:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:36,132 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 23:02:36,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:36,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948772277] [2022-12-12 23:02:36,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948772277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051916432] [2022-12-12 23:02:36,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:02:36,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:36,137 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 23:02:36,139 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 23:02:36,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:02:36,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 23:02:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:36,220 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 23:02:36,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:36,235 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 23:02:36,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051916432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:36,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:36,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 23:02:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147445805] [2022-12-12 23:02:36,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:36,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:02:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:02:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:02:36,237 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:36,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 92 transitions, 2211 flow. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:02:36,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:36,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:36,392 INFO L130 PetriNetUnfolder]: 112/199 cut-off events. [2022-12-12 23:02:36,393 INFO L131 PetriNetUnfolder]: For 206/206 co-relation queries the response was YES. [2022-12-12 23:02:36,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 199 events. 112/199 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 571 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 2202. Up to 179 conditions per place. [2022-12-12 23:02:36,395 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 71 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2022-12-12 23:02:36,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 2285 flow [2022-12-12 23:02:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:02:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:02:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 48 transitions. [2022-12-12 23:02:36,396 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2022-12-12 23:02:36,396 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 44 predicate places. [2022-12-12 23:02:36,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 88 transitions, 2285 flow [2022-12-12 23:02:36,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 88 transitions, 2285 flow [2022-12-12 23:02:36,398 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 88 transitions, 2285 flow [2022-12-12 23:02:36,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:02:36,398 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:36,399 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:36,416 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 23:02:36,603 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 23:02:36,604 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 23:02:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1845718746, now seen corresponding path program 1 times [2022-12-12 23:02:36,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:36,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512648215] [2022-12-12 23:02:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:36,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:02:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:36,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512648215] [2022-12-12 23:02:36,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512648215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:36,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934449985] [2022-12-12 23:02:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:36,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:36,976 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 23:02:36,981 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 23:02:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:37,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 23:02:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:37,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-12-12 23:02:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:02:37,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:37,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-12-12 23:02:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:02:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934449985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:37,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:37,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 12 [2022-12-12 23:02:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060086572] [2022-12-12 23:02:37,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:02:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:02:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:02:37,208 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:02:37,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 88 transitions, 2285 flow. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 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 23:02:37,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:37,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:02:37,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:37,734 INFO L130 PetriNetUnfolder]: 481/855 cut-off events. [2022-12-12 23:02:37,734 INFO L131 PetriNetUnfolder]: For 1554/1554 co-relation queries the response was YES. [2022-12-12 23:02:37,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11724 conditions, 855 events. 481/855 cut-off events. For 1554/1554 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4007 event pairs, 0 based on Foata normal form. 3/704 useless extension candidates. Maximal degree in co-relation 3074. Up to 767 conditions per place. [2022-12-12 23:02:37,739 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 145 selfloop transitions, 45 changer transitions 146/342 dead transitions. [2022-12-12 23:02:37,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 342 transitions, 9690 flow [2022-12-12 23:02:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 23:02:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 23:02:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 137 transitions. [2022-12-12 23:02:37,741 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4506578947368421 [2022-12-12 23:02:37,741 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 59 predicate places. [2022-12-12 23:02:37,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 342 transitions, 9690 flow [2022-12-12 23:02:37,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 196 transitions, 5515 flow [2022-12-12 23:02:37,757 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 196 transitions, 5515 flow [2022-12-12 23:02:37,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 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 23:02:37,757 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:37,757 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:37,779 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 23:02:37,959 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 23:02:37,960 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 23:02:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash -144186385, now seen corresponding path program 2 times [2022-12-12 23:02:37,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:37,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675610251] [2022-12-12 23:02:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:37,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:02:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675610251] [2022-12-12 23:02:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675610251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770485415] [2022-12-12 23:02:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:02:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:38,111 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 23:02:38,113 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 23:02:38,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:02:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 23:02:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:38,248 INFO L321 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-12-12 23:02:38,249 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 36 [2022-12-12 23:02:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:02:38,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:38,290 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-12-12 23:02:38,291 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 39 [2022-12-12 23:02:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:38,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770485415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:38,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:38,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 2] total 9 [2022-12-12 23:02:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839374944] [2022-12-12 23:02:38,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:38,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:02:38,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:02:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:02:38,303 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:02:38,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 196 transitions, 5515 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 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 23:02:38,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:38,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:02:38,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:38,549 INFO L130 PetriNetUnfolder]: 473/866 cut-off events. [2022-12-12 23:02:38,550 INFO L131 PetriNetUnfolder]: For 1763/1763 co-relation queries the response was YES. [2022-12-12 23:02:38,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12712 conditions, 866 events. 473/866 cut-off events. For 1763/1763 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4092 event pairs, 0 based on Foata normal form. 5/684 useless extension candidates. Maximal degree in co-relation 4358. Up to 794 conditions per place. [2022-12-12 23:02:38,556 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 210 selfloop transitions, 54 changer transitions 52/322 dead transitions. [2022-12-12 23:02:38,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 322 transitions, 9717 flow [2022-12-12 23:02:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 23:02:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 23:02:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 92 transitions. [2022-12-12 23:02:38,557 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2022-12-12 23:02:38,557 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 66 predicate places. [2022-12-12 23:02:38,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 322 transitions, 9717 flow [2022-12-12 23:02:38,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 270 transitions, 8133 flow [2022-12-12 23:02:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 270 transitions, 8133 flow [2022-12-12 23:02:38,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 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 23:02:38,565 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:38,565 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:38,572 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 23:02:38,769 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 23:02:38,770 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 23:02:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 531413589, now seen corresponding path program 3 times [2022-12-12 23:02:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:38,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091525800] [2022-12-12 23:02:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:02:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091525800] [2022-12-12 23:02:39,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091525800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913543938] [2022-12-12 23:02:39,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:02:39,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:39,186 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 23:02:39,188 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 23:02:39,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:02:39,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 23:02:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:39,316 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-12 23:02:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 23 [2022-12-12 23:02:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:02:39,376 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 23:02:39,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-12-12 23:02:39,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-12 23:02:39,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 23:02:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:02:39,512 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 23:02:39,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2022-12-12 23:02:39,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-12 23:02:39,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 23:02:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:02:39,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:39,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:02:39,774 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 156 treesize of output 96 [2022-12-12 23:02:39,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:02:39,795 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 365 treesize of output 323 [2022-12-12 23:02:39,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:02:39,849 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 291 treesize of output 265 [2022-12-12 23:02:39,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:02:39,867 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 106 [2022-12-12 23:02:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:02:41,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913543938] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:41,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:41,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:02:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865457620] [2022-12-12 23:02:41,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:41,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:02:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:02:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-12 23:02:41,895 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:02:41,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 270 transitions, 8133 flow. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 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 23:02:41,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:41,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:02:41,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:42,801 INFO L130 PetriNetUnfolder]: 615/1166 cut-off events. [2022-12-12 23:02:42,801 INFO L131 PetriNetUnfolder]: For 3747/3747 co-relation queries the response was YES. [2022-12-12 23:02:42,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18161 conditions, 1166 events. 615/1166 cut-off events. For 3747/3747 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6181 event pairs, 3 based on Foata normal form. 3/952 useless extension candidates. Maximal degree in co-relation 6444. Up to 1062 conditions per place. [2022-12-12 23:02:42,808 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 318 selfloop transitions, 98 changer transitions 28/450 dead transitions. [2022-12-12 23:02:42,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 450 transitions, 14520 flow [2022-12-12 23:02:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 23:02:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 23:02:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 129 transitions. [2022-12-12 23:02:42,810 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2022-12-12 23:02:42,810 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 80 predicate places. [2022-12-12 23:02:42,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 450 transitions, 14520 flow [2022-12-12 23:02:42,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 422 transitions, 13600 flow [2022-12-12 23:02:42,820 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 422 transitions, 13600 flow [2022-12-12 23:02:42,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 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 23:02:42,821 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:42,821 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:42,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-12 23:02:43,025 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 23:02:43,026 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 23:02:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 261479067, now seen corresponding path program 4 times [2022-12-12 23:02:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:43,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691798259] [2022-12-12 23:02:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:43,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:43,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691798259] [2022-12-12 23:02:43,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691798259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893670317] [2022-12-12 23:02:43,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:02:43,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:43,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:43,125 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 23:02:43,126 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 23:02:43,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:02:43,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:43,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893670317] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:43,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:43,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:02:43,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210542151] [2022-12-12 23:02:43,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:43,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:02:43,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:02:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:02:43,275 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:43,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 422 transitions, 13600 flow. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23:02:43,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:43,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:43,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:43,725 INFO L130 PetriNetUnfolder]: 768/1498 cut-off events. [2022-12-12 23:02:43,725 INFO L131 PetriNetUnfolder]: For 3306/3306 co-relation queries the response was YES. [2022-12-12 23:02:43,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25063 conditions, 1498 events. 768/1498 cut-off events. For 3306/3306 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8624 event pairs, 11 based on Foata normal form. 8/1209 useless extension candidates. Maximal degree in co-relation 10223. Up to 1404 conditions per place. [2022-12-12 23:02:43,735 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 545 selfloop transitions, 181 changer transitions 32/758 dead transitions. [2022-12-12 23:02:43,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 758 transitions, 25988 flow [2022-12-12 23:02:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 23:02:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 23:02:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 101 transitions. [2022-12-12 23:02:43,736 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2953216374269006 [2022-12-12 23:02:43,737 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2022-12-12 23:02:43,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 758 transitions, 25988 flow [2022-12-12 23:02:43,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 726 transitions, 24879 flow [2022-12-12 23:02:43,751 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 726 transitions, 24879 flow [2022-12-12 23:02:43,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23:02:43,751 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:43,751 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:43,769 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 23:02:43,955 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 23:02:43,956 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 23:02:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 156469859, now seen corresponding path program 5 times [2022-12-12 23:02:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368700945] [2022-12-12 23:02:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:44,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368700945] [2022-12-12 23:02:44,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368700945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857641740] [2022-12-12 23:02:44,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:02:44,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:44,033 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 23:02:44,067 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 23:02:44,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:02:44,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:44,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-12 23:02:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857641740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:44,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:44,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:02:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77613046] [2022-12-12 23:02:44,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:44,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:02:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:02:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:02:44,204 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:44,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 726 transitions, 24879 flow. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 23:02:44,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:44,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:44,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:44,695 INFO L130 PetriNetUnfolder]: 702/1366 cut-off events. [2022-12-12 23:02:44,695 INFO L131 PetriNetUnfolder]: For 3266/3266 co-relation queries the response was YES. [2022-12-12 23:02:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24160 conditions, 1366 events. 702/1366 cut-off events. For 3266/3266 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7710 event pairs, 3 based on Foata normal form. 4/1113 useless extension candidates. Maximal degree in co-relation 9360. Up to 1272 conditions per place. [2022-12-12 23:02:44,709 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 587 selfloop transitions, 101 changer transitions 19/707 dead transitions. [2022-12-12 23:02:44,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 707 transitions, 25623 flow [2022-12-12 23:02:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:02:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:02:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 65 transitions. [2022-12-12 23:02:44,710 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31100478468899523 [2022-12-12 23:02:44,711 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2022-12-12 23:02:44,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 707 transitions, 25623 flow [2022-12-12 23:02:44,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 688 transitions, 24936 flow [2022-12-12 23:02:44,727 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 688 transitions, 24936 flow [2022-12-12 23:02:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 23:02:44,727 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:44,727 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:44,737 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 23:02:44,932 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 23:02:44,932 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 23:02:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1436969711, now seen corresponding path program 6 times [2022-12-12 23:02:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:44,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161864115] [2022-12-12 23:02:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:45,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161864115] [2022-12-12 23:02:45,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161864115] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844962683] [2022-12-12 23:02:45,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:02:45,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:45,026 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 23:02:45,028 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 23:02:45,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:02:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:45,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844962683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:45,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:45,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:02:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283103757] [2022-12-12 23:02:45,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:45,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:02:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:02:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:02:45,195 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:45,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 688 transitions, 24936 flow. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23:02:45,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:45,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:45,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:45,917 INFO L130 PetriNetUnfolder]: 871/1765 cut-off events. [2022-12-12 23:02:45,925 INFO L131 PetriNetUnfolder]: For 3190/3190 co-relation queries the response was YES. [2022-12-12 23:02:45,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33148 conditions, 1765 events. 871/1765 cut-off events. For 3190/3190 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10963 event pairs, 3 based on Foata normal form. 8/1436 useless extension candidates. Maximal degree in co-relation 13875. Up to 1671 conditions per place. [2022-12-12 23:02:45,963 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 715 selfloop transitions, 234 changer transitions 19/968 dead transitions. [2022-12-12 23:02:45,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 968 transitions, 37084 flow [2022-12-12 23:02:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 23:02:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 23:02:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 117 transitions. [2022-12-12 23:02:45,965 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2799043062200957 [2022-12-12 23:02:45,966 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2022-12-12 23:02:45,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 968 transitions, 37084 flow [2022-12-12 23:02:45,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 949 transitions, 36350 flow [2022-12-12 23:02:45,987 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 949 transitions, 36350 flow [2022-12-12 23:02:45,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23:02:45,987 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:45,987 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:45,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-12 23:02:46,191 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 23:02:46,191 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 23:02:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash 387516315, now seen corresponding path program 7 times [2022-12-12 23:02:46,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:46,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980085200] [2022-12-12 23:02:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980085200] [2022-12-12 23:02:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980085200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598875336] [2022-12-12 23:02:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:02:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:46,309 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 23:02:46,310 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 23:02:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:46,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:46,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598875336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:46,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:46,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:02:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106710079] [2022-12-12 23:02:46,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:46,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:02:46,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:02:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:02:46,472 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:46,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 949 transitions, 36350 flow. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 23:02:46,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:46,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:46,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:47,422 INFO L130 PetriNetUnfolder]: 979/1995 cut-off events. [2022-12-12 23:02:47,423 INFO L131 PetriNetUnfolder]: For 3229/3229 co-relation queries the response was YES. [2022-12-12 23:02:47,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39536 conditions, 1995 events. 979/1995 cut-off events. For 3229/3229 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12746 event pairs, 3 based on Foata normal form. 8/1622 useless extension candidates. Maximal degree in co-relation 16861. Up to 1901 conditions per place. [2022-12-12 23:02:47,436 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 810 selfloop transitions, 300 changer transitions 19/1129 dead transitions. [2022-12-12 23:02:47,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 1129 transitions, 45526 flow [2022-12-12 23:02:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:02:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:02:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 111 transitions. [2022-12-12 23:02:47,438 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29210526315789476 [2022-12-12 23:02:47,438 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 143 predicate places. [2022-12-12 23:02:47,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 1129 transitions, 45526 flow [2022-12-12 23:02:47,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 1110 transitions, 44754 flow [2022-12-12 23:02:47,461 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 1110 transitions, 44754 flow [2022-12-12 23:02:47,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 23:02:47,461 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:47,461 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:47,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-12 23:02:47,666 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 23:02:47,666 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 23:02:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:47,667 INFO L85 PathProgramCache]: Analyzing trace with hash 16002587, now seen corresponding path program 8 times [2022-12-12 23:02:47,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:47,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695963406] [2022-12-12 23:02:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:47,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695963406] [2022-12-12 23:02:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695963406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767938181] [2022-12-12 23:02:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:02:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:47,745 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 23:02:47,759 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 23:02:47,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:02:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:47,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767938181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:47,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:47,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:02:47,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924611658] [2022-12-12 23:02:47,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:47,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:02:47,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:02:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:02:47,921 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:47,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 1110 transitions, 44754 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:02:47,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:47,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:48,753 INFO L130 PetriNetUnfolder]: 891/1747 cut-off events. [2022-12-12 23:02:48,754 INFO L131 PetriNetUnfolder]: For 3158/3158 co-relation queries the response was YES. [2022-12-12 23:02:48,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36278 conditions, 1747 events. 891/1747 cut-off events. For 3158/3158 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10464 event pairs, 3 based on Foata normal form. 8/1426 useless extension candidates. Maximal degree in co-relation 14687. Up to 1653 conditions per place. [2022-12-12 23:02:48,766 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 768 selfloop transitions, 158 changer transitions 38/964 dead transitions. [2022-12-12 23:02:48,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 964 transitions, 40716 flow [2022-12-12 23:02:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:02:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:02:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 84 transitions. [2022-12-12 23:02:48,775 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2022-12-12 23:02:48,780 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2022-12-12 23:02:48,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 964 transitions, 40716 flow [2022-12-12 23:02:48,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 926 transitions, 39114 flow [2022-12-12 23:02:48,800 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 926 transitions, 39114 flow [2022-12-12 23:02:48,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:02:48,800 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:48,801 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:48,808 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 23:02:49,005 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 23:02:49,005 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 23:02:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash -405469924, now seen corresponding path program 9 times [2022-12-12 23:02:49,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:49,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205023663] [2022-12-12 23:02:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:49,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:49,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205023663] [2022-12-12 23:02:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205023663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732620660] [2022-12-12 23:02:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:02:49,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:49,144 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 23:02:49,147 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 23:02:49,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:02:49,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:49,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:49,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732620660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:49,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:49,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:02:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21004962] [2022-12-12 23:02:49,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:49,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:02:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:02:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:02:49,373 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:49,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 926 transitions, 39114 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:02:49,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:49,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:49,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:50,296 INFO L130 PetriNetUnfolder]: 1076/2095 cut-off events. [2022-12-12 23:02:50,297 INFO L131 PetriNetUnfolder]: For 3053/3053 co-relation queries the response was YES. [2022-12-12 23:02:50,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45785 conditions, 2095 events. 1076/2095 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13053 event pairs, 0 based on Foata normal form. 20/1665 useless extension candidates. Maximal degree in co-relation 19807. Up to 2013 conditions per place. [2022-12-12 23:02:50,311 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 986 selfloop transitions, 211 changer transitions 43/1240 dead transitions. [2022-12-12 23:02:50,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 1240 transitions, 54884 flow [2022-12-12 23:02:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:02:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:02:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 119 transitions. [2022-12-12 23:02:50,312 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3131578947368421 [2022-12-12 23:02:50,313 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2022-12-12 23:02:50,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 1240 transitions, 54884 flow [2022-12-12 23:02:50,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 1197 transitions, 52992 flow [2022-12-12 23:02:50,337 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 1197 transitions, 52992 flow [2022-12-12 23:02:50,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:02:50,337 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:50,337 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:50,360 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 23:02:50,561 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 23:02:50,561 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 23:02:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash -668406568, now seen corresponding path program 10 times [2022-12-12 23:02:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:50,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546154229] [2022-12-12 23:02:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:50,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:50,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546154229] [2022-12-12 23:02:50,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546154229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159158279] [2022-12-12 23:02:50,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:02:50,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:50,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:50,653 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 23:02:50,668 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 23:02:50,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:02:50,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:50,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:50,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:50,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:50,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159158279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:50,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:50,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:02:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184203159] [2022-12-12 23:02:50,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:02:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:02:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:02:50,817 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:50,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 1197 transitions, 52992 flow. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 23:02:50,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:50,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:50,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:51,757 INFO L130 PetriNetUnfolder]: 974/1859 cut-off events. [2022-12-12 23:02:51,758 INFO L131 PetriNetUnfolder]: For 3019/3019 co-relation queries the response was YES. [2022-12-12 23:02:51,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42435 conditions, 1859 events. 974/1859 cut-off events. For 3019/3019 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11037 event pairs, 0 based on Foata normal form. 24/1559 useless extension candidates. Maximal degree in co-relation 20093. Up to 1777 conditions per place. [2022-12-12 23:02:51,773 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 970 selfloop transitions, 136 changer transitions 24/1130 dead transitions. [2022-12-12 23:02:51,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 1130 transitions, 52250 flow [2022-12-12 23:02:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:02:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:02:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 98 transitions. [2022-12-12 23:02:51,774 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2022-12-12 23:02:51,775 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 180 predicate places. [2022-12-12 23:02:51,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 1130 transitions, 52250 flow [2022-12-12 23:02:51,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 1106 transitions, 51128 flow [2022-12-12 23:02:51,800 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 1106 transitions, 51128 flow [2022-12-12 23:02:51,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 23:02:51,801 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:51,801 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:51,806 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 23:02:52,005 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 23:02:52,006 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 23:02:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash -443914464, now seen corresponding path program 11 times [2022-12-12 23:02:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126419435] [2022-12-12 23:02:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126419435] [2022-12-12 23:02:52,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126419435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753217729] [2022-12-12 23:02:52,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:02:52,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:52,099 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 23:02:52,139 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 23:02:52,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:02:52,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:52,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:52,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753217729] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:52,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:52,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:02:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088405557] [2022-12-12 23:02:52,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:02:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:02:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:02:52,296 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:52,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 1106 transitions, 51128 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:52,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:52,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:52,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:53,287 INFO L130 PetriNetUnfolder]: 1129/2170 cut-off events. [2022-12-12 23:02:53,287 INFO L131 PetriNetUnfolder]: For 3068/3068 co-relation queries the response was YES. [2022-12-12 23:02:53,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51788 conditions, 2170 events. 1129/2170 cut-off events. For 3068/3068 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13533 event pairs, 0 based on Foata normal form. 8/1802 useless extension candidates. Maximal degree in co-relation 26102. Up to 2088 conditions per place. [2022-12-12 23:02:53,304 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 1092 selfloop transitions, 223 changer transitions 8/1323 dead transitions. [2022-12-12 23:02:53,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1323 transitions, 63861 flow [2022-12-12 23:02:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 23:02:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 23:02:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 109 transitions. [2022-12-12 23:02:53,306 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3824561403508772 [2022-12-12 23:02:53,306 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 194 predicate places. [2022-12-12 23:02:53,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 1323 transitions, 63861 flow [2022-12-12 23:02:53,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 1315 transitions, 63471 flow [2022-12-12 23:02:53,336 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1315 transitions, 63471 flow [2022-12-12 23:02:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:53,336 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:53,337 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:53,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 23:02:53,541 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 23:02:53,541 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 23:02:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:53,542 INFO L85 PathProgramCache]: Analyzing trace with hash -447482340, now seen corresponding path program 12 times [2022-12-12 23:02:53,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:53,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712386557] [2022-12-12 23:02:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:53,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712386557] [2022-12-12 23:02:53,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712386557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578280877] [2022-12-12 23:02:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:02:53,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:53,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:53,607 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 23:02:53,612 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 23:02:53,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:02:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-12 23:02:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578280877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:53,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:53,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:02:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394857686] [2022-12-12 23:02:53,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:53,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:02:53,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:02:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:02:53,829 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:53,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1315 transitions, 63471 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:53,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:53,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:55,008 INFO L130 PetriNetUnfolder]: 1139/2208 cut-off events. [2022-12-12 23:02:55,008 INFO L131 PetriNetUnfolder]: For 3076/3076 co-relation queries the response was YES. [2022-12-12 23:02:55,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54917 conditions, 2208 events. 1139/2208 cut-off events. For 3076/3076 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13953 event pairs, 0 based on Foata normal form. 8/1840 useless extension candidates. Maximal degree in co-relation 28100. Up to 2126 conditions per place. [2022-12-12 23:02:55,027 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1069 selfloop transitions, 270 changer transitions 8/1347 dead transitions. [2022-12-12 23:02:55,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1347 transitions, 67731 flow [2022-12-12 23:02:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 23:02:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 23:02:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 119 transitions. [2022-12-12 23:02:55,028 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2982456140350877 [2022-12-12 23:02:55,029 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 214 predicate places. [2022-12-12 23:02:55,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 1347 transitions, 67731 flow [2022-12-12 23:02:55,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 1339 transitions, 67331 flow [2022-12-12 23:02:55,062 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 1339 transitions, 67331 flow [2022-12-12 23:02:55,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:55,062 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:55,062 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:55,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 23:02:55,267 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 23:02:55,267 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 23:02:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash -558086496, now seen corresponding path program 13 times [2022-12-12 23:02:55,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:55,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846664213] [2022-12-12 23:02:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:55,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:55,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846664213] [2022-12-12 23:02:55,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846664213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129283731] [2022-12-12 23:02:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:02:55,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:55,411 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 23:02:55,418 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 23:02:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:55,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:55,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129283731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:55,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:55,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 23:02:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237304487] [2022-12-12 23:02:55,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:55,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:02:55,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:02:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:02:55,611 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:55,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 1339 transitions, 67331 flow. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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 23:02:55,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:55,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:55,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:56,999 INFO L130 PetriNetUnfolder]: 1183/2302 cut-off events. [2022-12-12 23:02:57,000 INFO L131 PetriNetUnfolder]: For 3093/3093 co-relation queries the response was YES. [2022-12-12 23:02:57,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59581 conditions, 2302 events. 1183/2302 cut-off events. For 3093/3093 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14739 event pairs, 0 based on Foata normal form. 8/1920 useless extension candidates. Maximal degree in co-relation 30872. Up to 2220 conditions per place. [2022-12-12 23:02:57,024 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1104 selfloop transitions, 279 changer transitions 22/1405 dead transitions. [2022-12-12 23:02:57,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1405 transitions, 73474 flow [2022-12-12 23:02:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 23:02:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 23:02:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 117 transitions. [2022-12-12 23:02:57,026 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26773455377574373 [2022-12-12 23:02:57,026 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 235 predicate places. [2022-12-12 23:02:57,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 1405 transitions, 73474 flow [2022-12-12 23:02:57,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 1383 transitions, 72330 flow [2022-12-12 23:02:57,066 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 1383 transitions, 72330 flow [2022-12-12 23:02:57,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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 23:02:57,066 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:57,066 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:57,073 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 23:02:57,270 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 23:02:57,271 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 23:02:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1728093458, now seen corresponding path program 14 times [2022-12-12 23:02:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:57,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28381148] [2022-12-12 23:02:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:57,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:57,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:57,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28381148] [2022-12-12 23:02:57,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28381148] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:57,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150723280] [2022-12-12 23:02:57,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:02:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:57,334 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 23:02:57,336 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 23:02:57,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:02:57,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:57,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150723280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:57,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:57,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-12 23:02:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307040272] [2022-12-12 23:02:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:02:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:02:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:02:57,508 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:57,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 1383 transitions, 72330 flow. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:57,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:57,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:57,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:02:59,004 INFO L130 PetriNetUnfolder]: 1317/2552 cut-off events. [2022-12-12 23:02:59,004 INFO L131 PetriNetUnfolder]: For 3209/3209 co-relation queries the response was YES. [2022-12-12 23:02:59,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68652 conditions, 2552 events. 1317/2552 cut-off events. For 3209/3209 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16625 event pairs, 0 based on Foata normal form. 0/2108 useless extension candidates. Maximal degree in co-relation 36041. Up to 2470 conditions per place. [2022-12-12 23:02:59,027 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 1417 selfloop transitions, 143 changer transitions 0/1560 dead transitions. [2022-12-12 23:02:59,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1560 transitions, 84684 flow [2022-12-12 23:02:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:02:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:02:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2022-12-12 23:02:59,028 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38345864661654133 [2022-12-12 23:02:59,028 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2022-12-12 23:02:59,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 1560 transitions, 84684 flow [2022-12-12 23:02:59,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 1560 transitions, 84684 flow [2022-12-12 23:02:59,071 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 1560 transitions, 84684 flow [2022-12-12 23:02:59,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:59,072 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:02:59,072 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:02:59,078 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 23:02:59,276 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 23:02:59,277 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 23:02:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:02:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash -341509200, now seen corresponding path program 15 times [2022-12-12 23:02:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:02:59,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360936065] [2022-12-12 23:02:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:02:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:02:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:02:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:59,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:02:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360936065] [2022-12-12 23:02:59,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360936065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:02:59,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972506396] [2022-12-12 23:02:59,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:02:59,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:02:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:02:59,344 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 23:02:59,346 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 23:02:59,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:02:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:02:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:02:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:02:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:02:59,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:02:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-12 23:02:59,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972506396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:02:59,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:02:59,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:02:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029442025] [2022-12-12 23:02:59,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:02:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:02:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:02:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:02:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:02:59,580 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:02:59,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 1560 transitions, 84684 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:02:59,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:02:59,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:02:59,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:01,201 INFO L130 PetriNetUnfolder]: 1331/2602 cut-off events. [2022-12-12 23:03:01,201 INFO L131 PetriNetUnfolder]: For 3166/3166 co-relation queries the response was YES. [2022-12-12 23:03:01,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72611 conditions, 2602 events. 1331/2602 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17171 event pairs, 0 based on Foata normal form. 16/2180 useless extension candidates. Maximal degree in co-relation 38419. Up to 2520 conditions per place. [2022-12-12 23:03:01,226 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1488 selfloop transitions, 93 changer transitions 16/1597 dead transitions. [2022-12-12 23:03:01,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1597 transitions, 89894 flow [2022-12-12 23:03:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:03:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:03:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2022-12-12 23:03:01,227 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3923444976076555 [2022-12-12 23:03:01,227 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 247 predicate places. [2022-12-12 23:03:01,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 1597 transitions, 89894 flow [2022-12-12 23:03:01,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 1581 transitions, 88986 flow [2022-12-12 23:03:01,272 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 1581 transitions, 88986 flow [2022-12-12 23:03:01,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:03:01,273 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:01,273 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:01,279 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 23:03:01,478 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 23:03:01,478 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 23:03:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1365486164, now seen corresponding path program 16 times [2022-12-12 23:03:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793876886] [2022-12-12 23:03:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793876886] [2022-12-12 23:03:01,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793876886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742908865] [2022-12-12 23:03:01,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:03:01,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:01,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:01,608 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 23:03:01,610 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 23:03:01,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:03:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:01,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:01,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742908865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:01,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:01,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-12 23:03:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998788547] [2022-12-12 23:03:01,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:01,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:03:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:03:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:03:01,768 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:01,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 1581 transitions, 88986 flow. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:03:01,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:01,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:01,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:03,402 INFO L130 PetriNetUnfolder]: 1327/2590 cut-off events. [2022-12-12 23:03:03,403 INFO L131 PetriNetUnfolder]: For 3264/3264 co-relation queries the response was YES. [2022-12-12 23:03:03,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74862 conditions, 2590 events. 1327/2590 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17033 event pairs, 0 based on Foata normal form. 4/2164 useless extension candidates. Maximal degree in co-relation 39910. Up to 2508 conditions per place. [2022-12-12 23:03:03,431 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1343 selfloop transitions, 233 changer transitions 11/1587 dead transitions. [2022-12-12 23:03:03,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1587 transitions, 92496 flow [2022-12-12 23:03:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:03:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:03:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2022-12-12 23:03:03,432 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27751196172248804 [2022-12-12 23:03:03,433 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 257 predicate places. [2022-12-12 23:03:03,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 1587 transitions, 92496 flow [2022-12-12 23:03:03,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 1576 transitions, 91870 flow [2022-12-12 23:03:03,482 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1576 transitions, 91870 flow [2022-12-12 23:03:03,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:03:03,482 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:03,482 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:03,487 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 23:03:03,687 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 23:03:03,687 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 23:03:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash -345077076, now seen corresponding path program 17 times [2022-12-12 23:03:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:03,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658338607] [2022-12-12 23:03:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:03,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658338607] [2022-12-12 23:03:03,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658338607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916939151] [2022-12-12 23:03:03,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:03:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:03,776 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 23:03:03,777 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 23:03:03,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:03:03,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:03,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:03,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:03,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916939151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:03,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:03,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:03:03,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050753931] [2022-12-12 23:03:03,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:03,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:03:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:03:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:03:03,986 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:03,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1576 transitions, 91870 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:03:03,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:03,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:03,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:05,928 INFO L130 PetriNetUnfolder]: 1293/2480 cut-off events. [2022-12-12 23:03:05,929 INFO L131 PetriNetUnfolder]: For 3152/3152 co-relation queries the response was YES. [2022-12-12 23:03:05,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74161 conditions, 2480 events. 1293/2480 cut-off events. For 3152/3152 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15924 event pairs, 0 based on Foata normal form. 10/2082 useless extension candidates. Maximal degree in co-relation 39887. Up to 2402 conditions per place. [2022-12-12 23:03:05,952 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1289 selfloop transitions, 207 changer transitions 10/1506 dead transitions. [2022-12-12 23:03:05,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1506 transitions, 90774 flow [2022-12-12 23:03:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:03:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:03:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 91 transitions. [2022-12-12 23:03:05,953 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28173374613003094 [2022-12-12 23:03:05,953 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 271 predicate places. [2022-12-12 23:03:05,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 1506 transitions, 90774 flow [2022-12-12 23:03:05,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 1496 transitions, 90174 flow [2022-12-12 23:03:05,996 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 1496 transitions, 90174 flow [2022-12-12 23:03:05,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:03:05,997 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:05,997 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:06,001 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 23:03:06,201 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 23:03:06,201 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 23:03:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash -317877216, now seen corresponding path program 18 times [2022-12-12 23:03:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:06,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680960718] [2022-12-12 23:03:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:06,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:06,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680960718] [2022-12-12 23:03:06,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680960718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:06,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539934841] [2022-12-12 23:03:06,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:03:06,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:06,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:06,291 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 23:03:06,293 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 23:03:06,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:03:06,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:06,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:06,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539934841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:06,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:06,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:03:06,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647540056] [2022-12-12 23:03:06,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:06,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:03:06,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:03:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:03:06,501 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:06,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 1496 transitions, 90174 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:03:06,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:06,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:08,514 INFO L130 PetriNetUnfolder]: 1359/2628 cut-off events. [2022-12-12 23:03:08,514 INFO L131 PetriNetUnfolder]: For 3118/3118 co-relation queries the response was YES. [2022-12-12 23:03:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81249 conditions, 2628 events. 1359/2628 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17223 event pairs, 0 based on Foata normal form. 8/2204 useless extension candidates. Maximal degree in co-relation 44142. Up to 2550 conditions per place. [2022-12-12 23:03:08,539 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 1366 selfloop transitions, 229 changer transitions 8/1603 dead transitions. [2022-12-12 23:03:08,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 1603 transitions, 99857 flow [2022-12-12 23:03:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:03:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 23:03:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2022-12-12 23:03:08,540 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3967611336032389 [2022-12-12 23:03:08,540 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 283 predicate places. [2022-12-12 23:03:08,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 1603 transitions, 99857 flow [2022-12-12 23:03:08,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 1595 transitions, 99355 flow [2022-12-12 23:03:08,588 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1595 transitions, 99355 flow [2022-12-12 23:03:08,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:03:08,589 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:08,589 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:08,595 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 23:03:08,793 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 23:03:08,794 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 23:03:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -321445092, now seen corresponding path program 19 times [2022-12-12 23:03:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692405632] [2022-12-12 23:03:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692405632] [2022-12-12 23:03:08,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692405632] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141670197] [2022-12-12 23:03:08,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:03:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:08,859 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 23:03:08,861 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 23:03:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:08,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:09,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:09,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141670197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:09,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:09,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:03:09,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192160700] [2022-12-12 23:03:09,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:09,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:03:09,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:03:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:03:09,036 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:09,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1595 transitions, 99355 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:03:09,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:09,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:09,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:11,208 INFO L130 PetriNetUnfolder]: 1337/2598 cut-off events. [2022-12-12 23:03:11,208 INFO L131 PetriNetUnfolder]: For 3175/3175 co-relation queries the response was YES. [2022-12-12 23:03:11,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82916 conditions, 2598 events. 1337/2598 cut-off events. For 3175/3175 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17087 event pairs, 0 based on Foata normal form. 16/2190 useless extension candidates. Maximal degree in co-relation 45248. Up to 2520 conditions per place. [2022-12-12 23:03:11,234 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1267 selfloop transitions, 302 changer transitions 16/1585 dead transitions. [2022-12-12 23:03:11,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1585 transitions, 101905 flow [2022-12-12 23:03:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 23:03:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 23:03:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 106 transitions. [2022-12-12 23:03:11,235 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30994152046783624 [2022-12-12 23:03:11,236 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 300 predicate places. [2022-12-12 23:03:11,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 1585 transitions, 101905 flow [2022-12-12 23:03:11,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 322 places, 1569 transitions, 100881 flow [2022-12-12 23:03:11,285 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 1569 transitions, 100881 flow [2022-12-12 23:03:11,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:03:11,285 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:11,285 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:11,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-12 23:03:11,490 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 23:03:11,490 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 23:03:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -432049248, now seen corresponding path program 20 times [2022-12-12 23:03:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:11,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385218482] [2022-12-12 23:03:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:11,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:11,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385218482] [2022-12-12 23:03:11,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385218482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:11,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210903999] [2022-12-12 23:03:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:03:11,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:11,547 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 23:03:11,571 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 23:03:11,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:03:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:11,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:11,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210903999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:11,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:11,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-12 23:03:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774933420] [2022-12-12 23:03:11,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:11,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:03:11,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:03:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:03:11,729 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:11,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1569 transitions, 100881 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:03:11,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:11,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:11,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:13,782 INFO L130 PetriNetUnfolder]: 1317/2546 cut-off events. [2022-12-12 23:03:13,782 INFO L131 PetriNetUnfolder]: For 3163/3163 co-relation queries the response was YES. [2022-12-12 23:03:13,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83795 conditions, 2546 events. 1317/2546 cut-off events. For 3163/3163 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16534 event pairs, 0 based on Foata normal form. 8/2150 useless extension candidates. Maximal degree in co-relation 45871. Up to 2468 conditions per place. [2022-12-12 23:03:13,807 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1284 selfloop transitions, 249 changer transitions 16/1549 dead transitions. [2022-12-12 23:03:13,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1549 transitions, 102687 flow [2022-12-12 23:03:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:03:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:03:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 87 transitions. [2022-12-12 23:03:13,810 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2693498452012384 [2022-12-12 23:03:13,810 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 316 predicate places. [2022-12-12 23:03:13,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 1549 transitions, 102687 flow [2022-12-12 23:03:13,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 1533 transitions, 101631 flow [2022-12-12 23:03:13,859 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1533 transitions, 101631 flow [2022-12-12 23:03:13,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 23:03:13,859 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:13,859 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:13,866 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 23:03:14,064 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 23:03:14,064 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 23:03:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash -516134295, now seen corresponding path program 21 times [2022-12-12 23:03:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:14,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813088144] [2022-12-12 23:03:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:14,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813088144] [2022-12-12 23:03:14,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813088144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339313967] [2022-12-12 23:03:14,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:03:14,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:14,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:14,130 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 23:03:14,159 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 23:03:14,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:03:14,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:14,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:14,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:14,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339313967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:14,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:14,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-12 23:03:14,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813066795] [2022-12-12 23:03:14,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:14,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:03:14,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:03:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:03:14,340 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:14,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1533 transitions, 101631 flow. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:03:14,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:14,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:14,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:16,502 INFO L130 PetriNetUnfolder]: 1504/2888 cut-off events. [2022-12-12 23:03:16,503 INFO L131 PetriNetUnfolder]: For 3495/3495 co-relation queries the response was YES. [2022-12-12 23:03:16,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97958 conditions, 2888 events. 1504/2888 cut-off events. For 3495/3495 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19272 event pairs, 0 based on Foata normal form. 0/2425 useless extension candidates. Maximal degree in co-relation 53366. Up to 2802 conditions per place. [2022-12-12 23:03:16,532 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 1574 selfloop transitions, 174 changer transitions 0/1748 dead transitions. [2022-12-12 23:03:16,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1748 transitions, 119392 flow [2022-12-12 23:03:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:03:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:03:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2022-12-12 23:03:16,534 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-12 23:03:16,534 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 320 predicate places. [2022-12-12 23:03:16,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 1748 transitions, 119392 flow [2022-12-12 23:03:16,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 1748 transitions, 119392 flow [2022-12-12 23:03:16,594 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 1748 transitions, 119392 flow [2022-12-12 23:03:16,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:03:16,594 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:16,594 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:16,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 23:03:16,799 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 23:03:16,799 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 23:03:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1353860565, now seen corresponding path program 22 times [2022-12-12 23:03:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:16,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487900853] [2022-12-12 23:03:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:16,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:16,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487900853] [2022-12-12 23:03:16,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487900853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:16,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058921358] [2022-12-12 23:03:16,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:03:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:16,860 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 23:03:16,863 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 23:03:16,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:03:16,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:16,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:17,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058921358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:17,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:17,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-12 23:03:17,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158191457] [2022-12-12 23:03:17,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:17,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:03:17,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:03:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:03:17,022 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:17,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 1748 transitions, 119392 flow. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:03:17,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:17,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:17,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:19,750 INFO L130 PetriNetUnfolder]: 1513/2927 cut-off events. [2022-12-12 23:03:19,750 INFO L131 PetriNetUnfolder]: For 3554/3554 co-relation queries the response was YES. [2022-12-12 23:03:19,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102220 conditions, 2927 events. 1513/2927 cut-off events. For 3554/3554 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19725 event pairs, 0 based on Foata normal form. 8/2472 useless extension candidates. Maximal degree in co-relation 55289. Up to 2841 conditions per place. [2022-12-12 23:03:19,781 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1477 selfloop transitions, 274 changer transitions 24/1775 dead transitions. [2022-12-12 23:03:19,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1775 transitions, 124802 flow [2022-12-12 23:03:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:03:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:03:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 69 transitions. [2022-12-12 23:03:19,782 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33014354066985646 [2022-12-12 23:03:19,782 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 330 predicate places. [2022-12-12 23:03:19,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 352 places, 1775 transitions, 124802 flow [2022-12-12 23:03:19,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 352 places, 1751 transitions, 123098 flow [2022-12-12 23:03:19,844 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1751 transitions, 123098 flow [2022-12-12 23:03:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:03:19,844 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:19,844 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:19,851 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 23:03:20,049 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 23:03:20,050 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 23:03:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash -351033301, now seen corresponding path program 23 times [2022-12-12 23:03:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447471757] [2022-12-12 23:03:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:20,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447471757] [2022-12-12 23:03:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447471757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907237846] [2022-12-12 23:03:20,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:03:20,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:20,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:20,140 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 23:03:20,141 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 23:03:20,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:03:20,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:20,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:20,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907237846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:20,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:20,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-12 23:03:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880504382] [2022-12-12 23:03:20,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:20,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:03:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:03:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:03:20,334 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:20,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1751 transitions, 123098 flow. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 23:03:20,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:20,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:20,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:23,081 INFO L130 PetriNetUnfolder]: 1500/2920 cut-off events. [2022-12-12 23:03:23,082 INFO L131 PetriNetUnfolder]: For 3239/3239 co-relation queries the response was YES. [2022-12-12 23:03:23,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104928 conditions, 2920 events. 1500/2920 cut-off events. For 3239/3239 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19873 event pairs, 0 based on Foata normal form. 12/2469 useless extension candidates. Maximal degree in co-relation 57279. Up to 2840 conditions per place. [2022-12-12 23:03:23,113 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1437 selfloop transitions, 318 changer transitions 24/1779 dead transitions. [2022-12-12 23:03:23,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1779 transitions, 128634 flow [2022-12-12 23:03:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 23:03:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 23:03:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 108 transitions. [2022-12-12 23:03:23,114 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2022-12-12 23:03:23,115 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 347 predicate places. [2022-12-12 23:03:23,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 1779 transitions, 128634 flow [2022-12-12 23:03:23,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 1755 transitions, 126888 flow [2022-12-12 23:03:23,187 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1755 transitions, 126888 flow [2022-12-12 23:03:23,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 23:03:23,187 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:23,187 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:23,192 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 23:03:23,391 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 23:03:23,392 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 23:03:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash 645429291, now seen corresponding path program 24 times [2022-12-12 23:03:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:23,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602083543] [2022-12-12 23:03:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:23,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:23,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602083543] [2022-12-12 23:03:23,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602083543] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098541998] [2022-12-12 23:03:23,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:03:23,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:23,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:23,500 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 23:03:23,502 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 23:03:23,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:03:23,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:23,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:23,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098541998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:23,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:23,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:03:23,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223262870] [2022-12-12 23:03:23,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:23,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:03:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:03:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:03:23,769 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:23,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1755 transitions, 126888 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:03:23,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:23,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:23,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:26,522 INFO L130 PetriNetUnfolder]: 1705/3355 cut-off events. [2022-12-12 23:03:26,522 INFO L131 PetriNetUnfolder]: For 3344/3344 co-relation queries the response was YES. [2022-12-12 23:03:26,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123988 conditions, 3355 events. 1705/3355 cut-off events. For 3344/3344 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 23591 event pairs, 0 based on Foata normal form. 0/2794 useless extension candidates. Maximal degree in co-relation 66359. Up to 3275 conditions per place. [2022-12-12 23:03:26,560 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 1742 selfloop transitions, 314 changer transitions 0/2056 dead transitions. [2022-12-12 23:03:26,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 2056 transitions, 152822 flow [2022-12-12 23:03:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:03:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 23:03:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 99 transitions. [2022-12-12 23:03:26,561 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4008097165991903 [2022-12-12 23:03:26,561 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 359 predicate places. [2022-12-12 23:03:26,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 2056 transitions, 152822 flow [2022-12-12 23:03:26,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 381 places, 2056 transitions, 152822 flow [2022-12-12 23:03:26,635 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 2056 transitions, 152822 flow [2022-12-12 23:03:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 23:03:26,636 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:26,636 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:26,642 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 23:03:26,840 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 23:03:26,841 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 23:03:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1016943019, now seen corresponding path program 25 times [2022-12-12 23:03:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:26,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167722355] [2022-12-12 23:03:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:26,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:26,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167722355] [2022-12-12 23:03:26,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167722355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945808789] [2022-12-12 23:03:26,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:03:26,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:26,894 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 23:03:26,896 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 23:03:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:27,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:27,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945808789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:27,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:27,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 23:03:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451322927] [2022-12-12 23:03:27,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:03:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:03:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:03:27,084 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:27,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 2056 transitions, 152822 flow. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 23:03:27,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:27,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:27,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:30,071 INFO L130 PetriNetUnfolder]: 1661/3291 cut-off events. [2022-12-12 23:03:30,072 INFO L131 PetriNetUnfolder]: For 3328/3328 co-relation queries the response was YES. [2022-12-12 23:03:30,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124906 conditions, 3291 events. 1661/3291 cut-off events. For 3328/3328 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23192 event pairs, 0 based on Foata normal form. 20/2770 useless extension candidates. Maximal degree in co-relation 66477. Up to 3211 conditions per place. [2022-12-12 23:03:30,197 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1592 selfloop transitions, 416 changer transitions 20/2028 dead transitions. [2022-12-12 23:03:30,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2028 transitions, 154788 flow [2022-12-12 23:03:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 23:03:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 23:03:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 117 transitions. [2022-12-12 23:03:30,201 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34210526315789475 [2022-12-12 23:03:30,205 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 376 predicate places. [2022-12-12 23:03:30,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 398 places, 2028 transitions, 154788 flow [2022-12-12 23:03:30,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 398 places, 2008 transitions, 153253 flow [2022-12-12 23:03:30,281 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 2008 transitions, 153253 flow [2022-12-12 23:03:30,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 23:03:30,282 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:30,282 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:30,287 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 23:03:30,487 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 23:03:30,487 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 23:03:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash 972326659, now seen corresponding path program 26 times [2022-12-12 23:03:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:30,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231626364] [2022-12-12 23:03:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:30,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:30,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:30,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231626364] [2022-12-12 23:03:30,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231626364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:30,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780788696] [2022-12-12 23:03:30,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:03:30,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:30,577 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 23:03:30,578 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 23:03:30,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:03:30,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:30,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:30,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780788696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:30,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:03:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570070640] [2022-12-12 23:03:30,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:30,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:03:30,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:03:30,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:03:30,789 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:30,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 2008 transitions, 153253 flow. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 23:03:30,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:30,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:30,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:34,404 INFO L130 PetriNetUnfolder]: 1869/3693 cut-off events. [2022-12-12 23:03:34,404 INFO L131 PetriNetUnfolder]: For 3310/3310 co-relation queries the response was YES. [2022-12-12 23:03:34,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143901 conditions, 3693 events. 1869/3693 cut-off events. For 3310/3310 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26614 event pairs, 0 based on Foata normal form. 0/3072 useless extension candidates. Maximal degree in co-relation 76700. Up to 3613 conditions per place. [2022-12-12 23:03:34,442 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 1974 selfloop transitions, 303 changer transitions 0/2277 dead transitions. [2022-12-12 23:03:34,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2277 transitions, 178341 flow [2022-12-12 23:03:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 23:03:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 23:03:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 100 transitions. [2022-12-12 23:03:34,443 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3508771929824561 [2022-12-12 23:03:34,444 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 390 predicate places. [2022-12-12 23:03:34,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 412 places, 2277 transitions, 178341 flow [2022-12-12 23:03:34,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 412 places, 2277 transitions, 178341 flow [2022-12-12 23:03:34,522 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 2277 transitions, 178341 flow [2022-12-12 23:03:34,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 23:03:34,522 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:34,522 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:34,529 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 23:03:34,725 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 23:03:34,725 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 23:03:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1077335867, now seen corresponding path program 27 times [2022-12-12 23:03:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:34,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504602747] [2022-12-12 23:03:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:34,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504602747] [2022-12-12 23:03:34,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504602747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424797691] [2022-12-12 23:03:34,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:03:34,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:34,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:34,852 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 23:03:34,854 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 23:03:34,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:03:34,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:34,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:35,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 23:03:35,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424797691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:35,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:35,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-12 23:03:35,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287967468] [2022-12-12 23:03:35,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:35,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:03:35,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:03:35,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:03:35,065 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:35,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 2277 transitions, 178341 flow. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23:03:35,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:35,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:35,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:40,207 INFO L130 PetriNetUnfolder]: 1853/3677 cut-off events. [2022-12-12 23:03:40,207 INFO L131 PetriNetUnfolder]: For 3363/3363 co-relation queries the response was YES. [2022-12-12 23:03:40,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146955 conditions, 3677 events. 1853/3677 cut-off events. For 3363/3363 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26574 event pairs, 0 based on Foata normal form. 8/3072 useless extension candidates. Maximal degree in co-relation 78027. Up to 3597 conditions per place. [2022-12-12 23:03:40,256 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1821 selfloop transitions, 444 changer transitions 8/2273 dead transitions. [2022-12-12 23:03:40,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 2273 transitions, 182575 flow [2022-12-12 23:03:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 23:03:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 23:03:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 114 transitions. [2022-12-12 23:03:40,257 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2022-12-12 23:03:40,258 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 410 predicate places. [2022-12-12 23:03:40,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 432 places, 2273 transitions, 182575 flow [2022-12-12 23:03:40,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 431 places, 2265 transitions, 181929 flow [2022-12-12 23:03:40,341 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 2265 transitions, 181929 flow [2022-12-12 23:03:40,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 23:03:40,341 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:40,341 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:40,347 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 23:03:40,546 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 23:03:40,546 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 23:03:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:40,547 INFO L85 PathProgramCache]: Analyzing trace with hash -290640453, now seen corresponding path program 28 times [2022-12-12 23:03:40,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:40,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320445323] [2022-12-12 23:03:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:40,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:40,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320445323] [2022-12-12 23:03:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320445323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102213140] [2022-12-12 23:03:40,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:03:40,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:40,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:40,605 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 23:03:40,636 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 23:03:40,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:03:40,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:03:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:40,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:40,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102213140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:40,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:40,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 23:03:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311583060] [2022-12-12 23:03:40,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:40,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:03:40,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:03:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:03:40,829 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:03:40,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 2265 transitions, 181929 flow. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 23:03:40,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:40,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:03:40,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:45,125 INFO L130 PetriNetUnfolder]: 1935/3851 cut-off events. [2022-12-12 23:03:45,125 INFO L131 PetriNetUnfolder]: For 3350/3350 co-relation queries the response was YES. [2022-12-12 23:03:45,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157783 conditions, 3851 events. 1935/3851 cut-off events. For 3350/3350 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28240 event pairs, 0 based on Foata normal form. 8/3210 useless extension candidates. Maximal degree in co-relation 83510. Up to 3771 conditions per place. [2022-12-12 23:03:45,168 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 1894 selfloop transitions, 472 changer transitions 21/2387 dead transitions. [2022-12-12 23:03:45,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2387 transitions, 196517 flow [2022-12-12 23:03:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:03:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:03:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 102 transitions. [2022-12-12 23:03:45,169 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26842105263157895 [2022-12-12 23:03:45,169 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 428 predicate places. [2022-12-12 23:03:45,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 450 places, 2387 transitions, 196517 flow [2022-12-12 23:03:45,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 448 places, 2366 transitions, 194780 flow [2022-12-12 23:03:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 2366 transitions, 194780 flow [2022-12-12 23:03:45,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 23:03:45,258 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:45,258 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:45,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-12 23:03:45,463 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 23:03:45,463 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 23:03:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash -842790254, now seen corresponding path program 29 times [2022-12-12 23:03:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025221866] [2022-12-12 23:03:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:45,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:03:45,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:45,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025221866] [2022-12-12 23:03:45,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025221866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:45,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700683054] [2022-12-12 23:03:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:03:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:45,782 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 23:03:45,784 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 23:03:45,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:03:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 23:03:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:46,042 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2022-12-12 23:03:46,043 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 80 treesize of output 51 [2022-12-12 23:03:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:03:46,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:46,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:03:46,127 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 84 treesize of output 70 [2022-12-12 23:03:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:03:46,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700683054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:46,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:46,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-12-12 23:03:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748402199] [2022-12-12 23:03:46,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:46,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 23:03:46,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 23:03:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-12 23:03:46,197 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:03:46,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 2366 transitions, 194780 flow. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 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 23:03:46,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:46,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:03:46,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:50,882 INFO L130 PetriNetUnfolder]: 1966/3865 cut-off events. [2022-12-12 23:03:50,882 INFO L131 PetriNetUnfolder]: For 4698/4698 co-relation queries the response was YES. [2022-12-12 23:03:50,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162114 conditions, 3865 events. 1966/3865 cut-off events. For 4698/4698 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28031 event pairs, 0 based on Foata normal form. 27/3249 useless extension candidates. Maximal degree in co-relation 84132. Up to 3781 conditions per place. [2022-12-12 23:03:50,918 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 1414 selfloop transitions, 53 changer transitions 904/2382 dead transitions. [2022-12-12 23:03:50,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 2382 transitions, 200840 flow [2022-12-12 23:03:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:03:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:03:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2022-12-12 23:03:50,919 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3923444976076555 [2022-12-12 23:03:50,919 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 436 predicate places. [2022-12-12 23:03:50,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 458 places, 2382 transitions, 200840 flow [2022-12-12 23:03:50,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 449 places, 1478 transitions, 124661 flow [2022-12-12 23:03:50,979 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1478 transitions, 124661 flow [2022-12-12 23:03:50,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 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 23:03:50,979 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:50,980 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:50,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-12 23:03:51,184 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 23:03:51,185 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 23:03:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1177097117, now seen corresponding path program 30 times [2022-12-12 23:03:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:51,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027830230] [2022-12-12 23:03:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:03:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:52,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027830230] [2022-12-12 23:03:52,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027830230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:52,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252059989] [2022-12-12 23:03:52,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:03:52,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:52,392 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 23:03:52,394 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 23:03:52,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:03:52,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:03:52,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:03:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:52,761 INFO L321 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2022-12-12 23:03:52,762 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 52 [2022-12-12 23:03:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:03:52,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:52,881 INFO L321 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2022-12-12 23:03:52,881 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 105 [2022-12-12 23:03:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:03:52,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252059989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:52,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:52,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 4] total 22 [2022-12-12 23:03:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265123667] [2022-12-12 23:03:52,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:52,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 23:03:52,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:52,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 23:03:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-12-12 23:03:52,903 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:03:52,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1478 transitions, 124661 flow. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 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 23:03:52,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:52,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:03:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:03:56,902 INFO L130 PetriNetUnfolder]: 2180/4349 cut-off events. [2022-12-12 23:03:56,902 INFO L131 PetriNetUnfolder]: For 5994/5994 co-relation queries the response was YES. [2022-12-12 23:03:56,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186845 conditions, 4349 events. 2180/4349 cut-off events. For 5994/5994 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32970 event pairs, 0 based on Foata normal form. 12/3520 useless extension candidates. Maximal degree in co-relation 129411. Up to 4266 conditions per place. [2022-12-12 23:03:56,956 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 2183 selfloop transitions, 363 changer transitions 70/2627 dead transitions. [2022-12-12 23:03:56,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 2627 transitions, 227042 flow [2022-12-12 23:03:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 23:03:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 23:03:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 164 transitions. [2022-12-12 23:03:56,957 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2022-12-12 23:03:56,958 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 447 predicate places. [2022-12-12 23:03:56,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 469 places, 2627 transitions, 227042 flow [2022-12-12 23:03:57,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 469 places, 2557 transitions, 220950 flow [2022-12-12 23:03:57,073 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 2557 transitions, 220950 flow [2022-12-12 23:03:57,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 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 23:03:57,073 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:03:57,073 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:03:57,080 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 23:03:57,278 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 23:03:57,279 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 23:03:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:03:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1907906205, now seen corresponding path program 31 times [2022-12-12 23:03:57,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:03:57,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563665501] [2022-12-12 23:03:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:03:57,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:03:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:03:58,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:03:58,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563665501] [2022-12-12 23:03:58,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563665501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:03:58,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228441946] [2022-12-12 23:03:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:03:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:03:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:03:58,794 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 23:03:58,807 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 23:03:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:03:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 23:03:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:03:59,110 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-12 23:03:59,110 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 90 treesize of output 83 [2022-12-12 23:03:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:03:59,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:03:59,228 INFO L321 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2022-12-12 23:03:59,228 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 108 treesize of output 97 [2022-12-12 23:03:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 23:03:59,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228441946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:03:59,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:03:59,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 19 [2022-12-12 23:03:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538694067] [2022-12-12 23:03:59,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:03:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:03:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:03:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:03:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-12-12 23:03:59,254 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:03:59,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 2557 transitions, 220950 flow. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 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 23:03:59,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:03:59,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:03:59,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:04:09,675 INFO L130 PetriNetUnfolder]: 3864/7628 cut-off events. [2022-12-12 23:04:09,676 INFO L131 PetriNetUnfolder]: For 9227/9227 co-relation queries the response was YES. [2022-12-12 23:04:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335416 conditions, 7628 events. 3864/7628 cut-off events. For 9227/9227 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 63610 event pairs, 0 based on Foata normal form. 34/6187 useless extension candidates. Maximal degree in co-relation 226723. Up to 7509 conditions per place. [2022-12-12 23:04:09,938 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 3526 selfloop transitions, 816 changer transitions 212/4565 dead transitions. [2022-12-12 23:04:09,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 4565 transitions, 403838 flow [2022-12-12 23:04:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 23:04:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 23:04:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 150 transitions. [2022-12-12 23:04:09,939 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4155124653739612 [2022-12-12 23:04:09,940 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 465 predicate places. [2022-12-12 23:04:09,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 487 places, 4565 transitions, 403838 flow [2022-12-12 23:04:10,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 487 places, 4353 transitions, 384972 flow [2022-12-12 23:04:10,151 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 4353 transitions, 384972 flow [2022-12-12 23:04:10,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 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 23:04:10,152 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:04:10,152 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:04:10,157 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 23:04:10,357 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 23:04:10,357 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 23:04:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:04:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1682174565, now seen corresponding path program 32 times [2022-12-12 23:04:10,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:04:10,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847954846] [2022-12-12 23:04:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:04:10,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:04:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:04:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:04:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:04:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847954846] [2022-12-12 23:04:11,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847954846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:04:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742423062] [2022-12-12 23:04:11,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:04:11,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:04:11,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:04:11,616 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 23:04:11,642 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 23:04:11,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:04:11,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:04:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 23:04:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:04:12,067 INFO L321 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2022-12-12 23:04:12,068 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 58 [2022-12-12 23:04:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:04:12,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:04:12,223 INFO L321 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2022-12-12 23:04:12,224 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 113 [2022-12-12 23:04:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:04:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742423062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:04:12,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:04:12,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 29 [2022-12-12 23:04:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548258960] [2022-12-12 23:04:12,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:04:12,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 23:04:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:04:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 23:04:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-12-12 23:04:12,391 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:04:12,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 4353 transitions, 384972 flow. Second operand has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 0 states have call successors, (0), 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 23:04:12,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:04:12,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:04:12,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:04:37,254 INFO L130 PetriNetUnfolder]: 5171/10148 cut-off events. [2022-12-12 23:04:37,254 INFO L131 PetriNetUnfolder]: For 12963/12963 co-relation queries the response was YES. [2022-12-12 23:04:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456248 conditions, 10148 events. 5171/10148 cut-off events. For 12963/12963 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 87940 event pairs, 0 based on Foata normal form. 19/8198 useless extension candidates. Maximal degree in co-relation 273225. Up to 10007 conditions per place. [2022-12-12 23:04:37,377 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 5355 selfloop transitions, 645 changer transitions 116/6127 dead transitions. [2022-12-12 23:04:37,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 6127 transitions, 553952 flow [2022-12-12 23:04:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 23:04:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 23:04:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 173 transitions. [2022-12-12 23:04:37,379 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3793859649122807 [2022-12-12 23:04:37,379 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 488 predicate places. [2022-12-12 23:04:37,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 510 places, 6127 transitions, 553952 flow [2022-12-12 23:04:37,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 510 places, 6011 transitions, 543389 flow [2022-12-12 23:04:37,658 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 6011 transitions, 543389 flow [2022-12-12 23:04:37,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 0 states have call successors, (0), 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 23:04:37,659 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:04:37,659 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:04:37,667 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 23:04:37,864 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 23:04:37,864 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 23:04:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:04:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1526992715, now seen corresponding path program 33 times [2022-12-12 23:04:37,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:04:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122689951] [2022-12-12 23:04:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:04:37,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:04:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:04:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:04:39,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:04:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122689951] [2022-12-12 23:04:39,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122689951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:04:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206536917] [2022-12-12 23:04:39,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:04:39,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:04:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:04:39,159 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 23:04:39,188 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 23:04:39,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:04:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:04:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-12 23:04:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:04:39,351 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-12 23:04:39,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-12-12 23:04:39,438 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 23:04:39,438 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-12 23:04:39,843 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 23:04:39,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 61 [2022-12-12 23:04:39,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:04:39,877 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 46 treesize of output 41 [2022-12-12 23:04:40,099 INFO L321 Elim1Store]: treesize reduction 36, result has 69.2 percent of original size [2022-12-12 23:04:40,100 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 122 treesize of output 128 [2022-12-12 23:04:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:04:40,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:04:40,539 INFO L321 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2022-12-12 23:04:40,539 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 288 treesize of output 189 [2022-12-12 23:04:40,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:04:40,550 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 98 treesize of output 72 [2022-12-12 23:04:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:04:40,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206536917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:04:40,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:04:40,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2022-12-12 23:04:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229951348] [2022-12-12 23:04:40,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:04:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:04:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:04:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:04:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=942, Unknown=1, NotChecked=0, Total=1056 [2022-12-12 23:04:40,842 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:04:40,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 6011 transitions, 543389 flow. Second operand has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:04:40,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:04:40,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:04:40,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:04:46,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-12 23:05:55,277 INFO L130 PetriNetUnfolder]: 8349/16535 cut-off events. [2022-12-12 23:05:55,278 INFO L131 PetriNetUnfolder]: For 26069/26069 co-relation queries the response was YES. [2022-12-12 23:05:55,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759650 conditions, 16535 events. 8349/16535 cut-off events. For 26069/26069 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 155150 event pairs, 0 based on Foata normal form. 32/13299 useless extension candidates. Maximal degree in co-relation 333344. Up to 16294 conditions per place. [2022-12-12 23:05:55,513 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 7999 selfloop transitions, 1740 changer transitions 222/9972 dead transitions. [2022-12-12 23:05:55,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 9972 transitions, 921904 flow [2022-12-12 23:05:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 23:05:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 23:05:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 280 transitions. [2022-12-12 23:05:55,515 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2022-12-12 23:05:55,515 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 519 predicate places. [2022-12-12 23:05:55,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 9972 transitions, 921904 flow [2022-12-12 23:05:56,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 9750 transitions, 901258 flow [2022-12-12 23:05:56,234 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 9750 transitions, 901258 flow [2022-12-12 23:05:56,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:05:56,234 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:05:56,234 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:05:56,241 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 23:05:56,439 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 23:05:56,440 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 23:05:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:05:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash 679543113, now seen corresponding path program 34 times [2022-12-12 23:05:56,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:05:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141769300] [2022-12-12 23:05:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:05:56,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:05:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:05:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:05:57,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:05:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141769300] [2022-12-12 23:05:57,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141769300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:05:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88508730] [2022-12-12 23:05:57,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:05:57,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:05:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:05:57,578 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 23:05:57,580 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 23:05:57,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:05:57,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:05:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:05:57,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:05:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:05:57,866 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 23:05:57,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-12-12 23:05:57,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-12 23:05:58,602 INFO L321 Elim1Store]: treesize reduction 84, result has 78.2 percent of original size [2022-12-12 23:05:58,603 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 13 new quantified variables, introduced 28 case distinctions, treesize of input 199 treesize of output 374 [2022-12-12 23:06:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 23:06:49,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:06:49,835 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1850 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1850))) (let ((.cse3 (select .cse2 c_~f_inv~0.base))) (let ((.cse1 (select .cse3 (+ (* c_~counter~0 4) c_~f_inv~0.offset)))) (let ((.cse0 (select (select .cse2 c_~f~0.base) (+ c_~f~0.offset (* (select .cse3 (+ (* .cse1 4) c_~f_inv~0.offset)) 4))))) (or (= .cse0 0) (not (= .cse1 .cse0)))))))) is different from false [2022-12-12 23:06:49,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:06:49,900 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 400 treesize of output 310 [2022-12-12 23:06:49,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:06:49,942 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 304 treesize of output 252 [2022-12-12 23:06:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:06:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88508730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:06:53,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:06:53,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2022-12-12 23:06:53,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693952776] [2022-12-12 23:06:53,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:06:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 23:06:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:06:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 23:06:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=665, Unknown=1, NotChecked=52, Total=812 [2022-12-12 23:06:53,019 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:06:53,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 9750 transitions, 901258 flow. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 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 23:06:53,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:06:53,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:06:53,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:09:30,258 INFO L130 PetriNetUnfolder]: 10446/20508 cut-off events. [2022-12-12 23:09:30,259 INFO L131 PetriNetUnfolder]: For 38289/38289 co-relation queries the response was YES. [2022-12-12 23:09:30,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962278 conditions, 20508 events. 10446/20508 cut-off events. For 38289/38289 co-relation queries the response was YES. Maximal size of possible extension queue 1533. Compared 197619 event pairs, 0 based on Foata normal form. 27/16596 useless extension candidates. Maximal degree in co-relation 359314. Up to 20201 conditions per place. [2022-12-12 23:09:30,554 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 10257 selfloop transitions, 1810 changer transitions 199/12276 dead transitions. [2022-12-12 23:09:30,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 12276 transitions, 1159515 flow [2022-12-12 23:09:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:09:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:09:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 164 transitions. [2022-12-12 23:09:30,560 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2022-12-12 23:09:30,560 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 538 predicate places. [2022-12-12 23:09:30,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 12276 transitions, 1159515 flow [2022-12-12 23:09:31,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 542 places, 12077 transitions, 1140647 flow [2022-12-12 23:09:31,333 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 12077 transitions, 1140647 flow [2022-12-12 23:09:31,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 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 23:09:31,333 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:09:31,333 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:09:31,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-12 23:09:31,535 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 23:09:31,536 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 23:09:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:09:31,536 INFO L85 PathProgramCache]: Analyzing trace with hash -305480866, now seen corresponding path program 35 times [2022-12-12 23:09:31,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:09:31,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657710260] [2022-12-12 23:09:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:09:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:09:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:09:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:09:33,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:09:33,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657710260] [2022-12-12 23:09:33,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657710260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:09:33,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577475351] [2022-12-12 23:09:33,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:09:33,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:09:33,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:09:33,003 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 23:09:33,042 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 23:09:33,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:09:33,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:09:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-12 23:09:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:09:33,219 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-12 23:09:33,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 23 [2022-12-12 23:09:33,288 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-12 23:09:33,288 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 23:09:33,403 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-12 23:09:33,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 44 [2022-12-12 23:09:33,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-12 23:09:33,619 INFO L321 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-12-12 23:09:33,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 34 [2022-12-12 23:09:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:09:33,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:09:33,861 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1904 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1904))) (let ((.cse0 (select .cse2 c_~f_inv~0.base))) (let ((.cse1 (select .cse0 (+ (* (select (select .cse2 c_~f~0.base) (+ (* c_~counter~0 4) c_~f~0.offset)) 4) c_~f_inv~0.offset)))) (or (= (select .cse0 (+ c_~f_inv~0.offset (* .cse1 4))) 0) (not (= .cse1 c_~counter~0))))))) is different from false [2022-12-12 23:09:33,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:09:33,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 344 treesize of output 416 [2022-12-12 23:09:34,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:09:34,058 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 258 treesize of output 310 [2022-12-12 23:11:59,435 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-12 23:11:59,593 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-12 23:11:59,610 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-12 23:11:59,925 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:01,523 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:04,606 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:05,420 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:05,536 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:07,321 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:08,378 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:08,684 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:08,703 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:08,705 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:08,821 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:09,793 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-12 23:12:10,433 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:10,570 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:10,587 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:10,768 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-12 23:12:10,876 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:11,357 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:11,507 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:12,138 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-12 23:12:12,766 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-12 23:12:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-12 23:12:15,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577475351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:15,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:15,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 28 [2022-12-12 23:12:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241590353] [2022-12-12 23:12:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:15,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:12:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:12:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=719, Unknown=1, NotChecked=54, Total=870 [2022-12-12 23:12:15,166 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2022-12-12 23:12:15,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 12077 transitions, 1140647 flow. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 0 states have call successors, (0), 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 23:12:15,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:15,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2022-12-12 23:12:15,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:16:07,531 INFO L130 PetriNetUnfolder]: 11879/23444 cut-off events. [2022-12-12 23:16:07,531 INFO L131 PetriNetUnfolder]: For 46615/46615 co-relation queries the response was YES. [2022-12-12 23:16:07,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1123587 conditions, 23444 events. 11879/23444 cut-off events. For 46615/46615 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 230424 event pairs, 0 based on Foata normal form. 13/18850 useless extension candidates. Maximal degree in co-relation 414604. Up to 23125 conditions per place. [2022-12-12 23:16:07,948 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 11907 selfloop transitions, 2088 changer transitions 82/14087 dead transitions. [2022-12-12 23:16:07,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 14087 transitions, 1358917 flow [2022-12-12 23:16:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 23:16:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 23:16:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 193 transitions. [2022-12-12 23:16:07,952 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4232456140350877 [2022-12-12 23:16:07,952 INFO L295 CegarLoopForPetriNet]: 22 programPoint places, 543 predicate places. [2022-12-12 23:16:07,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 565 places, 14087 transitions, 1358917 flow [2022-12-12 23:16:08,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 565 places, 14005 transitions, 1350958 flow [2022-12-12 23:16:08,833 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 14005 transitions, 1350958 flow [2022-12-12 23:16:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 0 states have call successors, (0), 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 23:16:08,833 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:16:08,833 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:16:08,838 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 23:16:09,037 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 23:16:09,038 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 23:16:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:16:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2127663337, now seen corresponding path program 36 times [2022-12-12 23:16:09,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:16:09,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952051492] [2022-12-12 23:16:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:16:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:16:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:16:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:16:09,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:16:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952051492] [2022-12-12 23:16:09,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952051492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:16:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541524686] [2022-12-12 23:16:09,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:16:09,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:16:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:16:09,141 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 23:16:09,159 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 23:16:09,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:16:09,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:16:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:16:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:16:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:16:09,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:16:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:16:09,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541524686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:16:09,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:16:09,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-12 23:16:09,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399127909] [2022-12-12 23:16:09,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:16:09,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:16:09,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:16:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:16:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:16:09,425 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 23:16:09,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 14005 transitions, 1350958 flow. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 23:16:09,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:16:09,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 23:16:09,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 23:16:37,390 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:16:37,390 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 23:16:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:16:37,397 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 23:16:37,403 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 23:16:37,603 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 23:16:37,603 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 0/19 universal loopers) in iteration 48,while PetriNetUnfolder was constructing finite prefix that currently has 131375 conditions, 2730 events (1393/2729 cut-off events. For 36735/36735 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 23677 event pairs, 0 based on Foata normal form. 1/3073 useless extension candidates. Maximal degree in co-relation 45669. Up to 2527 conditions per place.). [2022-12-12 23:16:37,604 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 23:16:37,605 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 23:16:37,605 INFO L445 BasicCegarLoop]: Path program histogram: [36, 4, 3, 2, 1, 1, 1] [2022-12-12 23:16:37,607 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:16:37,607 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:16:37,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:16:37 BasicIcfg [2022-12-12 23:16:37,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:16:37,609 INFO L158 Benchmark]: Toolchain (without parser) took 851691.58ms. Allocated memory was 255.9MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 220.8MB in the beginning and 316.9MB in the end (delta: -96.1MB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2022-12-12 23:16:37,609 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 232.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:16:37,609 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.01ms. Allocated memory is still 255.9MB. Free memory was 220.5MB in the beginning and 208.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 23:16:37,609 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.64ms. Allocated memory is still 255.9MB. Free memory was 208.4MB in the beginning and 206.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:16:37,610 INFO L158 Benchmark]: Boogie Preprocessor took 35.09ms. Allocated memory is still 255.9MB. Free memory was 206.3MB in the beginning and 204.5MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 23:16:37,610 INFO L158 Benchmark]: RCFGBuilder took 595.97ms. Allocated memory is still 255.9MB. Free memory was 204.5MB in the beginning and 209.7MB in the end (delta: -5.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-12-12 23:16:37,610 INFO L158 Benchmark]: TraceAbstraction took 850768.59ms. Allocated memory was 255.9MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 208.6MB in the beginning and 316.9MB in the end (delta: -108.2MB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2022-12-12 23:16:37,611 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 255.9MB. Free memory is still 232.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 240.01ms. Allocated memory is still 255.9MB. Free memory was 220.5MB in the beginning and 208.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.64ms. Allocated memory is still 255.9MB. Free memory was 208.4MB in the beginning and 206.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.09ms. Allocated memory is still 255.9MB. Free memory was 206.3MB in the beginning and 204.5MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 595.97ms. Allocated memory is still 255.9MB. Free memory was 204.5MB in the beginning and 209.7MB in the end (delta: -5.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 850768.59ms. Allocated memory was 255.9MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 208.6MB in the beginning and 316.9MB in the end (delta: -108.2MB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 134 PlacesBefore, 22 PlacesAfterwards, 140 TransitionsBefore, 19 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 93 TrivialYvCompositions, 19 ConcurrentYvCompositions, 9 ChoiceCompositions, 121 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 257, independent: 253, independent conditional: 253, independent unconditional: 0, dependent: 4, dependent conditional: 4, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 257, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 257, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 257, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 257, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 257, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 52, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 257, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 257, unknown conditional: 0, unknown unconditional: 257] , Statistics on independence cache: Total cache size (in pairs): 395, Positive cache size: 391, Positive conditional cache size: 0, Positive unconditional cache size: 391, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, 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 (14states, 0/19 universal loopers) in iteration 48,while PetriNetUnfolder was constructing finite prefix that currently has 131375 conditions, 2730 events (1393/2729 cut-off events. For 36735/36735 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 23677 event pairs, 0 based on Foata normal form. 1/3073 useless extension candidates. Maximal degree in co-relation 45669. Up to 2527 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 (14states, 0/19 universal loopers) in iteration 48,while PetriNetUnfolder was constructing finite prefix that currently has 131375 conditions, 2730 events (1393/2729 cut-off events. For 36735/36735 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 23677 event pairs, 0 based on Foata normal form. 1/3073 useless extension candidates. Maximal degree in co-relation 45669. Up to 2527 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 (14states, 0/19 universal loopers) in iteration 48,while PetriNetUnfolder was constructing finite prefix that currently has 131375 conditions, 2730 events (1393/2729 cut-off events. For 36735/36735 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 23677 event pairs, 0 based on Foata normal form. 1/3073 useless extension candidates. Maximal degree in co-relation 45669. Up to 2527 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 158 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 4.3s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 850.7s, OverallIterations: 48, TraceHistogramMax: 3, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 589.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 4074 SdHoareTripleChecker+Valid, 10.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4074 mSDsluCounter, 377 SdHoareTripleChecker+Invalid, 9.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 141 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 817 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14931 IncrementalHoareTripleChecker+Invalid, 15913 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 817 mSolverCounterUnsat, 136 mSDtfsCounter, 14931 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2635 GetRequests, 1624 SyntacticMatches, 117 SemanticMatches, 894 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 5107 ImplicationChecksByTransitivity, 18.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1350958occurred in iteration=47, InterpolantAutomatonStates: 651, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 47 MinimizatonAttempts, 188719 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 236.1s InterpolantComputationTime, 1901 NumberOfCodeBlocks, 1858 NumberOfCodeBlocksAsserted, 130 NumberOfCheckSat, 2652 ConstructedInterpolants, 50 QuantifiedInterpolants, 18512 SizeOfPredicates, 273 NumberOfNonLiveVariables, 10121 ConjunctsInSsa, 602 ConjunctsInUnsatCore, 134 InterpolantComputations, 6 PerfectInterpolantSequences, 667/1061 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